| 甘蓝型油菜抗裂角品种(系)的筛选与分析 |
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| 引用本文： | 文雁成,傅廷栋,涂金星,马朝芝,沈竞雄,张书芬.甘蓝型油菜抗裂角品种(系)的筛选与分析[J].作物学报,2008,34(1):163-166. |
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| 作者姓名： | 文雁成 傅廷栋 涂金星 马朝芝 沈竞雄 张书芬 |
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| 作者单位： | 1华中农业大学作物遗传改良国家重点实验室, 湖北武汉430070; 2河南省农业科学院经济作物研究所, 河南郑州450002 |
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| 摘 要： | 利用随机碰撞测试方法, 对229份自交纯合的甘蓝型油菜品种(系)进行了抗裂角指数测定, 以期筛选出抗裂角种质。结果表明, 抗裂角性状在现有品种(系)中存在广泛变异, 变异系数达114.4%。发现了2份抗裂角的品种(系), 占0.9%; 较抗的资源占3.93%; 处于中间状态的品种(系)占8.73%; 易裂角资源占27.07%, 极易裂角的品种(系)占59.39%。选择6个品种(系)进行了连续3年的测试, 表明抗裂角性状由品种(系)的遗传特性决定, 但受环境条件影响; 随机碰撞法具有较好的重现性。简单相关分析显示, 抗裂角指数与角果密度呈显著负相关, 与角皮厚度、角果长度、角果宽度、角喙长度、角粒数呈显著正相关, 但相关系数都很小。
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| 关 键 词： | 甘蓝型油菜 抗裂角 品种筛选 |
| 收稿时间： | 2007-01-29 |
| 修稿时间： | 1900-01-01 |
Screening and Analysis of Resistance to Silique Shattering in Rape (Brassica napus L.) |
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| Institution: | 1 National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, Hubei; 2 Institute of Industrial Crops, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan, China |
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| Abstract: | The silique shattering resistance index (SSRI) of 229 accessions (Brassica napus L.) was investigated through random impact test (RIT) for screening silique shattering (SS) resistance. The accessions displayed wide variation in SSRI, which ranged from 0.000 to 0.7675 with the variance coefficient (CV) of 114.4%. Only two varieties (accounting for 0.9%) showed SS resistance; about 3.93% of the varieties (lines) showed relative resistance to SS; and about 8.73% were identified as the medium. Most (59.38%) of the varieties (lines) were identified as very susceptible germplasm to SS, and 27.07% as the susceptible germplasm. According to independent experiments in three years with 6 representative varieties (lines), the SSRI was dominated by genetic factor with obvious interactions with environment, and the RIT showed stable results within years. The simple correlation analysis showed that the SSRI had significant (P<0.01) negative correlation with silique number per centimeter, and significant (P<0.01) positive correlations with silique wall thickness, silique length, silique width, beak length, and seed number per silique. However, the correlation coefficients (CV) were rather small indicating the selection potential of varieties with high SSRI and fine silique traits via recombination in B. napus breeding programs. |
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| Keywords: | Brassica napus L Silique shattering resistance Variety screening |
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