1 材料与方法
1.1 材料
1.2 方法
2 结果与分析
2.1 抗蚜性遗传分析
表1 西瓜抗蚜性遗传分析Tab. 1 Genetic analysis of watermelon resistance to A. gossypii |
| 杂交组合 Hybridization combination | F1 | F2 | 分离比 Separation ratio | χ20.05 | ||||
|---|---|---|---|---|---|---|---|---|
| 植株总数 No. of plants | 平均单株蚜量比值 Average aphid ratio per plant | 表型 phenotype | 植株总数 No. of plants | 抗 Resistant | 感 Susceptible | |||
| ‘黑皮’ב花绿’ | 97 | 0.22 | HR | 625 | 468 | 157 | 2.98:1 | 0.0005 |
| ‘花绿’ב黑皮’ | 101 | 0.24 | HR | 598 | 456 | 142 | 3.21:1 | 0.437 |
2.2 抗蚜性遗传的RAPD标记验证
图1 RAPD引物在F2代抗、感混合DNA池的PCR扩增1~2:引物WO4;3~4:引物WO9;5~6:引物WO18;7~8:引物WO27;9~10:引物WO39;M:DNA marker。 Fig. 1 RAPD primers to amplify by PCR in mixed DNA of F2 resistant DNA and susceptible DNA 1-2: Primer WO4; 3-4: Primer WO9; 5-6: PrimerWO18; 7-8: Primer WO27; 9-10: Primer WO39; M: DNA marker. |
图2 引物WO4对抗和感亲本、F1、F2抗及感混合DNA池、F2抗及感单株的PCR扩增1:F2代感蚜混合DNA池;2:感蚜亲本‘花绿’;3:F2代感蚜单株;4:F2代抗蚜混合DNA池;5:抗蚜亲本‘黑皮’;6:F1代;7:F2代抗蚜单株;M:DNA marker。 Fig. 2 Primer WO4 to amplify by PCR in resistant parent DNA, susceptible parent DNA, F1 DNA, mixed DNA of F2 resistant DNA and susceptible DNA, F2 single resistant plant DNA, F2 single susceptible plant DNA 1: F2 susceptible DNA; 2: Susceptible parent ‘Hualv’; 3: F2 single susceptible plant; 4: F2 resistant DNA; 5: Resistant parent ‘Heipi’; 6: F1; 7: F2 single resistant plant; M: DNA marker. |
图3 引物WO4对F2代20个抗、感单株的PCR扩增1~10:F2代感蚜单株;11~20:F2代抗蚜单株;M:DNA marker。 Fig. 3 Primer WO4 to amplify by PCR in 20 DNA of F2 single resistant and susceptible plants 1-10: F2 aphid-susceptible plant; 11-20: F2 aphid-resistant plant; M: DNA marker. |
图4 引物WO4对8个供试抗、感品种的PCR扩增1~4分别为感蚜品种‘花绿’‘凤光’‘蕙宝’和‘甜美人’;5~8分别为抗蚜品种‘黑皮’‘绿美人’‘黑美人’和‘惠兰’;M:DNA marker。 Fig. 4 Primer WO4 to amplify by PCR in 8 DNA of resistant and susceptible cultivars 1-4: Susceptible cultivars ‘Hualv’, ‘Fengguang’, ‘Huibao’ and ‘Tianmeiren’; 5-8: Resistant cultivars ‘Heipi’, ‘Lvmeiren’, ‘Heimeiren’ and ‘Huilan’; M: DNA marker. |
2.3 抗蚜性遗传的SCAR标记验证
图5 引物WO4-S对8个供试抗、感品种的扩增结果1~4:感蚜品种;5~8:抗蚜品种;M:DNA marker。 Fig. 5 Primer WO4-S to amplify by PCR in 8 DNA of resistant and susceptible cultivars 1-4: Susceptible cultivars; 5-8: Resistant cultivars; M: DNA marker. |
