...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Sabrao Journal of Breeding and Genetics >GENETICS OF RESISTANCE TO SPOT BLOTCH, Bipolaris sorokiniana, IN BREAD WHEAT
【24h】

GENETICS OF RESISTANCE TO SPOT BLOTCH, Bipolaris sorokiniana, IN BREAD WHEAT

机译：面包小麦中对斑斑病的抵抗力遗传学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An experiment was conducted to determine the nature and number of genes for resistance to spot blotch (Bipolaris sorokiniana) in three genotypes of wheat (Triticum aestivum L.) Viz, PBW 343, PBW 373 and WH 581. Evaluation of all parents i.e., parent 1(P_1), parent 2 (P_2), and the four generations viz., first filial generation (F_1), second filial generation F_2, backcross generation 1 (BC_1) and backcross generation 2 (BC_2) of these nine crosses was carried out under artificial epiphytotic conditions in the field. The F_1 hybrids between resistant and susceptible parents, namely, UP 2338, PBW 154 and Sonalika were resistant to spot blotch. Appearance of resistance in F_1 indicated that resistance is dominant over susceptibility. The F_2 population derived from seven of these nine crosses segregated in a ratio of 15:1 (resistant: susceptible) for spot blotch reaction showing that resistance is conditioned by two dominant genes with duplicate gene interaction. On the other hand, 9:7 (resistant/susceptible) ratio in F_2 populations of two crosses (UP 2338 x WH 581 and Sonalika x WH 581) indicated complementary gene interaction. The backcross progenies with susceptible parents in each cross segregated into 3 resistant: 1 susceptible as expected further confirming the hypothesis.
机译：进行了一项实验以确定三种基因型小麦（Triticum aestivum L.）Viz，PBW 343，PBW 373和WH 581对斑点斑点（Bipolaris sorokiniana）的抗性基因的性质和数量。评估所有父母，即父母分别进行了这9个杂交的1（P_1），亲本2（P_2）和四个世代，即第一子代（F_1），第二子代F_2，回交世代1（BC_1）和回交世代2（BC_2）。在野外人工条件下。抗性亲本和易感亲本之间的F_1杂种，即UP 2338，PBW 154和Sonalika对斑病具有抗性。 F_1中出现抗药性表明抗药性高于药敏性。来自这9个杂交中的7个的F_2群体以15：1的比例分离（抗性：易感），以进行斑点印迹反应，显示抗性受具有重复基因相互作用的两个优势基因的调节。另一方面，两个杂交的F_2群体（UP 2338 x WH 581和Sonalika x WH 581）的9：7（抗性/易感性）比率表明互补的基因相互作用。在每个杂交中具有易感亲本的回交后代被分成3个抗性：预期为1个易感，进一步证实了这一假设。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号