草业科学2017，Vol.34Issue(4)：706-713,8.DOI:10.11829/j.issn.1001-0629.2016-0601
8份柳枝稷种质资源苗期抗旱性综合评价
Evaluation of drought resistance in seedlings of eight switchgrass accessions
摘要
Abstract
Switchgrass (Panicum virgatum) is one of the important energy grasses,and the drought resistance of its seedling stage plays a key role in growth under arid and semi-arid conditions.Therefore,selecting switchgrass genotypes with good drought tolerance in the seedling stage is important.In greenhouse experiments,we tested eight physiological indicators related to drought resistance,including superoxide dismutase and peroxidase activity,free proline,soluble protein,soluble sugar and leaf water content,relative electrical conductivity,and malondialdehyde levels.In addition,we evaluated the drought resistance of eight switchgrass varieties chosen from American gene bank by subordinative function value analysis.The results showed that the eight accessions compared differed significantly in drought resistance at seeding stage.The drought resistance ranking was as follows:Shawnee＞Cave-in-Rock＞ Blackwell＞BN-309-69 ＞ Trailblazer＞ Carthage＞ TEM-SLC＞Grenville.The results provided a theoretical basis for developing switchgrass breeding programmes aiming to improve drought resistance,and valuable information for planting switchgrass varieties in marginal lands.关键词
柳枝稷/干旱胁迫/耐旱/生理指标/隶属函数法Key words
switchgrass/drought stress/drought tolerance/physiological index/subordinate function analysis分类
农业科技引用本文复制引用
张爱玲,缪致铭,解关琦,黄琳凯,付晨,陈志宏,杨晓鹏,邱盛洁,董青林,严海东,蒋洁,张新全..8份柳枝稷种质资源苗期抗旱性综合评价[J].草业科学,2017,34(4):706-713,8.基金项目
国家自然基金(312201845) （312201845）
科技部“十二五”863计划(2012AA101801-2) （2012AA101801-2）
四川省国际合作项目(2017HH0071) （2017HH0071）
四川农业大学大学生创新计划(201410626003) （201410626003）
