PJB-2024-140
Genetic structure and phylogeographic of Tulipa iliensis
Douwen Qin, Weiqiang Liu, Jiting Tian, Yulong Yao and Xiuting Ju
Abstract
Biogeographical barriers to gene flow are central to plant phylogeography. Tulipa iliensis are mainly distributed in Xinjiang in China. Field survey found that there were differences in plant phenotypes traits among different populations of Tulipa iliensis at different altitudes. However, few studies have investigated how altitude affects the genetic diversity of species that are distributed in this area. Due to slow evolution and conserved sequences, cpDNA is widely used in phylogenetic analysis, species identification, and species origin studies. Here we used chloroplast DNA fragments of rbcLaF-rbcL to examine genetic diversity and distribution patterns of 7 populations of Tulipa iliensis. The distribution pattern based on cpDNA data showed that the rbcLaF-rbcL fragment had 312 variable sites in sampling area, and a total of 6 haplotypes were obtained, among which haplotypes Hap-1 and Hap-2 were ancient haplotypes. The genetic diversity is rich and the variation mainly comes from within populations, but there is a certain gene flow between populations. There is no abvious phylogeographic structure and no recent expansion in the sampling area, and the population size remains stable. The analysis of suitable areas showed that Bio13 (Precipitation of Wettest Month) and Bio14 (Precipitation of Driest Month) were the key factors affecting the distribution of Tulipa iliensis in China. From the three paleoclimates, current, and future climate scenarios, Tulipa iliensis suitability the distribution range of suitable areas of Tulipa iliensis in China showed a shrinking trend and migrated to higher latitudes. This study lays a foundation for the subsequent research on the history of Tulipa iliensis pedigree, adaptive traits, and analysis of stress response mechanisms.
To Cite this article:
Qin, D., W. Liu, J. Tian, Y. Yao and X. Ju. 2025. Genetic structure and phylogeographic of Tulipa iliensis. Pak. J. Bot., 57(4): DOI: http://dx.doi.org/10.30848/PJB2025-4(15)
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