小麦品质与产量性状的相关和通径分析

CORRELATION AND PATH ANALYSIS OF YIELD AND OUALITY CHARACTERS IN WHEAT

以１６个不同类型的品种为材料研究了氮素及干物质积累、运转和分配对小麦品质和产量性状的影响。结果表明，籽粒产量主要受粒重所制约，其干物质积累主要来自开花后的光合产物。花前和花后积氮量对蛋白质含量均起重要作用，高蛋白基因型的氮运转分配效率并不一定高。蛋白质产量和成熟期总氮量可作为高产、优质的选育指标。

The effects of N and dry matter aceumulation , transportion and distribution on wheatyield and quality characters were studied with 16 various varieties of winter wheat. The re-sults indicated that the grain yield was controlled by grain weight , and the dry matter accu-mulation of grain yield mainly came from products of photosynthesis after anthesis。The totalN content before and after anthesis had a remarkable effect on protein content,but the highprotein genetype might not necessarily have a high nitrogen harvest index。The protein yieldand total Naccumulation might be a selection criterion of high yield and good quality。