水稻品种对美国稻瘟病小种IB-33、IB-45和IE-1的抗性遗传(英文)

Inheritance of Resistance to Blast Races IB-33,IB-45 and IE-1 of Pyricularia grisea in Rice Cultivars of the United States of America

1995年 10月至 1997年 11月 ,在美国阿肯色大学水稻研究推广中心 ,用水稻品种LA110和Jasmine 85与水稻品种Teqing、Katy、Mars、LaGrue和Newbonnet进行不完全双列杂交 ,对其杂交后代和亲本用美国 3个主要稻瘟病菌小种 (以下简称小种 )IB 33、IB 4 5和IE 1进行接种鉴定和遗传分析研究。结果表明 :亲本LA110、Jasmine 85、Teqing抗所有 3个小种。Katy抗小种IB 4 5和IE 1,感小种IB 33。Mars抗小种IE 1,感小种IB 33和IB 4 5。LaGrue感所有 3个小种。Newbonnet抗小种IB 4 5 ,感小种IB 33和IE 1。所有抗病亲本的抗病基因 ,其F1分别对相应小种呈现显性抗病性。抗病亲本杂交 ,LA110与Jasmine 85对小种IB 33,LA110与Teqing、Jasmine 85对小种IE 1,及Jasmine 85与Teqing对小种IE 1,是等位的抗病基因。LA110与Teqing对小种IB 33,及Jasmine 85与Teqing对小种IB 33,分别存在三对独立遗传的显性抗病基因。LA110与Teqing、Katy、Newbonnet、Jasmine 85对小种IB 4 5 ,Jasmine 85与Teqing、Katy、Newbonnet对小种IB 4 5 ,LA110与Katy、Mars对小种IE 1,Jasmine 85与Katy、Mars对小种IE 1,分别存在两对独立遗传的显性抗性基因。抗病亲本LA110或Jasmine 85与感病亲本Mars对小种IB 33,抗病亲本LA110与感病亲本Mars对小种IB

The Researches were conducted with a non complete diallel of 22 crosses between one group of rice cultivars LA110, Jasmine 85 and another group of rice cultivars Teqing, Katy, Mars, LaGrue, Newbonnet to identify the inheritance of rice blast ( Pyricularia grisea ) resistance to three rice blast races IB 33, IB 45 and IE 1 of the USA. The parents, F 1 and F 2 were tested for their resistance to these races in the greenhouse at Stuttgart, Arkansas in the USA during October 1995 to November 1997. Parents LA110 and Jasmine 85 in the first group were resistant to all races. Teqing in the second group was resistant to all the three races. Katy was resistant to two races IB 45 and IE 1. Mars was only resistant to IE 1. LaGrue was susceptible to all the three races. Newbonnet was susceptible to two races IB 33, IE 1. The resistance was controlled by dominant genes to all races and all F 1 were resistant to all the three races. There were allelic genes to race IB 33 in the crosses between resistant parent LA110 and resistant parent Jasmine 85, and to race IE 1 in the crosses between LA110 and resistant parent Teqing or Jasmine 85, and also to race IE 1 in the crosses between Jasmine 85 and Teqing. It might be three dominant resistance genes to race IB 33 in the crosses between LA110 or Jasmine 85 and Teqing. The resistance was controlled by two dominant independent resistance genes to race IB 45 in the crosses among resistant parents LA110 and Teqing, Katy, Newbonnet or Jasmine 85, and also to race IB45 in crosses among resistant parents Jasmine 85 and Teqing, Katy or Newbonnet; and to race IE 1 in the crosses between resistant parents LA110 and Katy or Mars; and also to race IE 1 in the crosses between resistant parents Jasmine 85 and Katy or Mars. It might be two dominant complementary resistance genes controlling inheritance to race IB 33 in the crosses between resistant parent LA110 or Jasmine 85 and susceptible parent Mars; and also to race IB 45 in the crosses between LA110 and Mars. The resistance could be controlled by a single dominant resistance gene to race IB 33 in the crosses between LA110 or Jasmine 85 and susceptible parent Katy, LaGrue or Newbonnet, and to race IB 45 in the crosses between LA110 and susceptible parent LaGrue, and to race IB 45 in the crosses between Jasmine 85 and susceptible parent Mars or LaGrue; and to race IE 1 in the crosses between LA110 or Jasmine 85 and susceptible parent LaGrue or Newbonnet. The inheritances were the same between the cross of two parents and their reciprocal. It was discussed to use 3 resistant cultivars of LA110, Teqing and Jasmine 85 in rice breeding for resistance to blast in the southern part of the USA.