| 大麦若干经济性状的遗传特性分析 |
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| 引用本文： | 杜春光,杜连仲.大麦若干经济性状的遗传特性分析[J].华北农学报,1991,6(4):6-11. |
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| 作者姓名： | 杜春光 杜连仲 |
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| 作者单位： | 西南农业大学生物部 重庆630716
(杜春光,李正玮,何立人,何丽玫),河南省农业科学院粮食所 郑州450002(杜连仲) |
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| 摘 要： | 按Hayman方法对8×8完全双列杂交F_1的6个性状进行基因效应分析与模型检验,株高、穗长、实粒数符合加性-显性模型.株高、实粒数为部分显性,加性方差和显性方差均显著,基因的加性效应比显性效应更重要;穗长为超显性,显性基因效应比加性基因效应更重要.对杂交F_1、F_2进行配合力效应值分析表明,一般配合力方差和特殊配合力方差对所研究性状均重要,多数性状为加性基因效应占主导.亲本85G63、81-18、82-14为最佳配合者,其主要经济性状一般配合力好.杂交F_1各性状均有明显杂种优势,组合间和性状间的优势具有显著差异,以单株籽粒产量优势最强,其余依次为实粒数、穗长、株高、小穗粒数和千粒重.
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| 关 键 词： | 大麦 经济性状 配合力 遗传 |
Specific Genetic Trait Analysis of Some Economic Characters in Barley |
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| Du Chunguang Li Zhengwei He Liren He Limei.Specific Genetic Trait Analysis of Some Economic Characters in Barley[J].Acta Agriculturae Boreali-Sinica,1991,6(4):6-11. |
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| Authors: | Du Chunguang Li Zhengwei He Liren He Limei |
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| Abstract: | A eight-parent diallel cross of barley (Hordeum distichum L.) was investigated for six economic traits in two years(1987, 1988). Each kind of gene effects and model test were estimated by Hayman's method.Only plant height, spike length, fertile spikelets were adequate to "additive-dominance" model. Plant height and fertile spikelets were partial dominance, additive effect of genes was more important than that of dominance. Dominance gene effect of spike length was higher than that of additive. Combining ability effects were estimated over generation (F1 & F2). Both GCA and SCA variances were important for all the studied characters. However, the preponderance of additive gene effects was noted for the most traits. The parents 85G63, 81-18 82-14 having high GCA effects for the majority of yield components were considered as best general combiners. All characters of F1 had obvious hete-rosis and it varied with crosses and traits. Heterosis of grain yield per plant was the biggest, the rest, in sequence, were fertile spikelets, spike length, plant height, spikelets per spike, 1000-kernel weight. |
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| Keywords: | Barley Model test Combining ability Heterosis |
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