中国油料作物学报2018，Vol.40Issue(2)：209-217,9.DOI:10.7505/j.issn.1007-9084.2018.02.006
甘蓝型油菜微核心种质耐旱鉴定与评价指标筛选
Identification of a mini-core collection of Brassica napus accessions for drought tolerance and selection of evaluation indices
摘要
Abstract
Drought poses great threat to rapeseed (Brassica napus L.) production.It is important to establish a reliable evaluation method for drought tolerance.To select resistant germplasm,mini-core collection including seedlings of 107 rapeseed accessions was employed to establish a reliable method.Drought tolerance was evaluated after the procedure of'dehydration-rehydration-dehydration-rehydration'.The variations of drought tolerance were evaluated and ideal indicators of drought tolerance were selected.The evaluation included measuring several drought-tolerance-related indicators.Results showed that drought severely inhibited plant growth.Eight indicators were all significantly different.The distribution frequency of 107 accessions was normal.It indicated that shoot fresh weight stress index,plant fresh weight stress index,and drought resistant index were remarkably correlated with each other,thus the indicators could be used as major evaluation indicators for drought tolerance of B.napus seedlings.Among these indicators,shoot fresh weight stress index was the simplest,most accurate and effective one.By integrating the 3 indices,drought tolerance of 107 accessions were verified,and highly-tolerant accessions were selected among the mini-core collection.关键词
甘蓝型油菜/微核心种质/耐旱性/耐旱指标Key words
Brassica napus L./mini-core collection/drought tolerance/drought tolerance indices分类
农业科技引用本文复制引用
洪双,李浩,许鲲,程希,李洪戈,张付贵,曾长立,伍晓明..甘蓝型油菜微核心种质耐旱鉴定与评价指标筛选[J].中国油料作物学报,2018,40(2):209-217,9.基金项目
国家重点研发项目(2016YFD01100202) （2016YFD01100202）
农业部物种保护项目(2018NWB033) （2018NWB033）
中国农业科学院科技创新工程协同创新任务(CAAS-XTCX2016016-4) （CAAS-XTCX2016016-4）
