Prediction of the potential geographic distribution of Leymus chinensis based on MaxEnt and collection and protection of germplasm

doi:10.11686/cyxb2018052

Abstract

Abstract: There is an abundance of germplasm resources of Leymus chinensis in China; basic research on the collection and protection of this germplasm is significant for grassland ecological construction and animal husbandry development. The potential geographic distribution of L. chinensis globally was predicted using the ecological niche model (MaxEnt). Germplasm was collected using a grid sampling method and held in germplasm nursery. Potential geographic distribution was predicted by combining the known distribution and field investigation. The results showed that the potential suitable distribution of L. chinensis is constricted within Eastern Eurasia, the main suitable areas are concentrated in Northeast China, North China, Mongolia to southern Russia, USA, Canada, Pakistan, India, Nepal, Bhutan, Kyrgyzstan and Kazakhstan also have scattered low suitability distribution potential, accounting for 8.75% of the total global land area. In China, the potential suitable distribution area is mainly found in Inner Mongolia, Northern Xinjiang, Heilongjiang, Qinghai, Gansu, Xizang, Jilin, Hebei, Shanxi, Shanxi, Liaoning, Shandong, Northern Henan, Northwestern Sichuan, Ningxia, Beijing, Tianjin, scattered in Northern Jiangsu, Hubei, Northern Yunnan and Northern Anhui, accounting for 38.3% of the total global distribution area and 54.7% of the total China land area. A total of 483 wild L. chinense germplasm accessions were collected from 361 sample points and established in a germplasm nursery. The results will provide important resources for the study of the origin, formation, genetic structure, breeding, cultivation division and ecological restoration of L. chinensis.

Key words: Leymus chinensis, MaxEnt, potential geographic distribution, germplasm nursery, collection and protection

WU Zi-nian, HOU Xiang-yang, REN Wei-bo, WANG Zhao-lan, CHANG Chun, YANG Yu-ping, YANG Yan-ting. Prediction of the potential geographic distribution of Leymus chinensis based on MaxEnt and collection and protection of germplasm[J]. Acta Prataculturae Sinica, 2018, 27(10): 125-135.

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