早籼稻不育系旭29A的选育  

Breeding of Early Indica CMS Line Xu 29A in Rice

作　　者：颜应成[1] 

机构地区：[1]湖南杂交水稻研究中心,湖南长沙410125

出　　处：《杂交水稻》2007年第2期14-17,共4页Hybrid Rice

基　　金：国家"八五"攻关项目(国85-002-01-02)

摘　　要：旭29A是湖南杂交水稻研究中心用地谷B作母本与金23B杂交,F3代选优良株系与V20A测交并经多代回交转育而成的早籼稻不育系,2000年3月通过湖南省农作物品种审定委员会审定。旭29A株叶型好,播始历期比金23A短1～3 d,比V20A短5～7 d,不育性稳定,花期集中,花时早,午前花比例高,柱头外露率高,柱头活力强,对“九二○”敏感,稻瘟病抗性较强。与金23A相比,旭29A所配组合生育期较短,分蘖力较强,有效穗较多,结实率较高,但每穗总粒数较少,千粒重较低。Xu 29A, developed from the cross and backcross of V20A//（Digu B/Jin 23B） F3 by the Hunan Hybrid Rice Research Center, is a new early-season indica CMS line in flee. It was certified by the Hunan Provincial Crop Variety Appraisal Committee in March, 2001. Xu 29A has a good plant type with its duration from seeding to heading 1 ～ 3 and 5 ～ 7 days shorter than those of Jin 23A and V20A, respectively. It shows a stable and complete male sterility, a relatively centralized blooming period with early blooming, high rates of forenoon blooming spikelets and stigma exsertion , strong stigma vigor, good response to GA3 and better blast resistance. Compared with the hybrids of Jin 23A, the hybrids of Xu 29A show a shorter growth duration, a stronger tillering ability, more productive panicles and a higher seed-setting rate, but fewer spikelets per panicle and lighter grains.

关 键 词：杂交水稻 不育系 旭29A 选育 

分 类 号：S511.03[农业科学—作物学] S334