高原杂交粳稻滇杂35制种产量结构研究*

 通过对高原杂交粳稻滇杂35制种亲本不同栽插行比与产量结构的研究分析结果表明，在栽插密度一致、父母本花期相遇良好的情况下，随着栽插行比增大，单位面积上有效穗逐渐增加，穗实粒数、结实率和花粉密度逐渐降低，父母本不同行比栽插有效穗数之间差异达显著水平，穗实粒数、异交结实率和小区产量之间差异达极显著水平。高原杂交粳稻滇杂35制种父母本最佳栽插行比为2∶14，产量达4618.42kg/hm²。

Study on the Yield Components of Dianza 35 Hybrid Seeds Production in CMS-D1 Type on the Plateau

The relationship between yield components and different row ratios of the female parents He Xi42A and male parents Nan34 of DianZa35 in japonica was studied.The results showed that the effective panicles，filled grains per panicle，seed sets and pollen grains density decreased as row ratio increased，based on prerequisite of the same transplanted density and excellent synchronization of flowering between parents.Among different row ratios，effective panicles were significantly different，filled grains per panicle，outcrossing rate，and yields per quarter were extremely significantly different.The best row ratio between male parent and female parent in hybrid seed production of DianZa35 was 2∶〖KG-*3/5〗14，the yields was 461842 kg/hm2.