Study on Seed Germ ina ting Character istics AmongD ifferent Combina tion of Ca ta lpa bunge i

WANG Su-ke; WANG Jun-hui; ZHANG Shou-gong; ZHANG Jian-guo; ZHANG Jian-guo; JIAO Yun-de

A mating design, including full-sib and half-sib Cata lpa bungei was conducted. The germination abilitywas studied. The temperature, soaking and lighting time and p retreatment that could influence on Ca talpa bungeiseed germination were studied. The result showed that the difference of germination rate and energy among differentmating combinations was extremely significant. The influence of the individual p lant to the germination rate waslower than that of different variety. The germination rate of the combination C. bungei and C. fargesii was alwayslow. The germination rate and energy of two set of recip rocal crosseswere very similar. The germination rate was thehighest for soaking the seed for 24 hours at a constant temperature of 25 ℃ then germinating it at a changingtemperature 20 - 30 ℃, the difference was remarkable. Another result, an 8-hour-long lighting daily was moreadvantaged for the germination of the seed than that in a comp letely dark condition; the germinating rate of the seedstored at a temperature of 5 ℃ for a week after soaking is also much higher than that stored at a low temperature.

1. Research Institute of Forestry, CAF, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration,Beijing　100091, China

2. College of Forestry and Horticulture, He’nan Agricultural University, Zhengzhou　450002, He’nan, China

3. Forestry ResearchInstitute of Luoyang,Luoyang　471002, He’nan, China

Received Date: 2007-01-17

Abstract: A mating design, including full-sib and half-sib Cata lpa bungei was conducted. The germination abilitywas studied. The temperature, soaking and lighting time and p retreatment that could influence on Ca talpa bungeiseed germination were studied. The result showed that the difference of germination rate and energy among differentmating combinations was extremely significant. The influence of the individual p lant to the germination rate waslower than that of different variety. The germination rate of the combination C. bungei and C. fargesii was alwayslow. The germination rate and energy of two set of recip rocal crosseswere very similar. The germination rate was thehighest for soaking the seed for 24 hours at a constant temperature of 25 ℃ then germinating it at a changingtemperature 20 - 30 ℃, the difference was remarkable. Another result, an 8-hour-long lighting daily was moreadvantaged for the germination of the seed than that in a comp letely dark condition; the germinating rate of the seedstored at a temperature of 5 ℃ for a week after soaking is also much higher than that stored at a low temperature.

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Reference (12)

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Study on Seed Germ ina ting Character istics AmongD ifferent Combina tion of Ca ta lpa bunge i

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