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Title: Young dispersal of xerophil Nitraria lineages in intercontinental disjunctions of the Old World

Author: Zhang, Ming-Li; Temirbayeva, Kamshat; Sanderson, Stewart C.; Chen, X.;

Date: 2015

Source: Scientific Reports. 5: 13840.

Publication Series: Scientific Journal (JRNL)

Description: Many cases of intercontinental disjunct distributions of seed plants have been investigated, however few have concerned the continents of Eurasia (mainly Central Asia), Africa, and Australia, especially the xerophytic lineages are lacking. Nitraria (Nitrariaceae) is just one of these xerophytic lineages. Previous Nitraria studies have hypothesized either Africa as the ancient center, with dispersals to Australia and Eurasia, or alternatively Central Asia, due to a concentration of endemism and diversity there. Our findings show eastern Central Asia, i.e. the eastern Tethys, to be the correct place of origin. Dispersal westward to Africa occurred during the late Oligocene to Pliocene, whereas dispersal to Australia from western Central Asia was young since Pliocene 2.61 Ma. Two related tetraploids are indicated to have diversified in eastern Central Asia at approximately 5.89 Ma, while the Australian tetraploid N. billardieri, is an independently derived, recent dispersal from western Central Asia.

Keywords: dispersal, Nitraria, seed plants, xerophytic lineages

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Zhang, Ming-Li; Temirbayeva, Kamshat; Sanderson, Stewart C.; Chen, X. 2015. Young dispersal of xerophil Nitraria lineages in intercontinental disjunctions of the Old World. Scientific Reports. 5: 13840.

 


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