Phylogenetic analyses of Phragmites spp. in southwest China identified two lineages and their hybrids
Phylogenetic analyses of Phragmites spp. in southwest China identified two lineages and their hybrids
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DOI：
10.1007/s00606-017-1403-1
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发表时间：
2017-03
影响因子：
1.9
通讯作者：
Takashi S. T. Tanaka;C. Irbis;T. Inamura
中科院分区：
文献类型：
--
作者：
Takashi S. T. Tanaka;C. Irbis;T. Inamura
The species/lineage delimitation and possible hybridization/introgression are prerequisites in the management of invasive organism.Phragmites australisinvaded diverse habitats and displaced the native lineages in North America as a consequence of the introduction from the Eurasia. Such species threatened the biodiversity safety of the invaded regions, in particular the biodiversity hot spots. Southwest (SW) China is a biodiversity hot spot with the occurrence ofPhragmitesspecies, both native and introduced. However, the genetic identity ofPhragmitesspecies in this biodiversity hot spot remains unclear, hampering effective ecological managements. In this study, we explored the phylogenetic lineages ofPhragmitesspecies in SW China. A total of 44 accessions sampled across SW China were analyzed using two chloroplast DNA (cpDNA) markers and amplified fragment length polymorphisms. Two genetic lineages were recovered, i.e., (1) the tropical lineage which primarily consisted of nativePhragmitesspecies represented by cpDNA haplotypes I, Q, and U in relatively low altitude and (2) the common lineage including native species at higher elevations in the Hengduan Mountains as well as artificially planted species represented by cpDNA haplotype P. The between-lineage hybridization was suggested for five analyzed accessions collected from either natural or artificial habitats. The putative hybrids might have originated from the maternal native tropical lineages and paternal introduced common lineage. Our results suggest the likelihood of introgressive hybridizations in SW China and thus provided implications for future research and ecological management.
