6个水稻品种广亲和性的比较分析

Comparisons of the Wide Compatibility of Six WCVs in Rice

调查了６个广亲和品种（ＷＣＶｓ）与４个测验种和７个籼稻温敏核雄性不育系（ＴＧＭＳ）杂交Ｆ１、ＷＣＶｓ间杂交Ｆ１及Ｆ２的小穗育性．结果表明；６个ＷＣＶｓ与测验种ＩＲ３６、南京１１号、秋光、巴利拉杂交Ｆ１的小穗育性都在７０％以上，表现亲和；而对７个ＴＧＭＳ的亲和性表现明显差异，不同组合Ｆ１的小穗育性为４３．１％－８８．６％．６个ＷＣＶｓ杂交的１５个Ｆ１中，有１４个Ｆ１的小穗育性在７５％以上，表现正常，但其Ｆ２都分离出不同数量的少数半不育株．组合Ｖａｒｙｌａｖａ１３１２／轮回４２２Ｆ１的小穗育性为５５．２％，Ｆ２群体中可育株与半不育株明显分离，表明这两个ＷＣＶｓ具有非等位的广亲和性基因．

Six wide compatibility varieties (WCVs),Varylava 1312,Guangkangjing 2,Pei C311, Lunhui 422, 02428, CA 529,were chosen to make crosses with each other and with four testers,Nanjing 11 (indica),IR36 (indica), Akihikari (japonica),Balila (japonica) and seven indica thermo-sensitive genic male sterile (TGMS) lines.Spikelet fertilities of all F1s,and of F2s of the crosses among WCVs were observed. The results showed that: six WCVs were compatible to four testers with the normal spikelet fertiities (above 70%) in F1s,but showed different compatibilities to seven TGMS lines as the spikelet fertilities in F1s ranged from 43. 1% to 88. 6%.Fertilities were normal in F1s of the crosses among six WCVs,except Varylava 1312/ Lunhui 422, but segregated slightly in the F2 populations,suggesting that the presence of semisterile plants was the results of the effects of minor genes besides the main genes of wide compatibility. For the cross of Varylava 1312/Lunhui 422,partial sterilities occurred in its F1 with 55. 2% of spikelet fertility,and the significant segregations of fertility were detected in its F2 populations,suggesting that the genes of wide compatibility of these two WCVs were non-allelic.