Genetic diversity and genetic structure of natural populations in an extremely narrowly distributed perennial species Glycine tabacina (Labill.) Benth. on the southeast islands in China
| Autor: | Zheng-Wei Zhang, Ke-Jing Wang, Xiang-Hua Li, Xu-Dong Wang |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine education.field_of_study Genetic diversity Population Zoology Outcrossing Plant Science Biology biology.organism_classification 01 natural sciences Gene flow 03 medical and health sciences 030104 developmental biology Genetic variation Genetic structure Genetics Biological dispersal education Agronomy and Crop Science Ecology Evolution Behavior and Systematics Glycine tabacina 010606 plant biology & botany |
| Zdroj: | Genetic Resources and Crop Evolution. 66:989-1008 |
| ISSN: | 1573-5109 0925-9864 |
| DOI: | 10.1007/s10722-019-00764-y |
| Popis: | In China, Glycine tabacina (Labill.) Benth. is only distributed in the southeast coast and islands. In this study, 28 natural populations of G. tabacina species were sampled from 13 islands using 22 SSR markers. The Chinese G. tabacina was characterized by higher outcrossing rate and within-population genetic variation, extensive migration, greater population genetic differences and geographically weak-associated genetic differentiation, with higher level of heterogeneity within the natural populations along the southeast islands of China even though this species is a self-pollinating plant. The number of alleles per locus averaged 5.77 and ranged from 2 to 16. The expected heterozygosity (He) per locus averaged a value of 0.51, varying from 0.08 to 0.80. As an autogamous species, the Chinese G. tabacina unexpectedly showed a relatively high mean outcrossing rate in single locus (ts = 6.52%) and multilocus (tm = 6.75%), higher mean gene flow (Nm = 0.315), lower mean gene differentiation index (Gst = 0.436), and particularly, relatively lower among-population genetic variation (43.55%) and higher within-population genetic variation (49.66%) revealed by analysis of molecular variance. Spatial autocorrelation analysis revealed that populations within a radius of approximately 14.7 km would have a positive and significant genetic relationship to one another. However, the event of long-distance genetic background dispersal was revealed by individual assignment test and haplotype analysis (> 200 km dispersal was inferred, but > 56 km dispersal was observed). The north and middle-north islands of Fujian Province seemed to be the center of genetic diversity. |
| Databáze: | OpenAIRE |
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