不同密度与行比对杂交粳稻制种产量的影响

根据杂交水稻特点不同选用生产上推广应用的两个杂交水稻水稻组合,通过调节不育系栽培密度与行比,构建高产优质制种群体。试验设计5个密度处理和5个行比处理,对制种组合进行行比试验,研究结果表明,就杂交粳稻制种产量而言,在母本苗数、父母本行比一定的情况下,通过调节栽培密度,或者在栽培密度、基本苗数不变的情况下,调节行比,均能取得较高的制种产量,而且两者达到最高产量的母本有效穗数均在300万~330万穗/hm2,越接近这个区间的群体,产量越高,这样的群体结构与生产实践相吻合。各因子与制种产量之间的相关性依次为有效穗数异交结实率每穗粒数。

Effects of Different Densitv and Ratio of Japonica Hybrid Rice Seed Production

According to the application characteristics of different selection of hybrid rice production on the two hybrid rice com- binations, By adjusting the sterile planting density and row ratio, Construction of high yield and high quality seed production group. Through the experiment of 5 density and 5 rows than processing, On seed portfolio than test,Research results show that, on the seed yield of Japonica Hybrid Rice, In the female parent seedling number,ratio between parental lines in certain circum- stances, By adjusting the planting density, or planting density, the number of seedling under the condition of constant, Adjust row ratio, can obtain higher seed yield, And both of them reached the highest yield of effective panicle number are maternal 330 mil- lion in the 3 000 000 spike/hm^2 ,The closer the interval of the population, the higher the yield, Population structure and produc- tion practice of this match. Correlation between each factor and seed yield were effective panicle number 〉 outcrossing rate,grain number per panicle .