巨穗小麦种质小穗数的染色体定位研究  

Chromosomal location of genes for spikelet number of the giant spike wheat germplasm

作　　者：谢晓玲[1] 邓自发[1] 解俊峰[2] 

机构地区：[1]南通师范学院生命科学与技术系,江苏南通226007 [2]中国科学院西北高原生物研究所,青海西宁810001

出　　处：《湖北农业科学》2003年第5期19-22,共4页Hubei Agricultural Sciences

基　　金：国家自然科学基金资助项目(39470446)

摘　　要：巨穗小麦新种质材料是一具有茎秆粗壮、叶片短宽直立、穗大、粒大、结实率高等特点的种质资源。应用单体分析和双端体分析方法对"241"材料进行遗传学研究,结果表明,小麦新种质材料"241"的3A、1B、2B和6B染色体上具有控制小穗数的隐性基因,其中3A、1B和2B染色体上的基因表现为强效,6B染色体上的基因表现为弱效。通过双端体分析进一步将控制小穗数的基因定位到3AS、1BL和6BS上,其中3AS、6BS上可能具有控制"241"小穗数的新基因。控制"241"穗粒数和控制小穗数的基因可能存在一定的连锁关系。The genes which control the spikelet numbers of the giant spike wheat germplasm“241' were located on chromosome and chromosome arms with “Chinese spring” monosomic series and ditelosomic series as the testing lines The results showed that the spikelet numbers of “241” is controlled by genes on the chromosomes 3AS, 1BL,2B and 6BS respectively, three major genes on 3AS, 1BL and 2B,and one minor gene on 6BS The result of monosomic analysis indicated that the four genes are recessive According to the results in the previous studies and in the present experiment, it is speculated that chromosome 3A and 6B of “241” carried new genes controlling spikelet number There is linkage relationship between the genes controlling spikelet number and that of the kernal number

关 键 词：巨穗小麦 种质资源 小穗数 染色体定位 单体分析 双端体分析 基因定位 

分 类 号：S512.1[农业科学—作物学]