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以杂交水稻组合 80优 1 2 1 (中粳 )和协优 5 7(中籼 )为材料 ,进行栽插密度试验 ,以培育数量和质量不同的群体 ,研究群体数量与质量的关系。试验结果表明 ,基本苗数、最高茎蘖数等群体数量性状之间和分蘖穗率、茎蘖成穗率等群体质量性状之间都呈正相关。群体数量与质量性状之间呈负相关 ,其中基本苗数与分蘖穗率、最高茎蘖数与茎蘖成穗率、总颖花数与结实率、有效穗数与平均穗谷重 4对性状间相互关系最密切。在试验条件下 ,有效穗数、平均穗谷重、总颖花数和结实率对产量的直接作用较大 ,因此高产栽培需在适宜穗数和总颖花数的前提下提高结实率和平均穗谷重。
The hybrid rice density 80 you 121 (middle japonica) and Xieyou 5 7 (medium indica) were planted density experiment to cultivate different quantity and quality of groups to study the relationship between population quantity and quality. The results showed that there was a positive correlation between QTLs such as basic seedling number, maximum tiller number and other population traits. There was a negative correlation between population quantity and quality traits, among which, the number of basic seedling and tillering percentage, the highest number of tillering and tillering rate, total spikelet and seed setting rate, effective panicle number and average panicle weight and grain weight were 4 Most closely related to each other. Under the experimental conditions, the effective panicle number, the average panicle valley weight, the total spikelet number and the seed setting rate had a direct effect on the yield, so the high yielding cultivation needed to improve the seed setting rate and average Spike valley weight.