模拟干旱胁迫下不同甘蓝型油菜品种发芽能力的配合力与遗传效应分析  

Combining Ability and Genetic Effects of Germination Ability in Different Brassica napus L. Cultivar under Simulated Drought Stress

作　　者：杨春杰[1] 程勇[1] 邹崇顺[1] 张学昆[1] 郑普英[1] 李桂英[1] 杨畅[1] 

机构地区：[1]中国农业科学院油料作物研究所,湖北武汉430062

出　　处：《作物学报》2008年第10期1744-1749,共6页Acta Agronomica Sinica

基　　金：国家高技术研究发展计划(863计划)项目(2006AA100106;2006AA10Z1C2);国家科技支撑计划项目(2006BAD07A04);中国农业科学院油料作物研究所所长基金项目

摘　　要：选择7个干旱胁迫下发芽能力不同的甘蓝型油菜品种进行完全双列杂交,将亲本及F1代种子在10%PEG模拟干旱胁迫条件下发芽,测定相对单株鲜重、相对茎长、相对成苗率、相对发芽率、相对发芽势和相对活力指数,用GriffingI方法对发芽性状进行一般配合力(GCA)和特殊配合力(SCA)遗传分析。结果表明,一般配合力方差在42个组合间各性状达到了极显著水平,特殊配合力方差在42个组合间除了相对活力指数外的各性状也达到了极显著水平。其中,中双9号上述6性状的一般配合力效应值最高分别为0.0656、0.0708、0.1185、0.1048、0.1096和0.0861;中双6号一般配合力效应虽然不高,但其组合中双6号×西农长角和中双6号×中双10号的特殊配合力效应较高,是耐旱性较强的组合。The rapeseed breeding for tolerance to drought is one of the most important ways to reduce yield loss from drought stress in autumn. Therefore, an experiment was conducted to estimate combining ability and heritability of drought tolerance during seed germination using complete diallel crossing design of seven cultivars. The germinating seeds of parents and Fl were treated with simulated drought stress in 10% PEG and grew for 7 d, then relative length of stem, relative fresh weight per plant, relative survival percentage, relative germination rate, relative germination energy, and relative vigor index were measured, gen- eral combining ability and special combining ability of germination traits were analyzed by Griffing I. The results showed that general combining ability was significantly different in six drought traits. And meanwhile special combining ability in five traits was significantly different except relative vigor index. Among 42 combinations, Zhongshuang 9 had the highest general combining ability effect values of six traits above which were 0.0708, 0.0656, 0.1185, 0.1048, 0.1096, and 0.0861, respectively. Although the general combining ability of Zhongshuang 6 was not very high, but the special combining ability of its combinations Zhongshuang 6 x Xinongchangjiao and Zhongshuang 6 x Zhongshuang 10 was higher. The combinations can be used in rapeseed breeding for drought tolerance.

关 键 词：甘蓝型油菜 种子 模拟干旱胁迫 耐旱性 配合力分析 双列杂交 发芽 

分 类 号：S565.4[农业科学—作物学]