摘要
为探索水稻叶片形态因子在F1代的遗传规律,以4个光温敏核不育系和10个常规水稻品种(品系)为亲本,采用NCⅡ设计,杂交获得40个杂种F1,于乳熟期测定了剑叶的7个叶片形态因子,分析了F1剑叶叶片形态因子的基因型方差来源及其对性状的贡献率。结果表明:7个叶片形态因子的广义遗传力大小依次为:宽度>面积>比叶重>长度>叶面曲率>着生角>披垂角。其中叶片长度、宽度、面积、比叶重和叶面曲率的广义遗传力大于0.5,在F1代呈现较高遗传力;叶宽和比叶重的基因作用主要表现为加性效应;叶长、叶面积和叶面曲率的基因作用则主要表现为显性效应;着生角加性效应显性效应相当;披垂角的广义遗传力最低(0.277),环境效应则最高(0.723),表明F1叶片披垂角主要受栽培条件等环境因子的影响。根据叶片形态因子在F1代的遗传规律和超级杂交稻的高产株型要求,提出了杂交稻育种中有关叶片形态因子的双亲选择策略。
The purpose of this study was to prove the heritability of leaf morphological factors at F1, and to promote hybrid rice breeding with a strategy for parents selection. By using four environment-sensitive genie male sterility lines （ EGMS）, 10 rice cuhivars and 40 F1 s made by the NC Ⅱ design, seven morphological factors of flag leaf, i.e. leaf length and width, leaf area, leave angle and drooping angle, leaf blade curvature and specific leaf weight （SLW） were measured or calculated for F1 and their parents at milking stage. The results indicated that the heritability of the 7 morphological factors of flag leaf showed an order of leaf wide 〉 area 〉 SLW 〉 length 〉 blade curvature 〉 angle 〉 drooping angle. The heritability of leaf length and width, leaf area, SLW and leaf blade curvature were higher than 0. 5. Leaf length, area, and blade curvature were mainly controlled by dominant gene effect, while additive gene effect in leaf width and SLW. Leave angle and drooping angle showed lower heritability, and controlled by both additive and dominant gene effects. Drooping angle showed lowest heritability of 0. 277 and highest environmental effect of 0. 723, which indicated that leaf drooping angle were mainly affected by environmental conditions. According to heritability of the seven leaf morphological factors in F1, a selection strategy for leaf morphology of parents in hybrid rice breeding was put forward.
出处
《江苏农业学报》
CSCD
北大核心
2006年第2期95-99,共5页
Jiangsu Journal of Agricultural Sciences
基金
国家"863"计划项目(2003AA212040)
重大专项(2002AA207001)资助项目
江苏省科技攻关资助项目(BE2001306)
关键词
水稻
叶片
形态
遗传力
flee
leaf
morphology
heritability
