Chloroplast DNA variation and phylogeography of <i>Ligularia tongolensis</i> (Asteraceae), a species endemic to the Hengduan Mountains region of China

Wang, Jinfeng; Pan, Yuezhi; Gong, Xun; Chiang, Yu–Chung; Kuroda, Chiaki

doi:10.1111/j.1759-6831.2011.00117.x

Cited by 26 publications

(15 citation statements)

References 58 publications

(60 reference statements)

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“…In the current study, two ancestral lineages of P. obconica (the Yunnan and Sichuan lineages) are located in the HHM, which split geographically with the 29°N latitudinal line. Similar genetic patterns were also found in other alpine plants in this area, such as Primula secundiflora [93] and Ligularia tongolensis [94]. Our results, based on intraspecific genetic data, support the hypothesis of a 29°N latitudinal geographic barrier, but warrants further evidences.…”

Section: Discussionsupporting

confidence: 88%

Population Expanding with the Phalanx Model and Lineages Split by Environmental Heterogeneity: A Case Study of Primula obconica in Subtropical China

et al. 2012

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BackgroundCurrent and historical events have both affected the current distribution patterns and intraspecific divergence of plants. While numerous studies have focused on the Qinghai-Tibetan Plateau (QTP), the impacts of such events on the flora of subtropical China remain poorly understood. Subtropical China is famous for its highly complex topography and the limited impact from glaciation during the Pleistocene; this may have resulted in a different genetic legacy for species in this region compared to fully glaciated areas.Methodology/Principal FindingsWe used plastid and nuclear DNA sequence data and distribution modeling to analyze the divergence patterns and demographic history of Primula obconica Hance, a widespread herbaceous montane species in subtropical China. The phylogenetic analysis revealed two major lineages (lineage A and lineage B), representing a west-east split into the Yunnan and Eastern groups, and the Sichuan and Central groups, respectively. The Eastern and Central groups comprised relatively new derived haplotypes. Nested Clade Analysis and Bayesian Skyline Plot analyses both indicated that P. obconica mainly experienced a gradual expansion of populations. In addition, the simulated distribution of P. obconica during the Last Glacial Maximum was slightly larger than its present-day distribution.Conclusion/SignificanceOur results are the first to identify a west-east migration of P. obconica. The gradual expansion pattern and a larger potential distribution range in cold periods detected for P. obconica indicate that the population expansion of this species is consistent with the phalanx model. In addition, the current patterns of genetic differentiation have persisted as a result of the extensive environmental heterogeneity that exists in subtropical China.

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Section: Discussionsupporting

confidence: 88%

Population Expanding with the Phalanx Model and Lineages Split by Environmental Heterogeneity: A Case Study of Primula obconica in Subtropical China

et al. 2012

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“…The hypothesis of rapid diversification was also confirmed from phylogeographic studies of widely distributed species in the HMD and adjacent regions, showing that a high level of genetic differentiation was found for allopatric populations of numerous species (e.g. Ge et al, 2005; Xia et al, 2005; Chen et al, 2008a, 2010b; Wang et al, 2008a, 2011; Xu et al, 2010). Except for the limited gene flow imposed by the complex topography, the Quaternary climatic oscillations in this region (Herzschuh et al, 2009) may have further accelerated this trend through genetic drifts in situ due to repeated bottlenecks (e.g.…”

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confidence: 61%

“…Hand.‐Mazz. ( h T = 0.86; Wang et al, 2011), Terminalia franchetii Gagnep. ( h T = 0.78; Zhang et al, 2011b), and Primula poissonii Franch.…”

Section: Discussionmentioning

confidence: 99%

“…It is interesting that the deep intraspecific divergences in the allopatric distributions were widely recorded in both plant and animal species in the HDM and adjacent QTP regions (Su et al, 2001; Wang et al, 2008a, 2008b; Wang et al, 2009; Chen et al, 2010b; Song et al, 2011; Wang et al, 2011; Zhang et al, 2011a). The dated timescales of the deep intraspecific divergences varied greatly, but mostly between 0.3 and 1.2 Ma, fitting well within the development of the largest glaciation evidenced by geological studies in China (Zhang et al, 2000; Shi, 2002).…”

Section: Discussionmentioning

confidence: 99%

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Phylogeography of Cyananthus delavayi (Campanulaceae) in Hengduan Mountains inferred from variation in nuclear and chloroplast DNA sequences

Sun

et al. 2012

J of Sytematics Evolution

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Phylogeographic studies on alpine plants endemic to the Hengduan Mountains of the southeastern Qinghai-Tibet Plateau are still limited in number. In this study, we used sequence variation of one nuclear gene (ncpGS, which encodes the chloroplastic glutamine synthetase) and in two chloroplast DNA segments to investigate the phylogeographic structure and population demographic history of Cyananthus delavayi, a narrow-range species endemic to this region. We identified eight chlorotypes and 16 nuclear genotypes in a survey of 10 populations sampled throughout the range of the species. The results of both phylogenetic and network analyses suggested that the genealogical relationships of both chlorotypes and nuclear genotypes showed a clear geographical correlation. High total genetic diversity, low levels of within-population diversity, and strong population differentiation (chloroplast DNA: h T = 0.827, h S = 0.087, N ST = 0.899, G ST = 0.895; nuclear DNA: h T = 0.910, h S = 0.348, N ST = 0719, G ST = 0.618) were identified. Based on the mismatch distribution analyses, no evidence of recent demographic population expansion was found for this species. Nested clade analyses of both chlorotypes and nuclear genotypes indicated that restricted gene flow resulting from isolation by distance and allopatric fragmentation were likely to have been the major processes that shaped their present-day spatial distribution. Our dating of the genetic divergences between three major geographic lineages suggested that the largest glaciation of the early Quaternary developed in the Qinghai-Tibet Plateau and mountainous isolation may have together led to deep intraspecific vicariance within this species.

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“…We also estimated phylogenetic relationships and divergence time applying a coalescent analytical approach as implemented in B east 1.5.4 (Drummond & Rambaut, 2007). As there is no fossil record for the genus, we used the rate of 1.52 × 10 −9 substitutions per site per year (s/s/y), a mutation rate proposed for chloroplast non‐coding regions of grass (Yamane et al, 2006) that has been used in phylogeographic studies on taxa of Asteraceae (Collevatti et al, 2009; Wang et al, 2011a). Five independent analyses were run for 4.0 × 10 7 generations under the GIR + G substitution model, which was chosen by hierarchical likelihood ratio tests implemented in Modeltest version 3.7 (Posada & Crandall, 1998).…”

Section: Methodsmentioning

confidence: 99%

Phylogeography of an alpine plant Ligularia vellerea (Asteraceae) in the Hengduan Mountains

Yang

Pan

et al. 2012

J of Sytematics Evolution

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The Hengduan Mountains region is considered to be an important reservoir and a differentiation center for temperate and alpine plants during the Cenozoic. To reveal the effects of extreme topography and climate on an organism's population genetic structure in this region, a phylogeographic study has been carried out for Ligularia vellerea. We sequenced two chloroplast DNA fragments, trnH-psbA and trnL-rpl32, for 157 individuals of 15 populations and a total of 14 haplotypes were identified. These haplotypes clustered into five clades and each of them was mainly distributed in the restricted regions. A strong phylogeographic structure of this species was detected (N ST = 0.851, G ST = 0.713; N ST > G ST , P < 0.01). The strong population differentiation in L. vellerea could be attributed to the repeated glacial/interglacial cycles during the Pleistocene, which has been further enhanced by restricted gene flow caused by the complicated topography in the Hengduan Mountains region that formed during the uplift of the Qinghai-Tibet Plateau.

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Chloroplast DNA variation and phylogeography of Ligularia tongolensis (Asteraceae), a species endemic to the Hengduan Mountains region of China

Cited by 26 publications

References 58 publications

Population Expanding with the Phalanx Model and Lineages Split by Environmental Heterogeneity: A Case Study of Primula obconica in Subtropical China

Population Expanding with the Phalanx Model and Lineages Split by Environmental Heterogeneity: A Case Study of Primula obconica in Subtropical China

Phylogeography of Cyananthus delavayi (Campanulaceae) in Hengduan Mountains inferred from variation in nuclear and chloroplast DNA sequences

Phylogeography of an alpine plant Ligularia vellerea (Asteraceae) in the Hengduan Mountains

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