Phylogeography and genetic structure of a Tertiary relict tree species,Tapiscia sinensis(Tapisciaceae): implications for conservation

Abstract

Climatic oscillations during the Pleistocene have had pronounced effects on the extant distribution of Tapiscia relative to the Last Glacial Maximum (LGM). Spatial patterns of molecular variation and ENM suggest that T. sinensis may have retreated in south-western and central China and colonized eastern China prior to the LGM. Multiple montane refugia for T. sinense existing during the LGM are inferred in central and western China. The populations adjacent to or within these refugia of T. sinense should be given high priority in the development of conservation policies and management strategies for this endangered species.

Population genetic structure, migration, and polyploidy origin of a medicinal species Gynostemma pentaphyllum (Cucurbitaceae)

“…The more abundant the genetic variation of a species is, the more adaptable it is. Species in this region commonly have unique haplotypes, and the level of genetic differentiation among glacial refugia is usually high because of random allele fixation (Hewitt, 2000;Zhang et al, 2015). Subtropical China was a Pleistocene refugium for many ancient species during the Pleistocene glacial and interglacial cycles (e.g., Wang et al, 2009).…”

“…Subtropical China was a Pleistocene refugium for many ancient species during the Pleistocene glacial and interglacial cycles (e.g., Wang et al, 2009). Species in this region commonly have unique haplotypes, and the level of genetic differentiation among glacial refugia is usually high because of random allele fixation (Hewitt, 2000;Zhang et al, 2015).…”

“…Many species of this area have unique haplotypes with high levels of genetic diversity. Moreover, the level of genetic differentiation among glacial refugia should be high because of the random fixation of alleles (Hewitt, 2000;Zhang et al, 2015).…”

“…Subtropical China is thought to have acted as a refugium for many ancient species during the Pleistocene glacial and interglacial cycles (e.g., Wang, Gao, Kang, Lowe, & Huang, 2009). Moreover, the level of genetic differentiation among glacial refugia should be high because of the random fixation of alleles (Hewitt, 2000;Zhang et al, 2015). Moreover, the level of genetic differentiation among glacial refugia should be high because of the random fixation of alleles (Hewitt, 2000;Zhang et al, 2015).…”

Long‐distance dispersal or postglacial contraction? Insights into disjunction between Himalaya–Hengduan Mountains and Taiwan in a cold‐adapted herbaceous genus, Triplostegia

“…Multiple refugia have been inferred in the Hengduan Mts. for many animals and plants during the Pleistocene glacial periods (Gao et al, 2007;Sun et al, 2014;Wen et al, 2014;Ye et al, 2014;Zhang et al, 2015).…”