作物学报2017，Vol.43Issue(9)：1381-1394,14.DOI:10.3724/SP.J.1006.2017.01381
薏苡种质资源成株期抗旱性鉴定及抗旱指标筛选
Identification and Indices Screening of Drought Resistance at Adult Plant Stage in Job's Tears Germplasm Resources
摘要
Abstract
Drought is one of the major problems for Job's tears production. The plant height, culm diameter, branch number, culm node number, tiller number, grain number per plant, grain weight per plant, 1000-grain weight, and yield of 50 accessions of Job's tears germplasm were measured in normal irrigation and drought stress treatments. Drought resistance comprehensive evaluation value (D value), comprehensive drought resistance coefficient (CDC value), and weight drought resistance coefficient (WDC value) were used in correlation analysis, frequency analysis, principal component analysis, grey relational analysis, subordinate function analysis, clustering analysis, and stepwise regression analysis to identify and screen drought resistance indices at adult plant stage of tested Job's tears germplasm. There were differences in response to drought stress and correlations between all in-dices. Six common factors could represent 90.80% of the original information of Job's tears drought resistance data. The ranks of drought resistance of tested Job's tears germplasm based on D value, CDC value, and WDC value were similar. The yield drought resistance coefficient (Y value) of tested Job's tears germplasm had significant and positive correlation with D value, CDC value, and WDC value. Liangfengyi 14-2, yy03-8, and yy18-1 were identified as drought resistant Job's tears germplasm at adult plant stage. Tiller number, grain weight per plant, and 1000-grain weight could be used as the intuitive identification indices for drought resistance in Job's tears germplasm resources at adult plant stage.关键词
薏苡/成株期/抗旱性/抗旱指标/综合评价Key words
Job's tears/Adult plant stage/Drought resistance/Drought resistance indices/Comprehensive evaluation引用本文复制引用
汪灿,周棱波,张国兵,张立异,徐燕,高旭,姜讷,邵明波..薏苡种质资源成株期抗旱性鉴定及抗旱指标筛选[J].作物学报,2017,43(9):1381-1394,14.基金项目
本研究由贵州省农业攻关计划项目(黔科合机农字[2013]4025号)和贵州省农业动植物育种专项资金项目(黔农育专字[2012]023号)资助. This study was supported by the Guizhou Agricultural Research Plan Project (QKHJNZ[2013]4025) and the Special Funds for Guizhou Agricultural Animal and Plant Breeding (QNYZZ[2012]023). （黔科合机农字[2013]4025号）
