• 中国中文核心期刊
  • 中国科学引文数据库(CSCD)核心库来源期刊
  • 中国科技论文统计源期刊(CJCR)
  • 第二届国家期刊奖提名奖

2005 Vol. 18, No. 5

Display Method:
2005, 18(5): 502-502.
Abstract:
Study on Genetic Diversity of Daemonorops margaritae Using RAPD
YANG Hua, YIN Guang-tian, GAN Si-ming, BAI Jia-yu, LI Rong-sheng, YANG Jin-chang, CHEN He-ming
2005, 18(5): 505-509.
Abstract:
The paper analyzed the genetic diversity of Daemonorops margaritae(Hance) Beccari using RAPD,based on four natural populations.A total of 154 sites were detected by 15 primers,which the proportion of polymorphic loci was 75.97%.The Nei's index and Shannon information index were 0.258 4 and 0.388 8,and total genetic diversity was(0.257 8).Genetic diversity of D.margaritae mainly distributed within population,which the coefficient of gene differentiation was 0.141 2.Genetic identity between Maoganxiang and Jianfengling population was the highest while that between Diaoluoshan and Bawangling population was the lowest.The results of AMOVA indicated that most of the variation(97.38%) resided within population.It was concluded from present study that there existed high genetic diversity of D.margaritae genetic resources,especially in Jianfengling population,which should be the priority population to be protected.
Relationships between Geographical Distribution of Taxus wallichiana and Climate in China
SU Jian-rong, ZHANG Zhi-jun, DENG Jiang, LI Guo-song
2005, 18(5): 510-515.
Abstract:
According to the data on geographical distribution of Taxus wallichiana Cheng et L.K.Fu,several indexes widely used for the study of vegetation-climate interaction were applied.These indexes included Kira's warmth index and coldness index,Xu's humidity index,Penman's formula,Thornthwaite's indexes and climate classification,Holdridge's life zone classification system,annual average temperature,mean temperature in January,mean temperature in July,maximum temperature,minimum temperature,≥10 ℃ accumulated temperature and precipitation.The relationship between the distribution of T.wallichiana and climate in China was analized and the Kira's water-temperature indexes on distributional upper limit,lower limit and north limit were discussed.The principal component analysis showed that relative effect of climate indexes on the distribution of T.wallichiana followed the order thermal factor in coldness month relative humidity thermal factor in hotness month accumulated sunshine time.
Genetic Analysis and Breeding Value Estimation of Seedling Seed Orchard of Eucalyptus urophylla I.Establishment Based on Backward Selection
XU Jian-min, LU Zhao-hua, BAI Jia-yu, WANG Shang-ming, YANG Guo-qing, LI Guang-you
2005, 18(5): 516-523.
Abstract:
The Eucalyptus urophylla seedling seed orchard used in this study was established based on backward selection involving 45 families within 7 provenances.Results showed that there were highly significant differences in growth and stem form,rate of blossoming and other characters among families and provenances at the age of 3.The growth,stem form and tree crown of Eucalyptus urophylla were moderately or strongly hereditary at provenance,family and individual levels,and genetic coefficient variance of characters were minor by age increasing,and provenance heritablityfamily heritablityindividual heritablity.Thirty-eight families(84.4% of the total) in SSObs produced higher stem volume than those of the control No.1(CK1),and 39 families(86.7%) were better than the control No.2(CK2) regarding the stem volume.These results showed that most of the parent materials in the SSObs had ideal genetic properties.Information obtained from estimating the breeding value of family and individuals in family using BLUP method,and from the selection of ideal families and individuals,provided valuable evidence for the genetic thinning management of SSObs.The genetic structure of E.urophylla in SSObs was considered to be the genetic mode of additive gene + dominate gene.This result was vital for the management of the SSObs by thinning the inferior and reserving the superior.
Study on the Growth of Old Larix leptolepis Stands in Mountainous Regions of Eastern Liaoning Province
WANG He-xin, ZHU Jiao-jun, CHEN Ying-min, LIU Zu-gen, WU Feng-zhang, WU Juan
2005, 18(5): 524-529.
Abstract:
Liaoning province is one of areas with a long history of introduction of Larix leptolepis Gordon and is the largest area of L.leptolepis plantation in China.Production of the short rotation and small dimension wood was the major way of management of L.leptolepis for a long time,as the result,over 60-year-old L.leptolepis stands were seldom to the seen.In recent years,much L.leptolepis plantation were defined as commonweal forest accordiy to classified forest management,therefore,a few L.leptolepis stands would be given up the way of short rotation and be selected the way of long rotation.However,now the management experience of long rotation were absent in China.This paper analyzed the growth characteristics of tree and stand of old L.leptolepis remained in mountainous regions of east Liaoning Province.The results showed that the rate of large dimension wood with diameter at breast height over 30 cm accounted for 90% in 60~86-year-old L.leptolepis stands,and current annual increment of diameter at breast height stayed high growth in all investigated stands and the Percentage Growth Change of diameter at breast height were obvious after thinning.Compared with the original region of L.leptolepis,Nagano-ken in Japan,the growth of tree and diameter at breast height had not difference.According to the management standard of long rotation of L.leptolepis in Japan,the stand which had much growth potential could be cultivated to its fixed number of year with big extent and put long management into practice.
Study on the Cultivation Technique for Non-knot Timber of Cunninghamia lanceolata
CHENG Chao-yang
2005, 18(5): 530-634.
Abstract:
The approach of cultivation for the target-tree was studied.The method which planting Chinese fir with non-knot timber by artificial pruning,could improved the timber value of Chinese fir in the southern market.To form a series of intact technique,reserve density and pruning intensity were identified as the factors in the test design.According to 4 years' observation,the analysis showed that:(1)the growth of Chinese fir had not been distinctly affected by different reserve density in the initial 8 years.At the range of 1 800 trees·hm-2,a denser reserve density could be setted;(2)The growth of Chinese fir would been distinctly affected by different pruning intensity.The stronger the pruning intensity,the lower the growth in the tree height,diameter breast height and crown width of Chinese fir would be.Considering the impact of pruning and the growth of Chinese fir,the pruning intensity of 10 cm was the best.
Multi-factors Fertilization Trial of Tectona grandis in Seedling Stage
LIANG Kun-nan, PAN Yi-feng, LIU Wen-ming
2005, 18(5): 535-540.
Abstract:
The trial,designed by orthogonal design with a L8(41×24) of N,P,K,Mg and Zeolite(Z) for 2,4,2,2,2 levels respectively,was to research the effects of different fertilizer treatments on the growth and dry biomass of seedlings of Tectona grandis.The results of variance analysis of fertilizer trial of Tectona grandis in seedling stage showed that there were high significant difference among different fertilizer treatments on the growths and dry biomass in 7 months,treatment 5(P12N1K1Mg2) of which was the best treatment among 8 fertilizer treatments on growth and each dry biomass,and had high significant or significant difference with other 7 fertilizer treatments.Compared with the contrast(no fertilizer treatment),treatment 5 on seedling height,ground diameter,total dry biomass,root dry biomass,stem dry biomass and leaf dry biomass at 7 months were 3.58,2.74,11.78,11.29,10.24,17.79 and 8.15 times that of the contrast respectively.Zeolite can promote the growth of seedling stock of T.grandis and the formation of biomass of each organ.Treatments with zeolite on seedling height,ground diameter,total dry biomass,root dry biomass, stem dry biomass and leaf dry biomass at 7 months were 2.10,1.69,4.02,3.17,2.94 and 2.60 times that of treatments without zeolite.There are also high significant differences on growths and dry biomass of seedlings among different P levels,the low P levels of which were superior to the high P levels on growths and dry biomasses of seedlings.The best application of P fertilizer in containerized seedling stock culture was 0.7% of weight of medium.Treatment added Mg could also promote the growth of seedling stocks and increase the biomass of seedling stocks.This trial will provided scientific references for field fertilizer application in the future.
Tissue Culture of Zoysia matrella and the Establishment of Asexual System
LI Guo-ping, YANG Lu-sheng, HU Wen-ying, HUANG Qun-ce
2005, 18(5): 541-545.
Abstract:
The paper dealt with the studies on the tissue culture and the establishment of asexual system of Zoysia matrella.Two kinds of asexual system were established successfully based on careful studies on the methods and major factors for induction,differentiation and propagation of tufted shoots and calli.One asexual system was maintained through tufted shoots regeneration,using top buds of rhizome of Zoysia matrella as explants,MS + 6-BA 2mg·L-1 + NAA 0.1 mg·L-1 as the effective medium for adventitious shoot induction and MS + KT 3mg·L-1 + NAA 0.1 mg·L-1 as the suitable subculture medium for adventitious shoot propagation.Another asexual system was maintained through callus induction and differentiation,using the base of tufted shoots as explants,MS + 2,4-D 4 mg·L-1 as the optimum medium for callus induction and MS basic medium as the effective medium for differentiation in callus.And the plantlets got acclimatized well,with the survival rate up to 95%.Establishment of asexual system laid a solid foundation for further studies on breeding by means of somaclonal variation and Agrobacterium-mediated genetic transformation.
Study on Organogenesis of Liriodendron chinense×L.tulipifera
TIAN Min, LI Ji-yuan, FAN Zheng-qi
2005, 18(5): 546-550.
Abstract:
The organogenesis systems of Liriodendron hybrids were established by using the leaves,petioles,stem fragments and basal shoot fragments as explants.The results indicated that the callus could be induced from these explants on the inductive media,and the basal shoot fragment had the highest callus-inducing rate.The calli differentiated into shoot bud on the differentiation media MS+6-BA 2.0 mg·L-1+NAA 0.5 mg·L-1 and MS+6-BA 4.0 mg·L-1+NAA 0.5 mg·L-1,and some explants directly differentiated into shoot on the medium MS+6-BA 4.0 mg·L-1+NAA 0.5 mg·L-1.The organogensis systems offered base for the molecular breeding.
Study on the Photosynthetic Dynamic Variation of Phyllostachys edulis
SHI Jian-min, GUO Qi-rong, YANG Guang-yao
2005, 18(5): 551-555.
Abstract:
Using Li-6400,the photosynthetic dynamic variation of Phyllostachys edulis was determined in deferent time scales.Meanwhile,the annual variation of chlorophyll content was studied.The results showed the diurnal variation of net photosynthetic rate(Pn) changed with season,bimodality in summer and autumn,and single peak curve in winter and spring.Stoma partly shut was the chief reason for photosynthetic midday depression in summer and autumn.The annual variation of photosynthesis followed a three-peak curve,peaks occurred in March,June and August,and the annual mean of Pn was 6.03 μmol·m-2·s-1.The annual variation of chlorophyll content was bimodality,peaks occurred in February and October,and the annual mean of chlorophyll content was 2.18 mg·g-1.Comparing this paper's results with others,the author presumed the different climates and different study methods were the chief reasons that probably resulted in discrepancies in those study results.
Modelling Distributions of Distances to Nearest Neighbors
WANG Han-min, HUI Gang-ying
2005, 18(5): 556-560.
Abstract:
The distribution of distances is one of the characteristics of forest spatial structure and as a basis for application of individual tree growth models,for recovery of forest spatial structure and for visualization of forest stands.The study presented a new method for modelling distributions of distances to the nearest neighbours.The distribution of distances follows the Weibull distribution.The Weibull distribution function with only 2 parameters is sufficient for describing nature forest structures.The method is a precondition for further estimation for the distributions of tree-tree distances with very little effort as part of a normal forest inventory.
Growth Response of Sequoia sempervirens Seedlings to N Nutrients
BAI Shang-bin, WANG Yi-xiang, ZUO Xian-dong, RAO Long-bing
2005, 18(5): 561-566.
Abstract:
In this paper,the growth response of one-year-old Sequoia sempervirens seedlings to N nutrients level was studied in a six-month period.In greenhouse, the plants were sand-cultured in pots supplied with various N mass concentration(0,0.05,0.11,0.16,0.21,0.32,0.42 and 0.63 g·L-1,0.21 g·L-1 as control).The results suggested:(1)When the seedlings were supplied with normal levels of nitrogen,they grew well and their net increase heights were 31.2 cm;when they were supplied with less nitrogen as 0.11,0.05 amd 0 g·L-1,or oversupplied with nitrogen as 0.63 g·L-1,they grew slowly and their net increase heights were 92.6%,83.0%,29.8% and 70.8% of those supplied with normal nitrogen respectively.(2)When supplied with less N nutrients,the seedlings changed below-ground and above-ground biomass by regulating partitioning of photosynthates between them.Deficient nitrogen supply caused increments of biomass partitioning to roots in order to increase root growth and the ratio was 56%.When the seedlings were oversupplied with nitrogen,and the ratios of below-ground to whole biomass evidently decreased.(3)Under the conditions of less nitrogen,the specific root length of the seedlings fine roots significantly increased,helpful for the seedlings to absorb more nutrients and water.It was 14.9 m·g-1,when supplied with 0 g·L-1.When oversupplied with nitrogen as 0.63 g·L-1,their specific root length was 6.0 m·g-1.
Variation of Wood Qualities along Tree Height and Growth and Correlation Analysis of Multiple-traits in Poplar Hybrid
LI Jin-hua, ZHANG Qi-wen
2005, 18(5): 567-572.
Abstract:
Three clones of 2-,4-,5-,6-,7-,9-and 12-year-old of Populus × euramericana cv.'N2136'were randomly selected from plantations grown at the spacing of 3 m×4 m from Jianping County in Liaoning Province.For each clone,5 cm disks were taken from 40 cm,1/2 and 2/3 heights for measurement and analysis for basic density,fiber length,and ratio of wideness to space and 1% NaOH extractant of wood.Their heights,DBHs and diameters on 1/3 and 2/3 whole height were also measured and analyzed.The results showed that there existed significant difference of four wood qualities among clones of different ages.It also proved that the interaction between age and height of wood qualities did not exist or was not significant.Although no uniform trend in the changes of all wood qualities at different heights were observed,it was found that all qualities showed increasing or decreasing trends with ages and no clear pattern was indicated.Relationship between the early and the late for wood and growth of was analyzed,which showed relative coefficients between the early and the late were significant.According to the relative coefficients,early selection could be undertaken for wood qualities and growth in late age.It also suggested that early and late utilization of wood should be carried out during 4th-and 12th-year.
Molecular Cloning of Phenylalanine Ammonia-lyase in Ginkgo biloba
CHENG Shui-yuan, DU He-wei, XU Feng, CHEN Kun-song
2005, 18(5): 573-577.
Abstract:
According to the conservative domain of some other plants DNA sequences of PAL gene,a pair of degenerate primer was designed.A special DNA fragment was obtained by PCR amplifying,which length is 862 bp,and it is named Gbpal1.We analysed the nucleotide and amino acid sequence of smilarity to the corresponding gene of other organism,the results showed that Gbpal1 is a partial PAL gene of Ginkgo biloba.The sequence had been embodied in Genebank,and Accession NO.is AY578145.The southern blot analysis indicated that Ginkgo biloba PAL belonged to a multigene family.
Response of Fluorescence Parameters in Detached Leaves of Several Tree Species in HuaBei District to Drought Stress
DUAN Ai-guo, BAO Er-jiang, ZHANG Jian-guo
2005, 18(5): 578-584.
Abstract:
By analyzing the water-holding capacity of detached leaves,change of fluorescence parameters with the extent of water stress and the relationship between fluorescence parameters and water parameters,the response of fluorescence parameters in detached leaves of several tree species in Huabei district to drought stress was discussed.Four main conclusions were drawn as follows :(1)coniferous trees generally had stronger water-holding capacity than broadleaf trees,their water-holding mechanism,however,were quite different;(2)the length of water-losing time essentially affected the change of fluorescence parameters,and during the course of water stress,fluorescence parameters Fv/Fm and Fm/Fo of five coniferous trees had obvious linear relationship with water-losing rate,the difference lied in that the variation curve of parameter Fv/Fm presented a protruding design and parameter Fm/Fo presented a eurve of inverted "S";(3)under different stress extent,the relationship between fluorescence parameters and water parameters showed significant difference,the higher the water stress was,the more significant the correlationship was;(4)fluorescence parameters could give a qualitative description for drought-resistant quality of tree,but as a quantitative index,they showed some extent of limitations.
Development and Application of Immunomagnetic Separation ELISA for Identification of Bursaphelenchus xylophilus in Pinewood
CAO Yu, LI Hai-yan, MA Hong-zhou, HU Jia-fu, YANG Wen-bo, WANG Yu-yan, BAI Gang
2005, 18(5): 585-589.
Abstract:
Using dispersion polymerization,polystyrene magnetic micropsheres as carriers were prepared.By coating with rabbit anti-Bursaphelenchus xylophilus(BX) IgG,the immunomagnetic microspheres(IMMS) could specifically capture nematode antigen on pinewood samples.Taking biotinylated Anti-BX rabbit IgG as a tracer antibody,together with horseradish peroxidase labeled avidin,an enzyme-linked immuosorbent assay(ELISA) on IMMS was developed.Three kinds of pine trees harvested from different areas were detected by this method.Although there were a few crossed reactivity between Bursaphelenchus mucronatus antigen with Anti-BX IgG,the relevance ratio of BX on infected pine trees was 94.1% and the detection limit could be 0.1 μg·mL-1 nematode antigen.The result suggested that immunomagnetic separation enzyme-linked immuosorbent assay(IMS-ELISA) could directly capture trace nematode antigen on pinewood homogenizations.The method showed practicability of the quick quarantine inspection for its speediness,convenience and accuracy.
Research on Cultivation Techniques for High and Stable Yield of Olea europaeal
DENG Ming-quan
2005, 18(5): 590-594.
Abstract:
The research on the cultivation techniques for the high and stable yield of olive,conducted at Yuan county of Hubei province,Xichang of Sichuan province and Wudu county of Gansu province from 1988 to 1993,showed that the average 5 year's mean fruit yield of 3 olive varieties(Frantoio,Chenggu No.31 and Chenggu No.32)at the age of 10~14 was 5 066.3 kg·hm-2·a-1,which was 3.6 times as high as that of the control.Meanwhile,the criteria of soil physical and chemical properties were offered for the high and stable yield of the olive fruit,and the related integrated cultivation measures,such as soil moisture and fertility management,tree shaping and pruning were recommended.
Research on Artificial Cultivatation of Kalimeris indica
LIU Xin-hong, LIU Yue-jun
2005, 18(5): 595-600.
Abstract:
The research result showed that Kalimeris indica seeds couldn't be stored in the normal temperature for more than 7 months after harvesting,Using the stored seeds in the normal temperature to sow,the best season was 5~7 months after seeds harvesting,i.e.the next spring,the average seedling growing could reached 364 plants·m-2.It could be harvested for 11 times in establishment cultivation that means it could be harvested for every 33 days in average,While cultivating in the open field,it could be harvested for 9~10 times in a year,harvesting in all year round establishment cultivation was more than 1~2 times than that in the open cultivating field,the average harvesting time is shortened for 2~7 days.The average yield in the establishment cultivation reached 9.12 kg·m-2,it was 79% higher than that in the open cultivated field in average which was 5.09 kg·m-2.The leaves and stems of Kalimeris indica cultivated in establishment were more delicate,fresh,green,less acerb,higher rate of edibility,Kalimeris indica leaves and stems cultivated in the open field were older,coarse,high flavor of acerbity,less rate of edibility.The annual average net income cultivating in establishment was 15.03 yuan·m-2,it was 2.7times than that cultivated in the open field which was 5.66 yuan·m2,Among the 8 treatments,the treatment A1×B2 was the best,the output reached 11.28 kg·m-2,the annual net income was19.3 yuan·m-2,the rate of investment and output was 1∶3.3;The next was A1 × B1,the output reached 9.07 kg·m-2,the annual net income was 15.3 yuan·m-2,the rate of investment and output was 1∶3.1.
Ornamental Tree Sources and Their Diversity and Economic Value in Baishilazi National Nature Reserve
ZHOU You, GUO Yuan-tao, QU Zai-chun, DING Yun-rui, QIU Cheng-ping, YUAN Yong-xiao, YU Jun-lin
2005, 18(5): 601-608.
Abstract:
Based on 15-year's investigation,it was found that there were 142 species of ornamental tree species belonging to 74 genera of 36 families,including 11 endangered tree soecies under national protectdion which accounted for 7.75 % of the total tree species in the nature reserve.From the viewpiunts of ornamental characters,the flower plants,fruit plants and foliage plants took the percentages of 45.07 %,59.15 % and 33.80 %of the toral respectively.From the viewpoints of ornamental usage,the plants for garden landscape,potted landscape and shrub bedding took the percentaged of 40.30 %,37.83 % and 33.10 % of the total respectively.Abour 69.90 % of the tree species were of the type of northern temperate distribution zone.The dominant families were Rosaceae,Caprifoliaceae and Aceraceae,etc.Some other applications of ornamental tree species were also introduced.
Effects of Pruning to Promote Trunk Extension on Annual Growth Dynamic of Paulownia Branches
WANG Bao-ping, LI Ji-yue, SUN Zhi-qiang, WEN Rui-jun, QIAO Jie, Ru Guang-xin, LI Zong-ran
2005, 18(5): 609-614.
Abstract:
In order to know thoroughly the effects of pruning to promote trunk extension on 3-year-old Paulownia relative growth among branche,trunk and leaf,the annual growth dynamic processes of the base diameter Db and base cross section area Sb of branches from single branch to crown layers to the whole tree under 4 pruning treatments and control were measured and analyzed and futher simulated by Richards'functions.The results showed that:(1)the treatment of remaining 3~6 underlayer branches after pruning was optimal for promoting the branch growth.Under this treatment,the annual increments of Db and Sb in the upper crown may reach to 12.16~12.25 cm and 117.550~120.786 cm2,while in the lower crown the former to a mediate level and the latter to 107.748~113.291 cm2,thereby the annual increment of Sb of the whole tree reached to 228.535~230.841 cm2,being much higher than that of the control and other pruning treatments,as a result its total Sb reached to 287.907~294.535 cm2,being little higher than that of the control.(2) All of the annual growth dynamic processes of Db and Sb under treatments and control could be simulated reliably by Richards'function and their parameters of maximum annual increment A,maximum daily increment AGRmax,average daily increment Am,fast-growing period T,growing period Dg,and fast growing point,the initial and final time of fast-growing period were determined and analyzed.The analysis showed that the optimal treatment had relatively longer T and Dg,and maximized AGRmax(or Am) and A of Db in the upper crown which were 230.76%~240.19% and 234.93%~245.46% higher than that of the control,but got a moderate level in the lower crown.Meanwhile,compared with the control,the AGRmax(or Am)and A of Sb were 70.69%~78.78% and 35.85%~41.38% higher in the upper crown,while 105.43%~(127.17%) and 143.46%~155.86% higher in the lower crown,congsequently 61.95%~76.02% and 81.38%~(85.22%) of the whole tree.
Studies on Heterobasidion and Its Control of Root and Butt Rots by the H.annosum Complex
DAI Yu-cheng
2005, 18(5): 615-620.
Abstract:
The Heterobasidion annosum complex are the most aggressive pathogens on coniferous forests in northern hemisphere,and they cause severe damages on many gymnosperm trees:The species complex were considered as a single species,however,three species have been recognized in Europe: Heterobasidion annosum sensu stricto,H.parviporum and H.abietinum.The three species have differences in biological,morphological and ecological characteristics,hosts and distribution.Being controlling the disease of root and butt rots,Phlebiopsis gigantea is the best antagonistic fungus to prevent the Heterobasidion annosum complex.The single-spore cultures of Heterobasidion from northeastern and southwestern China were paired with homocaryons of three European species,and the Chinese stocks mated European H.parviporum only.Heterobasidion annosum and H.abietinum do not exist in China so far,and they should be considered to be in quarantine in China because these two species are important forest pathogens in Europe.
Assessment and Prevention of Invasion Risk in Live Butterfly Releasing
SHI Jun-yi, ZHOU Cheng-li, CHEN Xiao-ming
2005, 18(5): 621-627.
Abstract:
Two steps have been designed to assess the invasion risk of butterfly releasing. Firstly,the authors discussed only on four key factors,i.e.host plants,high temperature in summer and low temperature in winter,and determining if a newly introduced butterfly species could keep alive in a new territory or not.And this is decided by the value of Rc,which is called as risk coefficient.If Rc is equal to 0,it means the introduction of a butterfly species is quite safe,and the adults could be permitted to be released outdoors;if Rc=1,it meas the invasion may take place,so intensive assessment needed to be done.In the second step,a assessment was made on many factors such as host-plant,temperatures in summer and winter,time of generation,speed of expansion spread,etc.,and give each factor a score of risk(X_i).The scores were added together and obtained the total score Sd.The invasion risk of a alien butterfly species could be judged by the value of R,and R = Rc.Sd.If R≥20,live butterflies should not be introduced to the new territory.When 20R≥10,live butterflies should only be permitted to release in an isolated area.If R5,the adults of introduced species could be released into a non natural-protection territory.In the administration of live butterfly releasing,some important measures must be taken to guarantee the safety.
Study on the Behaviour Responses of Monochamus alternatus Hope Adults
ZHAO Jin-nian
2005, 18(5): 628-631.
Abstract:
The results of the study showed that the optimum daily mean temperature that M.alternatus adult's eclosion and leave host trees was 25~26 ℃.Monochamus alternatus adult carring Bursaphelenchus xylophilus,both the longevity and feeding numerical were lower than that of the non-carrier.The phototactic proportion of the population quantity of M.alternatus female and male adults was 1∶1.8.The population quantity proportion of M.alternatus femal and male adults flown to attractant was 1∶1.3.Under controlled condition,when M.alternatus adults 2♂×1♀and 1♂×1♀ reared respectively,for the former,the mean amount of egg deposited was 107.2,while the latter was 153.6.Of the two for non-pit quantity,the former was rather high or than the latter.
Study on Filial Generation of Single Parent in Second-generation Seed Orchards of Chinese Fir
ZHANG Jian-zhong, XU Yong-qin, SHEN Feng-qiang, WU Jia-lü
2005, 18(5): 632-635.
Abstract:
The height and DBH of 5 to 7-year trees of filial generation of single parent were tested and analysed in 1997-1999 in second generation seed orchard of Chinese fir(Cunninghamia lanceolata(Lamb.)Hook) in Changle Forestry Center.The results showed that the growth traits of height and DBH were most significantly different among the tested families.The heritabilities of height and DBH of families different years in were 67.02%、73.41%、54.95%、59.18%、55.48% and 47.37% respectively.The genetic gain of families of plus tree of superior provenance and hybrid match was more than that of the families of plus tree of superior families of first generation seed orchard of Chinese fir.The genetic gain of second generation seed orchard was more than that of the filial generation of superior provenance and mixed families filial generation of first generation and 1 and(1.5) generation seed orchard.The selection was effective on material of second generation of Chinese Fir and the second generation seed orchard rebuilding was successful.
Growth Differences between Six Provenances of Taxus chinensis var.mairei at Seedling and Young Stage
JIAO Yue-ling, ZHOU Zhi-chun, JIN Guo-qing, WANG Yue-sheng, YU Neng-jian
2005, 18(5): 636-640.
Abstract:
Genetic test at seedling and young stage including six provenances in Taxus chinensis var.mairei was conducted in Mingxi of Fujian and Chun'an of Zhejiang.The results indicated that there existed significant differences among provenances for growth performance at seedling and young stage.Among six provenances tested,Youxi provenance and Mingxi provenance possessed the biggest height growth with intensive lateral root system and more branches.Under artificial shading in the nursery,the average tree height of provenances at age two varied form 1.07 m to 1.16 m.The highest one was(8.4%) more than those of the lowest.Correlation analysis demonstrated that growth of tree height and diameter seemed to be independent of branch characters.Youxi provenance and Mingxi provenance were superior provenances with high growth rate,broader crown,more branches,etc.These two provenances could be used for high-yield management with short rotation.Because of more branches and narrow crown,Huaihua provenance of Hunan was also a good provenance with high productivity under large plant density in spite of moderate growth rate.
An Effective Method for Extraction Genomic DNA from Aphids
YANG Zi-xiang, FENG Ying, CHEN Xiao-ming
2005, 18(5): 641-643.
Abstract:
Aphid is a group of small insects in the Homoptera.There are approximately 4 000 aphid species all over the world.Many of them attack important agricultural crops and therefore have economic importance.However,some species such as Chinese gallnut aphids are beneficial for human beings.Most aphids display complex life cycles with alternation of sexual and asexual generations and host plant alternation.Molecular genetic markers have good stabilities,high variability and mostly are free from environmental influences.So they were very suitable for aphid research and could tackle some problems which the traditional taxonomical methods could not solve.The paper introduced a simple and effective method that could extract genomic DNA from a single aphid individual and could be used for the research of molecular genetic marker such as RAPD,RFLP and DNA sequence determination.