摘要
通过对12个水稻 F_1杂种和2个品种的稻穗构成因子研究表明:在诸个稻穗构成因子中,主穗小穗数,一次枝梗数的遗传力最高;与主穗小穗数呈极显著遗传正相关的稻穗构成因子是一次枝梗数和二次枝梗数;一次枝梗数的通径系数最大,所以,它对主穗小穗数的直接效应最大.根据试验结果,以一次枝梗数多且配合力好的基因型作亲本,容易获得大穗型的杂种一代.
Having studied the panicle structure of 14 entries,it is reported that among the paniclecomponents,the number of spikelets on the main panicle (Tsp) and of primary branch (PB)had the highest heritability.A significant positive correlation between Tsp and PB,also be-tween Tsp and the number of secondary branch (SB) was found.PB had a greater direct ef-fect on Tsp than any other panicle components.Therefore the large-panicle type of ricehybrids could be bred by using genotypes with more PB and good combining ability of PBas parents.
出处
《江西农业大学学报》
CAS
CSCD
1993年第A01期62-66,共5页
Acta Agriculturae Universitatis Jiangxiensis
关键词
水稻
稻穗结构
遗传
杂交稻
Rice
Panicle structure
Genetic correlation
Path analysis
