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本文估算了36个贵州高原粳稻地方品种8个主要经济性状的遗传力和遗传进度,结果表明,性状遗传力的大小顺序为:全生育期→株高→穗长→结实率→千粒重→每穗粒数→单株谷重→单株有效穗数。在5％的选择强度下,单株谷重、每穗粒数、结实率等性状可获得较大的遗传进展。研究结果认为:在贵州高原粳稻杂交育种中,全生育期、株高、穗长宜在早代进行选择,结实率、千粒重、每穗粒数亦可在早代加强选择,单株谷重和单株有效穗数则应着重根据株高、穗长、穗粒数、结实率、千粒重等与产量有关的性状进行间接选择。
This paper estimated the heritability and genetic progress of 8 major economic traits of 36 japonica rice landraces in Guizhou Plateau. The results showed that the order of heritability of heritability was: whole growth period → plant height → spike length → seed setting rate → 1000-grain weight → panicle weight per panicle Grain number → single grain weight per plant effective panicle number. Under the 5% selective intensity, larger genetic progress could be obtained for traits such as grain weight per plant, grain number per spike, seed setting rate and so on. The results showed that in the crossbreeding of Guizhou plateau japonica hybrid rice, the whole growth period, plant height and spike length should be selected in the early generation. Seed setting rate, 1000-grain weight, The effective panicles per plant should be based on plant height, spike length, grain number per spike, seed setting rate, 1000-grain weight and yield-related traits indirect selection.