玉米杂种一代农艺性状和杂种优势的相关分析

Correlation Analysis on Agronomic Characters and Heterosis of Maize F_1 Hybrids

通过对３２个不同胚乳类型玉米杂交组合，１１个农艺性状及其杂种优势的相关分析和通径分析表明，不同胚乳类型问杂交组合的性状优于相同胚乳类型间的性状。而性状杂种优势也是相同的．对单株产量起直接作用的是穗重、行粒数、千粒重。对单株产量优势起直接作用的是穗重、千粒重优势．

The thirty-two F_1 hybrids with different endosperm types and elevenagronomic charaters and heterosis were researched with correlation analysis and pathanalysis. The results showed the character values of F_1 hybrids with different endospemltypes is higher than those of F_1 hybrids with same endosperm types. That was similar inheterosis of characters. The order of the greatest direct action to yield per plant wasweight per ear, number of kernel per line, 1 000-kernel weight. The order of the great-est direct action to heterosis of yield per plant was the heterosis of weight per ear,1000- kernel weight.