生物技术通报 ›› 2021, Vol. 37 ›› Issue (8): 243-252.doi: 10.13560/j.cnki.biotech.bull.1985.2021-0057

• 综述与专论 • 上一篇    下一篇

苜蓿抗旱性分子研究进展

李倩1,2(), 江文波1, 王玉祥2, 张博2(), 庞永珍1()   

  1. 1.中国农业科学院北京畜牧兽医研究所,北京 100193
    2.新疆农业大学草业与环境科学学院,乌鲁木齐 833400
  • 收稿日期:2021-01-14 出版日期:2021-08-26 发布日期:2021-09-10
  • 作者简介:李倩,女,博士研究生,研究方向:牧草遗传育种;E-mail: 540794898@qq.com
  • 基金资助:
    国家自然科学基金项目(31860675);中央级公益性科研院所基本科研业务费(2020-YWF-ZX-07)

Research Progresses on the Drought Resistance of Medicago at Molecular Level

LI Qian1,2(), JIANG Wen-bo1, WANG Yu-xiang2, ZHANG Bo2(), PANG Yong-zhen1()   

  1. 1. Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing 100193
    2. Xinjiang Agricultural University,College of Grassland and Environmental Sciences, Urumqi 833400
  • Received:2021-01-14 Published:2021-08-26 Online:2021-09-10

摘要:

干旱胁迫是严重限制全球农业生产的环境因素,造成了牧草大量减产。综述了4种重要苜蓿在干旱胁迫下的相关基因以及抗旱育种方面的主要进展,并对苜蓿耐旱性研究的前景及存在问题进行了讨论。提出可充分利用生物技术,挖掘抗旱相关基因资源,在豆科模式植物蒺藜苜蓿中验证基因功能,阐明苜蓿抗旱应答网络机制,进而从黄花苜蓿中克隆抗旱相关基因,最终通过分子育种手段培养高抗旱性紫花苜蓿新品种。培育耐旱紫花苜蓿新品种是改善其在干旱胁迫下生长、提高其产量的有效途径,通过生物技术获得耐旱紫花苜蓿种质可用于遗传改良,为我国粮改饲政策的实施提供饲草新材料,促进草牧业健康可持续发展。

关键词: 苜蓿属, 抗旱, 分子机制, 分子育种

Abstract:

Drought stress is one of the most serious environmental constraints for global agricultural production,and it causes severe losses in pasture production. In this paper,drought induction related genes and the main progresses on the breeding of 4 important Medicago plants with drought resistance were reviewed,and the prospects and issues in this field were also discussed. It is suggested that biological technology can be utilized to explore drought-resistance related gene resources,then to preliminarily verify the function of target genes in the model legume plant Medicago truncatula. Further the mechanism of drought resistance response network in M. truncatula was clarified,and then the drought-resistance related genes from Medicago falcata was cloned. Finally,cultivating new alfalfa varieties with high drought-resistance was proposed by using molecular breeding approaches. Cultivating new alfalfa varieties with drought-tolerant is an effective way to improve Medicago growth and yield under drought stress. It is of great significance to obtain drought-tolerant alfalfa germplasm through biotechnology approaches for genetic improvement,and to provide new cultivars during the implementation of the Grain to Feed Policy of China,and ultimately to promote the healthy and sustainable development of grass and animal husbandry.

Key words: Medicago, drought resistance, molecular mechanism, molecular breeding