不同小麦品种源库状况的初步研究

从源库相互作用的原理出发,提出了一种判小麦品种源库状况的方法,并以此考察了20个不同来源和特性的小麦基因型的源库状况。描述小麦基因型源库状况的源库指数X的定义域为-1,+1]。黄淮麦区推广品种的X值一般在-0.3～+0.3之间,说阳其源库关系基本协调。X值与千粒重有较密切的直线关系,从品种的千粒重大小可大致了解其源库状况。黄淮麦区源库协调的小麦品种千粒重应为38～40g。

INVESTIGATIONS INTO THE SOURCE-SINK SITUATION OF DIFFERENT WHEAT GENOTYPES

A new method for evaluating source-sink situation of wheat genotypes was worked out on the basis of the principles of source-sink interactions. With this method, the source-sink situation of 20 different wheat genotypes were investigated.By defination, the source-sink index X, which describes the source-sink situation of a geneotype ,should be from -1 to 1. The calculated X values of the commercial cultivars in the Huang-huai wheat producing area were from -0.3 to 0.3, thus, indicating that their sources and sinks are generally in balance.The X value had a good linear correlation with 1000-grain weight, from which we can roughly know the source-sink situation of a given genotype simply by determing its 1000-grain weight. 1000-grain weight of cultivars adaptable to the Huang-huai wheat producing area should be in the range of 38 to 40 grams.