两系杂交水稻产量性状的相关性及对播期的反应

Corrlation between yield-related factors of two hybrid strain of rice and their response tosowing dates

摘要: 研究了两系杂交水稻主要产量性状间的相互关系及播期对其影响。结果表明，单株产量与单株有效穗、穗粒数、结实率及千粒重呈极显著正相关，结实率对单株产量的直接贡献最大，两者相关性最显著。播期对单株产量、结实率及结实率相对重要性影响较大。而对单株产量与单株有效穗、穗粒数及结实率的偏相关影响较小。

Abstract: Analysis on data of yield and its related factors from two hybrid strains of rice with different sowing dates showed that there was a very significant and positive correlation between grain weight per plant and panicles per plant，spikelets per panicle，seed setting per-centage and 1000 kernel weight．Among those yield-related factors，seed setting percentage produced a strongest effect on grain weight per plant．The effects of sowing dates on phenotype value of grain weight per plant，seed setting rate and path coefficients of seed setting rate were more efective than those on partial correlation coefficients between grain weightper plant and panicles per plaht, total spikelets per panicle and seed setting rate．