不同生态条件下水稻三系不育系G98A的开花习性与异交结实的关系  

The Relationship between Flowering Habit and Outcrossing Seed Setting Rate of G98A(a Rice CMS) under Different Ecological Conditions

作　　者：石邦志 陈文强 周乐良 伍祥 黄云[2] 

机构地区：[1]贵州省水稻研究所,贵州贵阳550006 [2]贵州省遵义市农业科学研究所,贵州遵义563000

出　　处：《贵州农业科学》2009年第1期1-3,共3页Guizhou Agricultural Sciences

基　　金：贵州省"十一五"水稻攻关子专题"三系不育系及超级杂交水稻新组合的选育"[黔科合NZ字(2005)3005-14];贵州省农业科学院专项"大穗型超高产杂交水稻新组合的选育"[院ZX(2006)003];贵州省动植物育种专项"水稻三系不育系G98A繁殖及组合制种技术研究"[黔农育专字(2006)014]

摘　　要：对三系不育系G98A在不同生态条件下的花时、柱头外露率、开颖角度和异交结实率进行了比较。结果表明:G98A在湿热条件下,花时早、开花集中、柱头外露率高、开颖角度增大、异交结实率高,开花习性好,容易使不育系的繁殖和制种取得高产,降低种子的生产成本;在温凉条件下,花时迟、开花分散、柱头外露率降低、开颖角度变小,异交结实率低,开花习性差,不利于不育系的繁殖和制种。The flowering time, stigma exsertion rate, opening spikelet angle and outcrossing seed setting rate of G98A were compared under different ecoIogicaI conditions. The results showed that G98A had the better flowering habit with early flowering time, uniform flowering, high stigma exsertion rate, big opening spikelet angle and high outcrossing seed setting rate under the suitable humidity and temperature condition, which could get high seed yield with a lower cost, and G98A had the bad flowering habit with delayed flowering time, varied flowering, lower stigma exsertion rate, small opening spikelet angle and lower outcrossing seed setting rate under the lower temperature condition, which was not beneficial to its reproduction and seed production.

关 键 词：水稻 三系不育系 开花习性 结实率 

分 类 号：S511[农业科学—作物学]