生态核不育大麦的育性研究  

STUDY ON FERTILITY OF ECO-SENSITIVE GENIC MALESTE STERILE BARLEY

作　　者：周发松[1] 朱旭彤[1] 程鹏飞[1] 王前和[1] 谢志雄 

机构地区：[1]华中农业大学农学系,武汉市东西湖农科所

出　　处：《华中农业大学学报》1994年第3期241-245,T001,共6页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金;湖北省自然科学基金

摘　　要：生态核不育大麦是武汉市东西湖农科所选育的由核基因与环境条件互作而致的雄性不育材料。我们对该材料在不同播期下的育性表现及其雄性不育特征进行了研究。结果表明：生态核不育大麦选系９２１１在武汉市正常播期播种（１０月２０日）和早播（１０月１０日）条件下，表现为高度雄性不育，不育度分别为９８．９７％和９９．９６％；晚播（１１月１９日）条件下，则表现为部分可育，结实率为４８．５２％。不育花粉可分为典败、圆败和染败３种类型，其中以典败为主，占９９．８２％。１０月２０日播种，常规密度下，９２１１主穗和分蘖均表现高度雄性不育，主穗与分蘖的各项育性指标没有显著差别；但稀植条件下，晚生分蘖的花粉典败率比主穗明显下降，结实率相应上升。Eco-sensitive genic male sterile barley was screened from a barley population irradiated with Co￣(60)and its male sterility is resulted from interaction between genic and ecological factors.The male sterility of the mutant was studied in the present study by sowing seeds in different dates.It was shown that the barley was highly male sterile when sown on Oct.20 and Oct.10,with the percentage of sterile pollen 98.97 and 99.96 respectively.When sown on Nov.19.it was partial fertile,the seed setting being 48.52%.The sterile pollens can be resorted into three catogeries based on rcaction to I_2-KI solution:typical abortion,spherical abortion and stained abortion.The typical abortion accounted for 99.82% of the sterile pollens.When the barley was sown on Oct.20 with normal seeding rate,panicles on both main head and tillers were highly male sterile.There was no significant difference between these two types of panicles in the fertility indexes investigated.However,when the barley was sown sparsly,the percentage of the typical sterile pollens of the late born tillers was much lower than that of the main head.The seed setting of the former was higher than that of the later.

关 键 词：大麦 生态核不育 育性 

分 类 号：S512.303.5[农业科学—作物学]