Provenance Trial and Early Selection of Casuarina glauca in Hainan

MA Ni; ZHANG Yong; ZHONG Chong-lu; JIANG Qing-bin; CHEN Yu; CHEN Zhen; HU Pan; WANG Ren-kai

According to genetic analysis on 6 traits of 4-year-old Casuarina glauca in provenance trial which established in Lin'gao County, Hainan Province, there were significantly differences among height (H), diameter at breast height (DBH), individual volume (VOL), stem straightness(SS) and survival percentage (SP) (pppC. glauca provenances. The genetic correlation among the three growth characteristics, H, DBH and VOL was highly significant, but not among quality traits, SA, SS and SP, which showed that the three quality traits were independent from each other. In another aspect, the coefficient of variation varied from 31.5% (survival percentage) to 91.8% (height). Additionally, the mean genetic gains in the five traits were 2.1%, 1.4%, 2.2%, 0.2%, 0.2% and 6.2% respectively. By means of Smith-Hazel Index Selection and 20% selective ratio, five seedlots, G03, G02, G19, G07 and G25 were screened out as superior provenances for further tree breeding research.

1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China

2. Lin'gao Forest Bureau, Lin'gao 571800, Hainan, China

Received Date: 2013-09-06

Abstract: According to genetic analysis on 6 traits of 4-year-old Casuarina glauca in provenance trial which established in Lin'gao County, Hainan Province, there were significantly differences among height (H), diameter at breast height (DBH), individual volume (VOL), stem straightness(SS) and survival percentage (SP) (pppC. glauca provenances. The genetic correlation among the three growth characteristics, H, DBH and VOL was highly significant, but not among quality traits, SA, SS and SP, which showed that the three quality traits were independent from each other. In another aspect, the coefficient of variation varied from 31.5% (survival percentage) to 91.8% (height). Additionally, the mean genetic gains in the five traits were 2.1%, 1.4%, 2.2%, 0.2%, 0.2% and 6.2% respectively. By means of Smith-Hazel Index Selection and 20% selective ratio, five seedlots, G03, G02, G19, G07 and G25 were screened out as superior provenances for further tree breeding research.

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Reference (19)

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Provenance Trial and Early Selection of Casuarina glauca in Hainan

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通讯作者: 陈斌, bchen63@163.com

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