谷子产量性状影响因子的多元分析

MULTIPLE ANALYSIS ON INFLUENCING FACTORS OF GRAIN YIELD IN MILLET

摘要:

本文用相关(简单相关、偏相关)、逐步回归、通径分析等方法,研究了49个高产品种(系)的8个性状对产量的效应。尽管采用的方法不同,但所得结果完全一致。穗粒数对单株产量贡献最大,其次是穗重和千粒重,穗粒数与千粒重之间呈负相关,要协调和利用二因子使其并进。要使穗粒数增加,就要以壮杆为主;要是高千粒重,就要以增加穗长和穗粗为主;穗重的提高主要是穗粒数的效应,千粒重等性状对穗重的效应均为正值,切不可忽视它们的作用。株高对穗粒重的直接效应不明显。

Abstract:

Eight characters to effect of grain yield in millet were studied using simple correlation, partial correlation, stepwise regression and path-coefficient analysis. Fourty-nine high-yield varieties were used in this test. For all that different methods were used, the results tended to be in common. Kernel/spike provided the biggest contributions to yield of a plant, and followed spike weight and 1000-kernel weight. Kernel/spike had negtive correlation with 1000-kernel weight. Thus, it was necessary to increase both kernel/spike and 1000-kernel weight at sametime.In order to increase kernel/spike, it was important to make calm strong, and to enhance 1000-kernel weight, it was main way to increase length of earhead and thickness of earhead. Kernel/spike was mainly affected by spike weight. 1000-kernel weight and other characters involved the study were positve correlation with spike weight, and those were never ignored. Plant height had not significantly direct effect to kernel weight of spike.