摘要
1987年于贵阳用贵州高原粳与中矮秆粳稻间的17个组合F_1代及7个组合F_2代的研究表明,F_1代抽穗期有中间倾早或超早亲的遗传趋势,在F_2代,抽穗期变异相当大,各组合均有超亲分离现象,表现出数量性状的遗传特点。但抽型期遗传力及遗传进度均达很高水准;双亲平均值和F_1、F_2代抽穗期的回归、相关均显著;表现型变异系数和基因型变异系数相近。试验结果说明,抽穗期的变异主要是遗传控制的。
Experiments were carried out with F1 of 17 cross combinations and F2 of 7 combinations between tall type of plateau local keng rice and semi-dwarf keng rice varieties. The results were summarized as follows.
Heading date of the F1 of 17 combinations were mediate between early and late parents,early heading time in 8 combinatons showed overdominance or dominance, late heading time showed overdominance only in 2 combinations. The F2 of all cross combinations showed transgressive segregation with a successive single peak, double peak or polypeak curve. The inheritance of heading date appeared to be controlled by polygene or by major gene and polygene together. The heritability of heading time in keng rice was very high. Both the phenotypic and the genotypiic coefficients of variance was great, and the difference between those two values was small, as well as the correlation coefficient between F1, F2 heading time and mean value of parents was significant or highly significant. This indicate that the date of heading was mainly controlled by genotype and that sellection for heading time should start from F2.
出处
《贵州农业科学》
CAS
1990年第6期7-12,共6页
Guizhou Agricultural Sciences
关键词
粳稻
性状
遗传分析
抽穗期
变异
Guizhou
japonica rice
heading time
Herosis
inheritance
heritability
