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Wheat germplasms are the important foundation for wheat breeding. In this study, the genetic diversity was analyzed for 40 wheat germplasms from Pingdingshan region using SSR molecular markers. Results showed that the percentage of polymorphic bands for SSR primers ranges from 35% to 100%, with an average of 74.5%. A total of 164 polymorphic bands were obtained by 29 pairs of SSR primers, with an average of 5.60 bands for a single pair of SSR primers. The effective number of alleles, Nei's gene diversity index, and Shannon's information index of SSR primers ranged from 1.17 to 1.66, from 0.11 to 0.38, and from 0.17 to 0.55, respectively, with the average values of 1.43, 0.26, and 0.39, respectively. The genetic similarity coefficient between different wheat germplasms is distributed between 0.55 and 0.98, with an average of 0.77. Based on the genetic similarity coefficient, the 40 wheat germplasms can be divided into five groups. Of them, group I contained three wheat germplasms; group Ⅱ contained eleven wheat germplasms; group Ⅲ contained five wheat germplasms; and group IV contained three wheat germplasms. Group Ⅴ contained the largest number (eighteen) of wheat germplasms, accounting for 45.0% of the total wheat germplasms. The result of principal component analysis was basically consistent with the results of cluster analysis. In addition, DNA fingerprints of the 40 wheat germplasms were constructed with SSR primers.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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