摘要
冬季冻害是当前小麦生产面临的主要自然灾害之一。以我国黄淮海地区近年主栽的71个小麦品种为材料,通过对其抗寒性调查和VRN-A1、VRN-B1、VRN-D1位点基因型的分子标记鉴定,研究小麦抗寒性的生物学基础,探讨VRN1基因在小麦抗寒性中的作用。结果表明,小麦的抗寒性与其他抗逆性状相关联,生产和国家区域试验证实具有较好抗旱节水、耐盐碱等抗逆特性的品种多具有较强抗寒性。VRN1是小麦抗寒性的关键性遗传调控位点之一,显性基因VRN1的存在会显著降低品种的抗寒性,具有2个或3个VRN1基因的品种一般抗寒性都很弱,而3个位点均为隐性基因是品种具有强抗寒性的必备条件。因此,建议我国黄淮海北部地区应加强选育、推广基因型为vrn-A1vrnB1vrn-D1的品种,以保证小麦安全生产。
Winter freezing injury is one of the major natural disasters in wheat production. The effect of VRN1 genes on cold hardness was analyzed with phenotypic data and the allelic variations of VRN-A1, VRN-B1, VRN-D1 in 71 wheat varieties grown in Yellow-Huai-Hai River Valley region. The results indicated that the cold hardiness of wheat was correlated with other stress toler- ances, and strong cold hardiness was found in most varieties showing good salinity tolerance, drought tolerance or water-saving fea- ture in production and the National Variety Regional Trial. VRN1 is a critical locus in the genetic network of wheat cold hardiness. The presence of the dominant gene VRN1 was often accompanied with a significant decrease in cold hardiness, and weak cold hardi- ness was usually detected in the varieties with two or three VRN1 genes. Coexistence of recessive genes vrn-A1, vrn-B1, and vrn-D1 was found to be an indispensable prerequisite for strong cold hardiness. Therefore, the vrn-Alvrn-Blvrn-D1 genotype is suggested in wheat production and variety improvement in the northern part of Yellow-Huai-Hai River Valley region of China.
出处
《作物学报》
CAS
CSCD
北大核心
2015年第4期557-564,共8页
Acta Agronomica Sinica
基金
国家现代农业产业技术体系建设专项(CARS-03)
"十二五"农村领域国家科技计划课题(2012AA101105
2011BAD35B03-1)
国家公益性行业(农业)科研专项(201203033)资助
关键词
小麦品种
抗寒性
抗逆性
VRN1基因
Wheat varieties
Cold hardiness
Stress resistance
VRN1 genes
