两用核不育系在江西不同生态点的生育特性及其育性转换分析(Ⅱ)  

ANALYSIS ON DEVELOPMENTAL CHARACTERISTICS AND FERTILITY ALTERATION OF DUAL-PURPOSE GENIC MALE-STERILE LINES(i.e.DGML)IN DIFFERENT REGIONS IN JIANGXI PROVINCE(Ⅱ)

作　　者：贺浩华[1] 刘宜柏[1] 饶治祥[1] 孙义伟[1] 潘晓云[1] 黄英金[1] 

机构地区：[1]江西农业大学农学系

出　　处：《江西农业大学学报》1993年第A01期21-28,共8页Acta Agriculturae Universitatis Jiangxiensis

摘　　要：研究结果表明:8902S 生育期最长、K-9S 其次、W6184S 最短.W6184S 的生育期在不同生态点的差异性最小;8902S 则在同一地点不同播期间变异最小.植株的高度、幼穗的长度、每穗的总粒数均是8902S>K-9S>W6184S,但它们的变异性则刚好相反.提出了两用核不育系育性转换具有不育基因表达的启动温度、不育基因完全表达的临界温度,育性恢复起始温度和育性完全恢复的临界温度四个温度阀值的新观点.核不育基因的表达与育性恢复是一个非常复杂的生物学现象.同时,讨论了核不育系的选育问题.The days of developmental phase of DGML are:8902S>K-9S>W6184S.The varia-bility of developmental phase of W6184S with different regions is the least,but that of8902S is the least-with different sowing dates.The culm height,panicle length and spikeletnumber per panicle are:8902S>K-9S>W6184S.The height of the critical temperature in-ducing full pollen abortion and the minimum temperature of male-sterile gene expressionare:W6184S>K-9S>8902S.The DGML of lower critical temperature of fertility altera-tion and higher minimum temperature of male-sterile gene expression are favourable toseed production and seed reproduction.The expression of male-sterile gene is a complicat-ed biological phenomenon.

关 键 词：生育特性 育性转换 水稻 三系配套 

分 类 号：S511.103.5[农业科学—作物学]