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Journal of Arid Land  2015, Vol. 7 Issue (2): 264-271    DOI: 10.1007/s40333-014-0044-2     CSTR: 32276.14.s40333-014-0044-2
Brief Communication     
Genetic structure and historical demography of Malus sieversii in the Yili Valley and the western mountains of the Junggar Basin, Xinjiang, China
HongXiang ZHANG1, MingLi ZHANG1,2, LiNa WANG3
1 Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
3 Central China Normal University, Wuhan 430079, China
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Abstract  Malus sieversii, a wild progenitor of domesticated apple, is distributed in western Xinjiang of China, eastern part of Kazakhstan and Kyrgyzstan in Central Asia. To well understand the genetic structure and the historical demography of this important germplasm resource, we sampled 15 populations with 110 individuals of Malus sieversii from the Yili Valley and the western mountains of the Junggar Basin, Xinjiang, and sequenced two nrDNA fragments for these 110 individuals. Meanwhile, we modeled and compared species distributions under the current and the Last Glacial Maximum climatic conditions. The results showed that populations of M. sieversii from Xinjiang had low levels of genetic diversity and genetic differentiation. During the LGM period, populations of M. sieversii had lost their northern distributions in the western mountains of the Junggar Basin. M. sieversii has experienced a demographic expansion from the south of the Yili Valley to the north of the western mountains of the Junggar Basin during the warm interglacial epochs. Due to the high sensibility of M. sieversii to disturbance, we proposed more attention should be paid to the M. sieversii populations in the western mountains of the Junggar Basin.

Key words water-fertilizer coupling      water use efficiency      optimal coupling domain      yield      winter wheat     
Received: 04 March 2014      Published: 10 April 2015
Fund:  

This research was supported by the National Basic Research Special Program of China (2012FY111500), the Innovation Research Group Program of Chinese Academy of Sciences and State Administration of Foreign Experts Affairs of China (KZCX2-YW-T09), the State International Science and Technology Cooperation Program of China (2010DFA92720), and the Program of the Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences.

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Cite this article:

HongXiang ZHANG, MingLi ZHANG, LiNa WANG. Genetic structure and historical demography of Malus sieversii in the Yili Valley and the western mountains of the Junggar Basin, Xinjiang, China. Journal of Arid Land, 2015, 7(2): 264-271.

URL:

http://jal.xjegi.com/10.1007/s40333-014-0044-2     OR     http://jal.xjegi.com/Y2015/V7/I2/264

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