油菜叶片膨大性状的遗传分析。对(l)Hanelt

Jian-Ming Han, Rui-ling Wang, Y. Cheng, Xue Li, Chao-jun He
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引用次数: 0

摘要

油菜。对(l)榛子在东亚是一种重要的蔬菜。其叶面积是影响单株产量的主要因素之一。为了揭示叶片膨胀的机理,采用多代(P1、P2、F1、B1、B2和F2)联合分离分析方法,对油菜叶片膨胀性状SW-13×L-118组合进行了遗传分析。对(l)Hanelt。结果表明,叶片膨大性状由一对加性显性主基因加性显性上位多基因(D模式)控制。主基因加性效应为-2.3061,显性效应为-1.4525。叶片展开主基因的遗传率B1代为2.56%,B2代为1.55%,F2代为12.12%。该多基因在B1代、B2代和F2代的遗传率分别为54.04%、25.11%和62.60%。结果表明,组合SW-13×L-118的叶膨大性状改良应先发挥多基因效应,在后代中选择是有效的,且存在主基因负加性效应和负显性效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genetic analysis of leaf expansion trait in Brassica rapa L. ssp. chinensis (L.) Hanelt
Brassica rapa L. ssp. chinensis (L.) Hanelt is an important vegetable in eastern Asia. Its leaf area is one of main factor of influencing on the yield of individual plant. To reveal the mechanism of the leaf expansion, the joint segregation analysis of multiple generations (P1, P2, F1, B1, B2 and F2) was used to analyze the genetics of leaf expansion trait in combination SW-13×L-118 of Brassica rapa L. ssp. chinensis (L.) Hanelt. In this paper, the results showed that the leaf expansion trait was controlled by one pair of additive-dominant major genes plus additive-dominant-epistatic polygene (D model). The additive effect of the major gene was -2.3061, the dominant effect was -1.4525. The heritability of major gene of leaf expansion was 2.56% in B1 generation, 1.55% in B2 generation and 12.12% in F2 generation. The heritabilites of the polygene were 54.04% in B1 generation, 25.11% in B2 generation, and 62.60% in F2 generation, respectively. It appeared that the polygene effects should be given prior to the improvement of leaf expansion trait of combination SW-13×L-118, and the selection was effective in later generation, and the negative additive effect and negative dominant effect of major gene were noticed.
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