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本文估算了我区粳稻早、中、晚熟组的25个品种10个主要数量性状广义遗传力、相关系数,遗传进度及选择指数等遗传参数。结果表明:抽穗期、袜高、分蘖穗总粒数的遗传力较高。延长生育期、提高分蘖穗、总粒数、主穗着粒密度、主穗总粒、实粒数、结实率,同时降低株高、千总粒重可提高单株产量。株高、抽穗期、分蘖穗总粒数、主穗着粒密度、主穗总粒、实粒数的遗传进度很高,早期世代田间选择可获一定效果。选择指数表明:在选择单株产量的基础上选择与产量相关性较高的性状,效果会更好。
In this paper, genetic parameters such as general heritability, correlation coefficient, genetic progress and selection index of 10 major quantitative traits of 25 varieties of early, middle and late japonica rice in our district were estimated. The results showed that the heritability of heading date, sock height and total grain number of tillering spike were higher. Prolong the growth period, and increase tiller spike, total grain number, grain density of main ear, total grain of main spike, number of real grain, seed setting rate, and plant height at the same time. Plant height, heading date, the total number of tillers panicle, grain density of the main spike, main spike total grains, grain number of genetic progress is high, the early generations of field selection can be a certain effect. The selection index shows that selecting the traits related to the yield based on the yield per plant will be better.