PJB-2018-636
Karyotypes in 12 populations of Allium caeruleum from Tianshan mountains, Xinjiang, China
Xiao Bei Ma, Chen Yi Lin, Xin Zhang and Yuan Rong Ye
Abstract
Xinjiang is an important natural habitat for the wild genus Allium in Central Asia. The karyotypes of 12 populations of Allium caeruleum from Tianshan Mountains, Xinjiang, China were investigated in this paper. Results showed that all of the tested materials were diploid (2n=2x=16) which had M, m, sm and st types and the percentage of the total chromosome number was 1.04%, 68.75%, 25.00% and 5.21%, respectively. The satellite existed in six populations. The compositions of chromosome relative length were L, M2, M1 and S types. The percentage karyotype asymmetry index was 58.58% to 62.70%. Karyotypes was 2A or 2B. The higher evolutionary trend of karyotypes was in Zeketai population. The four groups were clustered at 5.5 genetic distance. The genetic diversity of chromosome compositions and unstable satellites were in 12 populations. The changes of chromosomes structure results in the genetic variability for adaptation of new habitats and it is one of the evolutional strategy.
To Cite this article:
Ma, X.B., C.Y. Lin, X. Zhang and Y.R. Ye. 2020. Karyotypes in 12 populations of Allium caeruleum from Tianshan mountains, Xinjiang, China. Pak. J. Bot., 52(5): DOI: http://dx.doi.org/10.30848/PJB2020-5(14)
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