黑龙江省杂交粳稻产量与农艺性状灰色关联分析

在哈尔滨地区对9个杂交粳稻组合材料进行栽培试验,采用灰色关联度分析法对杂交粳稻产量与农艺性状进行关联度分析。结果表明：穗长x4,千粒重x8,株高x1和活动积温x3对产量影响较大;关联度大小顺序为：穗长x4〉千粒重x8〉株高x1〉活动积温x3〉穗数x7〉穗粒数x5〉根干重x2〉结实率x6。说明提高杂交粳稻产量首先应该考虑...

Grey Correlation Degree Analysis between Yield and Agronomic Character of Hybrid Japonica Rice in Heilongjiang Province

Nine materials of hybrid japonica rice were planted in Harbin area,the grey correlation degree analy sis was employed to investigate the relationship between yield and agronomic character of hybrid japonica rice. The results showed that：the main characters such as length x4. thousand seed weight x8. stem length x1 and active accumulated temperature x3 had the closer relation with yield; the relative order of yield and agronomic characteristics was length x4〉 thousand seed weight x8 〉 stem length x1 〉 active accumulated temperature .r3〉spike number x7〉 the number of seeds per ear x5〉 root dry weight x2〉 maturing rate x6. Thus,to en hance yield of hybrid japonica rice should consider the spike length first, then consider increasing thousand seed weight. It needed to strengthen the big spike in the breeding choice to adapt to Heilongjiang area,and en- hance the temperature to promote growth of hybrid japonica rice in cultivation.