1 材料与方法
1.1 材料
表1 不同芒果种质的来源Tab. 1 The basic characteristics of different varieties (or lines) |
| 编号Number | 种质资源Germplasm resource | 基本特征Basic characteristic |
|---|---|---|
| 1 | 串芒 | 象牙芒22号芽变单株,引种于广西,多胚,适应性强,中熟品种 |
| 2 | 桂热芒10号 | 中大型果,多胚,抗寒性强,后期果实易感炭疽病 |
| 3 | 红芒6号 | 皮薄果软,易感炭疽病,抗寒性强 |
| 4 | Mi-5 | 贵州野生种质资源,抗寒性强 |
| 5 | 台农1号 | 早熟品种,抗炭疽病强,耐贮运 |
| 6 | Mi-6 | 贵州野生种质资源,抗寒性强 |
| 7 | 红象牙芒 | 引种于广西,单胚 |
| 8 | 攀西红芒 | 引种于四川,多胚,中熟品种,适应性强 |
| 9 | 桂热芒82号 | 引种于广西,单胚,晚熟品种 |
| 10 | 凯特芒 | 原产于美国,单胚 |
| 11 | 金煌芒 | 台湾自育品种,多胚,中熟品种 |
| 12 | Mi-8 | 桂热芒82号实生单株,中大型果,抗寒性强,晚熟品种 |
| 13 | Mi-9 | 红象牙芒实生单株,中小型果,抗寒能力强,中晚熟品种 |
1.2 方法
表2 SRAP引物序列Tab. 2 Primers used in SRAP molecular markers |
| 正向引物 Forward primer (5′-3′) | 反向引物 Reverse primer (5′-3′) |
|---|---|
| ME1: TGAGTCCAAACCGGATA | EM1: GACTGCGTACGAATTAAT |
| ME2: TGAGTCCAAACCGGAGC | EM2: GACTGCGTACGAATTTGC |
| ME3: TGAGTCCAAACCGGAAT | EM3: GACTGCGTACGAATTGAC |
| ME4: TGAGTCCAAACCGGACC | EM4: GACTGCGTACGAATTTGA |
| ME5: TGAGTCCAAACCGGAAG | EM5: GACTGCGTACGAATTAAC |
| ME6: TGAGTCCAAACCGGTAG | EM6: GACTGCGTACGAATTGCA |
| ME7: TGAGTCCAAACCGGTAA | EM7: GACTGCGTACGAATTATG |
| ME8: TGAGTCCAAACCGGTGC | EM8: GACTGCGTACGAATTAGC |
| ME9: TGAGTCCAAACCGGTCC | EM9: GACTGCGTACGAATTACG |
| EM10: GACTGCGTACGAATTCAG | |
| EM11: GACTGCGTACGAATTCTG | |
| EM12: GACTGCGTACGAATTCCA |
1.3 数据处理
2 结果与分析
2.1 遗传多样性分析
表3 17对SRAP引物在芒果品种中的多态性分析Tab. 3 Polymorphism for the amplification patterns of mango varieties using 17 SRAP primer pairs |
| 引物组合 Primer pair | 扩增总条带数 Total number of bands | 多态性带数 Number of polymorphic bands | 多态性比率 Rate of polymorphic bands/% |
|---|---|---|---|
| ME1-EM6 | 12 | 11 | 91.67 |
| ME1-EM11 | 8 | 8 | 100.00 |
| ME2-EM1 | 6 | 5 | 83.33 |
| ME2-EM10 | 7 | 4 | 57.14 |
| ME3-EM3 | 5 | 3 | 60.00 |
| ME3-EM10 | 10 | 8 | 80.00 |
| ME4-EM2 | 8 | 8 | 100.00 |
| ME4-EM3 | 9 | 9 | 100.00 |
| ME4-EM4 | 13 | 11 | 84.62 |
| ME4-EM5 | 18 | 18 | 100.00 |
| ME5-EM3 | 10 | 6 | 60.00 |
| ME5-EM6 | 7 | 6 | 85.71 |
| ME5-EM7 | 9 | 7 | 77.78 |
| ME5-EM9 | 11 | 8 | 72.73 |
| ME6-EM3 | 8 | 5 | 62.50 |
| ME7-EM6 | 12 | 10 | 83.33 |
| ME7-EM8 | 8 | 6 | 75.00 |
2.2 聚类分析
表4 13个芒果品种间遗传相似系数Tab. 4 The variance range of genetic similarity coefficients of 13 mango varieties |
| 样品Sample | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.000 | ||||||||||||
| 2 | 0.795 | 1.000 | |||||||||||
| 3 | 0.708 | 0.714 | 1.000 | ||||||||||
| 4 | 0.752 | 0.783 | 0.720 | 1.000 | |||||||||
| 5 | 0.677 | 0.658 | 0.646 | 0.652 | 1.000 | ||||||||
| 6 | 0.752 | 0.708 | 0.658 | 0.739 | 0.665 | 1.000 | |||||||
| 7 | 0.764 | 0.696 | 0.696 | 0.652 | 0.689 | 0.702 | 1.000 | ||||||
| 8 | 0.752 | 0.820 | 0.683 | 0.714 | 0.727 | 0.714 | 0.689 | 1.000 | |||||
| 9 | 0.714 | 0.720 | 0.621 | 0.739 | 0.615 | 0.714 | 0.602 | 0.764 | 1.000 | ||||
| 10 | 0.665 | 0.720 | 0.696 | 0.702 | 0.652 | 0.727 | 0.665 | 0.702 | 0.689 | 1.000 | |||
| 11 | 0.745 | 0.764 | 0.702 | 0.671 | 0.658 | 0.733 | 0.708 | 0.720 | 0.696 | 0.783 | 1.000 | ||
| 12 | 0.665 | 0.696 | 0.634 | 0.702 | 0.640 | 0.739 | 0.652 | 0.702 | 0.776 | 0.652 | 0.696 | 1.000 | |
| 13 | 0.658 | 0.702 | 0.752 | 0.658 | 0.646 | 0.621 | 0.708 | 0.708 | 0.621 | 0.758 | 0.739 | 0.658 | 1.000 |
