水、旱条件下小麦苗期部分农艺性状的遗传分析  

Genetic Analysis of Agronomic Characters of Wheat at Seedling Stage Under Drought Condition

作　　者：闫艳[1] 王春华[1] 穆平[1] 

机构地区：[1]青岛农业大学农学与植保学院,山东青岛266109

出　　处：《中国农学通报》2017年第3期8-14,共7页Chinese Agricultural Science Bulletin

基　　金：山东省现代农业产业体系小麦创新团队"遗传育种岗位"(SDAIT-01-05);山东省农业良种工程项目"耐盐碱小麦种质资源创新与利用"(2014-96)

摘　　要：为研究水分胁迫对小麦幼苗部分农艺性状的影响,分析这些性状与干旱胁迫的关系。以‘青麦6号’和‘烟农24’杂交形成的F2:3群体为材料,采用主基因+多基因混合遗传模型对其进行遗传分析。水、旱2种条件下,根长和根鲜重均为1对加性-显性效应主基因模型;茎鲜重、茎干重、根干重、根茎鲜重比和根茎干重比的最适遗传模型不同。干旱胁迫条件下,茎鲜重主基因遗传率为37%,茎干重、根长、根鲜重、根干重、根茎鲜重比及根茎干重比主基因遗传率分别是51%、81%、74%、56%、50%、68%。茎鲜重、茎干重、根干重等性状,尽管检测到主基因,但在水旱条件下遗传模型不同,可进一步研究其遗传规律。The paper aims to study the effect of water stress on some agronomic characters of wheat seedlings, and analyze the relationship between those characters and drought stress. The authors took hybrid F2：3 population as the material, which was formed by the hybridization of ＇Qingmai 6＇ and ＇Yannong 24＇, the mixed major gene plus polygene inheritance model was used to investigate the inheritance of these agronomic characters. Under water stress and drought stress, root length and root fresh weight fitted the inheritance model of one additive-dominant major gene, and the optimal genetic models of stem fresh weight, stem dry weight, root dry weight, ratio of root fresh weight to stem fresh weight and ratio of root dry weight to stem dry weight were different . Under drought stress, the major gene heritability of stem fresh weight was 37%, stem dry weight, root length, root fresh weight, root dry weight, ratio of root fresh weight to stem fresh weight and ratio of root dry weight to stem dry weight were controlled by the major gene, the major gene heritability of these characters was 51%, 81%, 74%, 56%, 50% and 68%, respectively. Although main genes were detected for stem fresh weight, stem dry weight and root dry weight, the genetic models were greatly influenced by environment and the genetic law of these characters should be further studied.

关 键 词：小麦 抗旱相关性状 遗传分析 F2:3家系 苗期 

分 类 号：S512.11[农业科学—作物学]