摘要
以10%(w/v)PEG6000做渗透介质模拟干旱条件,对不同来源的甘蓝型油菜(Brassica napus L.)品种(系)进行干旱胁迫下种子发芽鉴定,分析油菜种子发芽耐旱性的遗传多样性。结果表明:干旱胁迫下,部分材料处理与对照的发芽性状有显著性差异,81个甘蓝型油菜材料的平均苗高处理比对照低36.5%,平均鲜重处理比对照低31%,成苗率降低11.1%。甘蓝型油菜品种(系)耐旱性有较大遗传差异,幼苗活力指数的变异幅度为19%-81%,平均活力指数为55%。相关分析表明,活力指数与胁迫下的发芽性状达极显著正相关,可以作为油菜种子发芽耐旱的综合指标。根据活力指数,将81个油菜资源划分为强,中,弱三个耐旱等级,并筛选到30295,30253,中双6号,30703,30296,30290,30704,中油杂9号,德油4号等一批耐旱遗传资源。
Drought tolerance of 81 varieties of rapeseeds （Brassica napus L. ） from different genetic resources was investigated during germination with simulate water stress by 10% （w/v） PEG6000. The results showed that the seedling traits of several treatments were significantly different from control after drought stress. The average seedling height of treatment deceased 36.5%, the average fresh weight decreased 31% and relative germination rate decrease 11.1%. There were significant difference of drought tolerance among different varieties or lines. The seedling vigor index ranges from 19% to 81% ,with an average of 55%. Correlation analyses indicated that the vigor index has significant positive correlation with the seedling traits under drought stress. Some varieties or lines, 30295,30253, Zhongshuang 6,30703,30296,30290,30704, Zhuongyouza 9 and Deyou 4, could be classified as high drought tolerant germplasm resources with higher vigor index.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2008年第4期438-442,共5页
Chinese Journal of Oil Crop Sciences
基金
863计划(2006AA100106)
国家科技支撑计划(2006BAD21B03)
