摘要
本试验探讨了华南双季稻区利用亚种同杂种优势的特点和问题,结果表明:当前,两系亚种问杂种一代主要存在的问题是结实率低和谷草比低;籼粳交杂种易受环境条件的影响;每穗实粒数和单株有效穗数是决定单株产量的重要因子;每穗实粒数增加的关键在于结实率的提高,本文还就提高结实率和谷草比等问题提出了意见。
In the experiment,several photoperiod-temperature sensitive genie male sterile lines and some indica,japonica or javanica varieties (including wide compatibility varieties) were crossed to obtain 25 intersubspecificF1 hybrids(17 indica-japonica and 8 indica-javanica hybrids),15 intervarietal F1 hybrids.The feature andproblem in use of intersubspecies heterosis in south China region of two season rice were pointed out.The results indicated,Principal problem of intersubspecif ic F1 hybrid of two lines was lower setting percentage and grain-straw ratio.Indica-japonica hybrid was susceptible to environment condition.Filled graings per panicle and panicles per plant were the important factors determining grain yield per plant.Setting percentage was the key character affecting filled grains per panicle.The suggestions for increasing setting percentage and grain-straw ratio had been proposed.
出处
《华南农业大学学报》
CAS
CSCD
1992年第3期1-8,共8页
Journal of South China Agricultural University
基金
国家"863"计划资助
关键词
水妥
亚种间杂种
杂种优势
Rice
Intersubspecies hybrid
Heterosis
Setting percentage
Grain-straw ratio
