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关于杂交水稻的遗传规律,近年来有关单位在籼稻方面做过不少研究,对粳稻的研究较少。现根据我们在吉林农科院1978～1980年试验结果,就杂交粳稻的生育期、株型、抗病性及产量构成因素等遗传规律初步总结如下,以供商讨。一、生育期:生育期长短通常以抽穗早晚作主要标志。抽穗期是数量性状,杂种 F_1表现为两亲中值,但杂交水稻一般来自熟期差异明显的两个远缘亲本,在远缘亲本的相互作用下,不同组合的抽穗期早晚往往出现多样性,除中间类型外,经常出现偏早、偏晚或超亲类型。据1978年测交试验调查,180个组合中,F_1抽穗期相当两亲中值的63个,占35%,偏
On the genetic law of hybrid rice, in recent years, the relevant units in indica rice done a lot of research, less research on japonica rice. Based on the results of our experiments conducted in Jilin Academy of Agricultural Sciences from 1978 to 1980, the genetic laws of growth, plant type, disease resistance and yield components of japonica hybrid rice are summarized as follows for discussion. First, the growth period: the length of growth usually heading sooner or later as the main symbol. The heading date is a quantitative trait, and the hybrid F_1 shows the median of the two parents. However, the hybrid rice generally comes from two distant parents with obvious differences in maturity. Under the interaction of distant parents, the early and late heading of different combinations tend to occur , In addition to the middle type, often appear early, late or super-pro type. According to the 1978 test of crossbreeding test, among 180 combinations, there were 63 medium progeny of F_1 heading date, accounting for 35%