杂交水稻恢复系“HR195”抽穗期的优势表现及基因效应分析  

ANALYSIS OF HYBIRD VIGOR AND GENE EFFECT ON DAYS TO HEADING OF THE RESTORER LINE HR195 IN HYBRID RICE

作　　者：李耘[1] 况浩池[1] 杨乾华[1] 刘国民[1] 刘明[1] 

机构地区：[1]四川省农科院水稻高粱研究所,泸州646100

出　　处：《西南农业学报》1997年第1期18-22,共5页Southwest China Journal of Agricultural Sciences

摘　　要：采用世代平均数分析的多元回归法，对HR195抽穗期的优势表现及基因效应进行了分析，同时探讨了HR195对杂交一代抽穗期的作用及其遗传机理。结果表明，HR195抽穗期表现为迟熟不完全显性，并受到离散早熟基因的影响。在同早熟亲本杂交时，其杂交一代抽穗期以加性效应占优势，同时受到较大的显性效应和上位性效应作用，使F1略偏向晚熟亲本。而同迟熟亲本杂交，F1代抽穗期以显性效应占绝对优势，同时受到一定的加性效应和上位性效应的影响，使F1代表现超早熟现象。利用HR195与早、迟熟不育系组配，其F1代将早熟性和丰产性较好地结合了起来，对建立高产高效农业有重要价值。Gene effect and hybrid vigor of days to heading for the restorer line HR195 in hybrid rice were analyzed using multiple regression of the generation means and the influene of HR195 on the days to heading in F1 and its mechanism were studied.The results showed that the late maturity character of HR195 was partial dominant and influenced by discrete distribution's early maturity and dominant gene. Additive effect was predominant in the F1 hybird between HR195 and the early-heading parents. The dominant and epistatic effects were the influencing factors to make the heading date of the F1 hybird tend to late -maturing parents. But the dominant effects was predominant in the F1 hybrid between HR195 and the late - heading parents, the additive and epistatic effects should not be ignored ; heading date of the F1 hybrid had superiority over earlymaturing parents. The F1 hybrid derived from the crosses of HR195 with the early and late maturing CM lines combined the early maturity with high-yielding ability together. Therefore, HR195 was valuable to the breeding of hybrid rice and the construction of new agriculture with high-yielding ability and high economical profit.

关 键 词：水稻 HR195 抽穗期 杂种优势 基因效应 

分 类 号：S511.035.1[农业科学—作物学]