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- Title
Genetic Diversity and Primary Core Collection Construction of Turnip (Brassica rapa L. ssp. rapifera Matzg) Landraces in Tibet Revealed via Morphological and SSR Markers.
- Authors
Li, Rongrong; Zhou, Fangyuan; Gao, Yingying; Liu, Chenlu; Yu, Shubo; Zhao, Kun; Gong, Wenfeng; Lang, Jie; Zhang, Haijuan; Yu, Xiaolin
- Abstract
Turnip, one of the oldest groups of cultivated Brassica rapa species, is a traditional crop as well as a form of animal fodder, a vegetable, and a herbal medicine that is widely cultivated in farming and farming-pastoral regions in Tibet. Different regions of the Qinghai–Tibet Plateau (QTP) are home to a rich diversity of turnip owing to their high altitudes and variable climate types. However, information on the morphology and genetic diversity of Tibetan turnip remains limited. Therefore, the genetic diversity of 171 turnip varieties from China and elsewhere (Japan, Korea, and Europe) was analyzed using 58 morphological characteristics and 31 simple sequence repeat (SSR) markers in this study. The varieties showed that the genetic distance ranged from 0.12 to 1.00, and the genetic similarity coefficient ranged between 0.73 and 0.95. Cluster tree showed two distinct clusters. Both morphotype and geography contributed to the group classification. A combination of morphological traits and molecular markers could refine the precision of accurate identification compared to the separate morphological and molecular data analyses. The sampling ratio of 15% to utmost precisely represent the initial population was compared to ratios of 10% and 20%, and the sampling ratio of 15% is recommended for future works when a primary core collection of turnip resources is constructed. These results could furnish a foundation for germplasm conservation and effective turnip breeding in future studies.
- Subjects
TIBET (China); CHINESE cabbage; GENETIC variation; TURNIPS; MICROSATELLITE repeats; BRASSICA; GERMPLASM
- Publication
Agronomy, 2021, Vol 11, Issue 10, p1901
- ISSN
2073-4395
- Publication type
Article
- DOI
10.3390/agronomy11101901