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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (9): 57-60.

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

‘辽粳326×莎莎妮’粳稻杂交后代垩白粒率的遗传分析

詹瞻 王术 王伯伦 贾宝艳 黄元财 马作斌 孙瑞   

  • 收稿日期:2010-11-01 修回日期:2010-12-22 出版日期:2011-04-25 发布日期:2011-04-25
  • 基金资助:

    辽宁省教育厅创新团队项目;教育部重点实验室开放课题

Genetic Segregation Analysis of Chalky Rice Kernel Rate in Japonica Hybridization ‘Liaojing 326×Shashani’

  • Received:2010-11-01 Revised:2010-12-22 Online:2011-04-25 Published:2011-04-25

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摘要：

以2个垩白粒率差异较大的粳稻品种‘莎莎妮’（垩白粒率为2.5%）和‘辽粳326’（垩白粒率为72.3%）的杂交后代F1、F2群体为试材，利用数量性状遗传分析方法，研究北方粳稻垩白粒率的遗传规律。结果表明：（1）垩白粒率的遗传受母体植株的影响较大，在F?2米粒间（着生在F1植株上的米粒）没有发生分离。（2）着生在F?2植株上的米粒的垩白粒率的变异主要是由遗传因素引起的，其遗传模型为2对加性—显性—上位性主基因+加性—显性多基因模型，低垩白表现为显性。（3）主基因遗传力h2mg（%）很大，达到了90.38%，多基因遗传力h2pg（%）只占0.11%，并且存在一对效应很大的主效基因。

关键词: 决定系数, 决定系数

Abstract:

Inheritance of chalky rice rate of north japonica rice was studied by using quantitative character genetic analysis method, with hybrid progenies F1, F2 of ‘Shashani’ (chalky rice rate was 2.5%) and ‘Liaojing 326’(chalky rice rate was 72.3%), which had significant difference in chalky rice rate. The results showed that: (1) chalky rice rate was greatly affected by the maternal plant and no genetic segregation occurs among F2 grains born on F1 plant. (2) The variation of chalky rice rate among grains born on F2 plant was mainly caused by genetic factors, its genetic model was additive-dominance-epistasis major genes additive-dominance polygenes with two major genes, and low chalky rice rate express dominant trait. (3) The heritability of major genes was 90.38% and the heritability of polygenes is 0.11%, and there was a pair of major gene with great effects.