论文部分内容阅读
对陕西关中小麦品种同化物积累分配特性及源库构成的遗传改良进行了分析.结果表明,在关中小麦品种更换中生物学产量的提高主要是开花前生物学产量的显著提高,品种演变中开花前积累的干物质在开花后的输出率显著增加,这对籽粒产量的提高有十分重要的作用.源库构成的分析表明,关中小麦品种在源库性状上存在着较大的遗传差异,且主要表现为源性状上的差异,在品种更换中品种逐渐由库限制向源限制转化,该地区目前育成的大穗品种花前源小是其在物质积累特性上的主要不足之处.
The assimilation and accumulation of assimilates in Guanzhong, Shaanxi Province, and the genetic improvement of source and sink composition were analyzed.The results showed that the increase of biological yield in Guanzhong wheat variety was mainly due to the significant increase of biological yield before flowering and the flowering of species The dry matter accumulation before flowering increased significantly after flowering, which played an important role in the increase of grain yield. Analysis of source pool composition showed that there was a large genetic difference in the characters of source sinks among Guanzhong wheat cultivars Mainly for the differences in the source traits, varieties in the variety of change gradually from the library to the source limit conversion, the region is currently bred varieties of large ears before flowering is its main characteristics of the material deficiencies.