光敏核不育水稻短日照植株的雄性器官和育性异常  

Abnormality in Male Organ Development and Fertility of Photoperiod- sensitive Genic Male Sterile Rice Plants Under Short Day Condition

作　　者：张锐[1] 薛光行[1] 宋家祥[2] 蒋希文[2] 

机构地区：[1]中国农业科学院作物育种栽培研究所,北京100081 [2]中国农业科学院研究生院,北京100081

出　　处：《Acta Botanica Sinica》1999年第12期1317-1322,共6页Acta Botanica Sinica（植物学报：英文版）

摘　　要：采用形态学方法比较观察了 10个水稻 (OryzasatavaL .)雄性核不育系的雄性器官的发育状况 :1)雄性核不育系短日照植株的自交结实率和花粉可育度均显著低于对照 ;2 )程度不同地存在花药开裂和散粉障碍 ,有多寡不等的柱头无任何花粉附着 ,且附着在不育系柱头上的花粉萌发力弱 ;3)胚囊发育状况及异交结实率均未见异常。说明光敏核不育水稻短日照植株自交结实率低下乃因雄性核不育基因表达所致。Tenphotoperiod_sensitivegenicmalesterilerice (PGMSR)lineswerestudiedtoobservethedevel opmentofmaleorgansoftheirshortday (SD)plants .Theresultswereshownasfollows :1)Theselfseed_set tingrateandthepercentageoffertilepollenofthesePGMSRlinesweremuchlowerthanthoseofthecontrols . 2 )Allthemalesterilelineplantshadvariantbarriersinantherdehiscingandpollenscattering .Inaddition , someoftheirstigmasweredevoidofpollen ,andsomeselfpollengrainsontheirstigmasgerminatedweakly . 3)Femalefertilityofthoseplantswasbelievedtobenormalthroughobservationintheirembryosacdevelop mentandcrossseed_settingrate .Theauthorsdeducedthatthemalesterilegeneexpressionbecomesthemajor factorforlowrateofselfseed_settingofPGMSRplantsunderSDcondition .

关 键 词：雄性核不育 水稻 短日照 自交结实率 形态学 

分 类 号：S511.01[农业科学—作物学] Q949.714.2[生物学—植物学]