小麦多小穗品系10-A单株籽粒产量染色体效应的研究

本文以不分枝普通多小穗品系10-A为被测材料，中国春和阿勃两套单体系列为测验系，对单株籽粒产量进行了单体分析。结果表明，被测系10-A单株籽粒产量受5A、7A、1B、2B、6B、2D和7D等染色体上的基因所控制。其中，5A、7A、2D和7D染色体上的基因表现为增效，1B、2B和6B染色体上的基因表现为减效。就作用强度而言，7A、1B、2D染色体上的基因表现为强效，5A、2B、6B和7D染色体上的基因表现为弱效。Abstract:Monosomic analysis of grain yield per plant was carried out in the common wheat (Triticum aestivam L.) multispikelet line 10-A, by using the monosomic series of the two regular lines, “Chinese Spring ” and “Abbondanza”. The grain yield per plant of the tested line 10-A was found to be controlled by seven pairs of genes, located on the chromosomes 5A、7A、2D、 7D (with increase effect) and 1B、2B、6B (with decrease effect). Of these, the chromosomes 7A、1B and 2D might carry major effect genes, and the chromosomes 5A、2B、6B and 7D might carry minor effect genes.According to analysis of the results in the past studies and the present, I was speculated that the new gene governing grain yield per plant was probably carried on the chromosome 1B of the tested line 10-A.

Effect of Chromosomes on Grain Yield Per Plant in the Common Wheat Multispikelet line 10-A