首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Evidence for a triplicate set of glucosephosphate isomerase structural genes in hexaploid wheat
Authors:Gary E Hart
Institution:(1) Genetics Section, Department of Plant Sciences, Texas A & M University, 77843 College Station, Texas
Abstract:The glucosephosphate isomerase (GPI) zymogram phenotypes of 46 aneuploid derivatives of the cultivar Chinese Spring of hexaploid wheat were determined. Variation was observed among the strains in the relative level of expression of three GPI isozymes. The relationships observed between chromosomal constitution and zymogram phenotype support the hypothesis that the three GPI isozymes are dimers composed of protomers encoded by a minimum of three homoeologous structural genes located one each in the short arms of chromosomes 1A, 1B, and 1D. The relative levels of expression per dose of chromosome arm of the products of the three arms differ in a manner consistent with the presence of a two-fold greater quantity of the product of 1BS than of the product of 1AS and of 1DS, indicating that 1BS may contain duplicate GPI structural genes.
Keywords:glucosephosphate isomerase  gene duplication  hexaploid wheat  polyploid evolution  zymogram technique
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号