【摘要】 1988—1989年利用黄早4姊妹系进行了选育改良单交种和提高制种产量的研究。结果表明:黄早4姊妹种普遍存在着杂种优势,姊妹种与黄早4相比,植株变高,雄穗发达,抗病性增强,穗部性状有所改进,产量明显提高,增产幅度在45%～105%之间。配合力分析结果表明,不同姊妹种间的一般配合力和特殊配合力存在着明显差异,可以从中选出比黄早4配合力高的优良姊妹种,用其组配的改良单交种的产量与对应单交种产量持平或略有提高,并且若干性状有所改良。用姊妹种代替黄早4配制改良单交种,可以显著提高制种产量。更多还原

【Abstract】 The experiment carried out in 1988—1989 shows that there exi-sts heterosis in all sister single crosses—superiorities in plant height,diseaseresistance,male flower flourishing,ear-kernel characters,and there is aninerease in output by 45%—105% as compared with line Huangzao 4.Analy-sis indicates that differences in general and specific combining ability amongsister crosses are quite obvious.To produce the seed of modified single cro-sses by the substitution of sister single crosses for line Huangzao 4,an incr-ease of the autput of seed production and decrease of seed cost can be acqui-red.更多还原