抗矮缩病小麦产量及其关键性状遗传模型分析  

Genetic Model Analysis on Yield and Key Characters of Wheat Resistant Wheat Dwarf Virus

作　　者：范绍强[1] 武银玉[1] 王全亮 王红梅 曹亚萍[1] 

机构地区：[1]山西省农业科学院小麦研究所,山西临汾041000 [2]襄汾县农业委员会,山西襄汾041500 [3]洪洞县农村经营管理中心,山西洪洞041600

出　　处：《山西农业科学》2018年第1期14-17,24,共5页Journal of Shanxi Agricultural Sciences

基　　金：公益性行业(农业)科研专项(201303021);"948"引进项目(2015-Z5)

摘　　要：为探讨抗矮缩病材料产量性状遗传机制,以2个抗矮缩病小麦材料为母本、3个高产品种为父本配制6个杂交组合,并对F1进行回交和自交,选用6个组合6世代资料,采用联合尺度检验和Gamble模式分析方法,对产量及其关键性状进行遗传模型分析。结果表明,产量对加性-显性遗传模型的符合度在70%左右,回交亲本的基因导致上位性效应加强,且抗病亲本产生正效应,同时显性和显性×显性互作效应大于加性效应。3个产量关键性状中,只有公顷穗数符合加性-显性遗传模型,并且显性效应大于加性效应,应于早代进行选择;穗粒数遗传基础复杂,选择困难;千粒质量遗传相对简单,可在早期作为产量间接选择指标。Six combinations were crossed, two materials resistant wheat dwarf virus as female and three high yield varieties as male,following backcross and self-cross to F1 generation for research the genetic mechanism of yield traits. The genetic model of yield and its key traits were analyzed by joint scaling test and Gamble model methods in six generations of six combinations. The results showed that yield trait according with additive-dominance model was about 70% . The gene of backcross parent enhanced the epistatic effect, and the positive effect with the disease-resistant parent and the negative effects with high-yield parent. Dominant effect and dominant ×dominant interaction effect were greater than additive＇s. Among these three key characters of yield, spike number per hectare accorded with additive-dominant genetic model, and the dominant effect was greater than the additive effect. So, spike number per hectare could be selected in the early generation. Kernel number per spike was selected in difficulty for complication of its genetic, and 1 000-grain quality could be as indirect selection criterion for yield in the early generations for simple of its heredity.

关 键 词：小麦 矮缩病 产量 关键性状 遗传模型 

分 类 号：S512.1[农业科学—作物学]