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作物学报 ›› 2008, Vol. 34 ›› Issue (01): 8-16.doi: 10.3724/SP.J.1006.2008.00008

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

大豆对豆卷叶螟Lamprosema indicata (Fabricius)抗性的遗传分析

邢光南;赵团结;盖钧镒*   

  1. 南京农业大学大豆研究所 / 国家大豆改良中心 / 作物遗传与种质创新国家重点实验室, 江苏南京 210095

  • 收稿日期:2007-05-29 修回日期:1900-01-01 出版日期:2008-01-12 网络出版日期:2008-01-12
  • 通讯作者: 盖钧镒

Inheritance of Resistance to Lamprosema indicata (Fabricius) in Soybean

XING Guang-Nan,ZHAO Tuan-Jie,GAI Jun-Yi*   

  1. Soybean Research Institute of Nanjing Agricultural University / National Center for Soybean Improvement / National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing 210095, Jiangsu, China

  • Received:2007-05-29 Revised:1900-01-01 Published:2008-01-12 Published online:2008-01-12
  • Contact: GAI Jun-Yi

摘要:

豆卷叶螟是我国南方大豆的主要食叶性害虫之一, 危害严重。本文在观察豆卷叶螟田间发生情况及其在大豆上特殊的卷叶危害特征基础上, 以虫包数、卷叶率、子粒产量为抗性(危害)指标, 应用3个抗感杂交组合[科丰1号×南农1138-2(NJRIKY)、皖82-178×通山薄皮黄豆甲(NJRIWT)和苏88-M21×新沂小黑豆(NJRISX)]衍生的重组自交系群体, 在田间自然虫源条件下于2004—2006年对大豆抗豆卷叶螟的植株反应进行了抗性鉴定。各类指标在各群体均表现有相当大的遗传变异和遗传率, 其中卷叶率指标比其他2类指标遗传变异和遗传率相对较大, 年度间更稳定且与产量的负相关更明显, 因而提出9月上旬卷叶率为鉴定大豆对豆卷叶螟抗性的最佳指标。对NJRIKY、NJRIWT和NJRISX 3个群体抗性遗传分离分析的结果一致表明, 大豆对豆卷叶螟抗性符合2对主基因+多基因的混合遗传模型, 主基因遗传率分别为51.0%、80.5%和56.3%, 多基因遗传率分别为39.1%、11.4%和29.1%。2对主基因的作用方式表现组合间有差异。在此基础上对群体各家系的主基因基因型作了归类, 可供家系抗性选择参考。

关键词: 大豆, 豆卷叶螟, 抗虫性, 主基因+多基因混合遗传模型, 分离分析

Abstract:

Bean pyralid (Lamprosema indicata Fabricius) is one of the major leaf-feeding insects for soybeans and causes serious damage in soybean production in central and southern China. The objective of the present study was mainly to reveal the inheritance of resistance to L. indicate in soybeans using three recombinant inbred line (RIL) populations derived from susceptible by resistant crosses, i.e. NJRIKY, NJRIWT and NJRISX (derived from Kefeng 1 × Nannong 1138-2, Wan 82-178 × Tongshanbopi-huangdoujia and Su 88-M21 × Xinyixiaoheidou, respectively) in the field under natural infestation. Based on the observation of symptoms damaged by the insect on soybeans, rolled leaf percentage, rolled leaf number, and seed yield were examined as resis-tance (damage) indices. Among them, the rolled leaf percentage tested in early September was the best index of resistance to L. indicata due to its higher genetic variation, heritability value and environment-stability, as well as higher negative correlation with seed yield in the three populations. Segregation analyses showed that resistance to L. indicata was dominated by two major genes plus polygenes in the three populations, with their major gene heritability of 51.0%, 80.5%, and 56.3%, and polygene heritability of 39.1%, 11.4%, and 29.1%, respectively. The major gene genotypes of the RILs of the three populations were determined and grouped according to their posterior probability, which could be utilized as reference in selection for resistance lines.

Key words: Soybean, Lamprosema indicata (Fabricius), Resistance to insects, Major-gene plus polygenes mixed inheritance model, Segregation analysis

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