[1]唐镇教.美洲黑杨南方种源的遗传变异[J].南京林业大学学报(自然科学版),1990,14(03):015-21.[doi:10.3969/j.jssn.1000-2006.1990.03.004]
 Tang Zhenmin.GEOGRAPHIC VARIATION AND GENETIC PARAMETERS OF COTTONWOOD FROM THE SOUTHERN UNITED STATES[J].Journal of Nanjing Forestry University(Natural Science Edition),1990,14(03):015-21.[doi:10.3969/j.jssn.1000-2006.1990.03.004]
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美洲黑杨南方种源的遗传变异
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
14
期数:
1990年03期
页码:
015-21
栏目:
研究论文
出版日期:
1900-01-01

文章信息/Info

Title:
GEOGRAPHIC VARIATION AND GENETIC PARAMETERS OF COTTONWOOD FROM THE SOUTHERN UNITED STATES
文章编号:
1000-2006(1990)03-0015-07
作者:
唐镇教
南京林业大学林学系
Author(s):
Tang Zhenmin
Department of Forestry
关键词:
美洲黑杨地理种源遗传变异
Keywords:
Cottonwood Geographic seed sources Genetic variation
DOI:
10.3969/j.jssn.1000-2006.1990.03.004
文献标志码:
A
摘要:
<正>本文对美洲黑杨15个南方地理种源进行了种源—子代测定。5年试验结果表明,不同地理种源对树高、胸径和树干通直度的总变异分别占64%、21%。同一种源的不同林分对树高、胸径和通直度总变异无显著影响。树高、胸径和通直度随着种源经度由东向西而增大,但随着种源纬度由北向南,只有树高生长相应增大。各性状的狭义遗传力较低,由于非加性方差很小,广义遗传力仅略大于狭义遗传力。通过种源—子代测定而建立的插穗生产区,树高和胸径的遗传增益比实生种子园高6~7%;树于通直度的遗传增益比实生种子园高2%。树高与胸径之间的遗传相关高达0.9以上,而树干通直度与树高或胸径的相关性很小(0.01~0.31)。
Abstract:
Fifteen geographic seed sources of eastern cottonwood (Populus deltoides Bartr.) from the southern United States were used in a provenance-rogeny-lonal test in western Mississippi. Eighty percent of the genetic variation among clones in fifth-ear height resulted from geographic genetic variation. Sixty-our percent of genetic variation in fifth-ear DBH and 21 percent of the variation in stem straightness were likewise associated with geographic differences. No genetic variation was observed among local stands within source in any of these traits. Height, DBH, and straightness all increased from eastern to western origins but only fifth-year height increased from northern origins to southern origins.Narrow-ense hcritabilitics were low, ranging from 0.01 to 0.11 on an individual-ree-within-ource basis. Estimates of non-dditive genetic variance were so small that broad-sense hcritabilitics were only slightly larger than narrow-sense hcritabilities. A cutting production area would give about six to seven percent more genetic gain in fifth-year height and DBH than would give a seedling seed orchard, and about two percent more gain in straight-ness. Genetic correlations between height and DBH were postive and near 10, while the correlations between straightness and those growth traits were low, ranging from 0.01 to 0.31.

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更新日期/Last Update: 1900-01-01