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Parallel loss of anthocyanins triggers the incipient sympatric speciation in an alpine ginger 认领 引用 被引量：1
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作者 Zhi-Li Zhou Tial C.Ling +9 位作者 Jian-Li Zhao Xin-Zhi Wang Lin-Lin Wang Li Li Wen-Jing Wang Dong-Rui Jia Zhi-Kun Wu Xu-Dong Sun Yong-Ping Yang Yuan-Wen Duan 《Plant Diversity》 SCIE CAS CSCD 2025年第3期429-439,共11页
Change of flower color can readily lead to a shift in pollinators,potentially causing pollinator mediated reproductive isolation or even speciation.Here,we examined the ecological and evolutionary consequences of flow... Change of flower color can readily lead to a shift in pollinators,potentially causing pollinator mediated reproductive isolation or even speciation.Here,we examined the ecological and evolutionary consequences of flower color polymorphism in Roscoea cautleoides,an alpine ginger with sympatric distribution of purple-and yellow-flowered plants.Variations in pollinator visitation and specialization to the flower color contributed greatly to pre-zygotic reproductive isolation,with post-zygotic isolation also observed in reciprocal pollination.Yellow-flowered plants evolved independently from purple-flowered plants in two populations due to the absence of anthocyanins,as supported by metabolic,expression,and genetic analysis.Despite early genetic divergence between the two-flower-colored plants,highly differentiated genes were associated with reproduction and stress,while highly selective genes were enriched in stress.Our results suggest that parallel loss of anthocyanins leads to flower color polymorphism in different populations of R.cautleoides,with pollinator preference contributing to reproductive isolation and subsequent genetic differentiation,indicating the process of incipient speciation triggered by flower color changes with sympatric distribution. 展开更多
关键词 Pollinator shift Reproductive isolation Differentially expressed genes Genetic differentiation Roscoea
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Molecular bases for parallel evolution of translucent bracts in an alpine "glasshouse" plant Rheum alexandrae (Polygonaceae) 认领 引用 被引量：2
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作者 Bing-Bing LIU Lars OPGENOORTH +5 位作者 Georg MIEHE Dong-Yuan ZHANG Dong-Shi WAN Chang-Ming ZHAO Dong-Rui JIA Jian-Quan LIU 《Journal of Systematics and Evolution》 SCIE CAS CSCD 2013年第2期134-141,共8页
Parallel evolution provides an excellent framework to infer the genetic bases of adaptive traits and understand the importance of natural selection in shaping current biodiversity. The upper leaves of the ＂glasshouse... Parallel evolution provides an excellent framework to infer the genetic bases of adaptive traits and understand the importance of natural selection in shaping current biodiversity. The upper leaves of the ＂glasshouse plants＂ transform into translucent bracts that show numerous adaptions in alpine habitats. It remains unknown whether similar molecular changes occur under the parallel bract evolution of different ＂glasshouse＂ species. In this study, we compared the results on phenotypic and physiological differences and presented the results of cDNA- AFLP analyses of transcriptional changes between translucent bracts and normal leaves in Rheum alexandrae. We also examined the homologous candidate genes with the same expression changes between this species and another ＂glasshouse＂ species, R. nobile. We found that bracts of R. alexandrae are similar to those of R. nobile in anatomical features： chloroplasts have degenerated and chlorophyll contents are greatly reduced, which suggests that foliar photosynthetic functions in bracts of both species have been reduced or totally altered. Among the 6000 transcript-derived fragments （TDFs） in bracts and leaves of R. alexandrae, 420 （7%） were differentially expressed （up- or downregulated） between bracts and normal leaves. There were a total of 13 homologous TDFs with the same expression changes between R. alexandrae and the previously studied R. nobile. Except for the two that were not functionally annotated, eight of the homologous TDFs were found to be involved in stress and defense responses whereas the other three were related to photosynthesis. The up- or downregulation of these candidate genes was highly congruent with anatomical characteristics and adaptive functions of the bracts found for ＂glasshouse＂ plants. These findings suggested that the ＂glasshouse＂ phenotypes may have common molecular bases underlying their parallel evolution of similar adaptive functions and highlighted the importance of the natural selection in producing such phenotypes. 展开更多
关键词 cDNA-AFLPs ＂glasshouse＂ plants parallel evolution Rheum alexandrae.
Range expansion, genetic differentiation, and phenotypic adaption of Hippopha(e) neurocarpa (Elaeagnaceae) on the Qinghai-Tibet Plateau 认领 引用
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作者 Yi-Xuan KOU Yu-Xia WU +2 位作者 Dong-Rui JIA Zhong-Hu LI Yu-Jin WANG 《Journal of Systematics and Evolution》 SCIE CAS CSCD 2014年第3期303-312,共10页
Plant species shift ranges in response to climate fluctuation over time.However,differentiation related to heterogeneity in space has been illustrated only rarely.Here we selected HippophaÃneurocarpa S.W.Liu&... Plant species shift ranges in response to climate fluctuation over time.However,differentiation related to heterogeneity in space has been illustrated only rarely.Here we selected HippophaÃneurocarpa S.W.Liu&T.N.Ho(Elaeagnaceae),a shrub endemic to the Qinghai-Tibet Plateau,to exemplify this process.We characterized the genotypic,phenotypic,and climatic variations among 27 populations of this species sampled across its entire distribution.Genotype analyses revealed six highly differentiated groups that may have resulted from expansions in spatial range.Despite recent fluctuation in size,it is likely that most groups survived the last glacial maximum in situ.Instead of two previously described subspecies,we identified four morphotypes(stellate,peltate,and two additional types)that can be characterized based on leaf trichomes.This phenotypic subdivision is consistent with a climate gradient defined by temperature and precipitation,although similar phenotypes may derive from distinct genotypes.Collectively,we propose that the demographic history of H.neurocarpa is characteristic of an early spatial range expansion combined with a recent bottleneck,subsequently subdivided into multiple morphotypes following local adaption to heterogeneous climates. 展开更多
关键词 genetic differentiation Hippopha(e)neurocarpa phenotypic adaption range expansion,Qinghai-Tibet Plateau Quaternary
Multiple lines of evidence supports the two varieties of Halenia elliptica(Gentianaceae)as two species 认领 引用 被引量：4
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作者 Jin-Feng Wu Dong-Rui Jia +5 位作者 Rui-Juan Liu Zhi-Li Zhou Lin-Lin Wang Min-Yu Chen Li-Hua Meng Yuan-Wen Duan 《Plant Diversity》 SCIE CAS CSCD 2022年第3期290-299,共10页
Delimiting species requires multiple sources of evidence.Here,we delimited two varieties of Halenia elliptica(Gentianaceae)using several lines of evidence,including morphological traits and mating system in a sympatri... Delimiting species requires multiple sources of evidence.Here,we delimited two varieties of Halenia elliptica(Gentianaceae)using several lines of evidence,including morphological traits and mating system in a sympatric population,phylogenetic relationships based on nrITS and cpDNA(rpl16)data,and complete chloroplast genome sequences.Comparative analysis of 21 morphological traits clearly separates the two varieties of H.elliptica.Examination of the flowering process and pollination treatments indicate that H.elliptica var.grandiflora produces seeds via outcrossing,whereas H.elliptica var.elliptica produces seeds via mixed mating.Furthermore,hand-pollinated hybridization of the two varieties produced no seeds.Observations of pollinators showed that when bees began a pollination bout on H.elliptica var.grandiflora they preferred to continue pollinating this variety;however,when they began a pollination bout on H.elliptica var.elliptica,they showed no preference for either variety.Phylogenetic analysis confirmed the monophyly of H.elliptica,which was further divided into two monophyletic clades corresponding to the two varieties.A large number of variants from the chloroplast genomes reflected remarkable genetic dissimilarities between the two varieties of H.elliptica.We recommend that the two varieties of H.elliptica should be revised as two species(H.elliptica and H.grandiflora).Our findings indicate that H.elliptica varieties may have split into two separate species due to a shift in mating system,changes in flowering phenology and/or post-pollination reproductive isolation. 展开更多
关键词 Halenia elliptica Flowering phenology Mating system Reproductive isolation Monophyly Species delimitation
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Evolutionary history of a desert perennial Arnebia szechenyi(Boraginaceae):Intraspecific divergence,regional expansion and asymmetric gene flow 认领 引用 被引量：1
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作者 Meng-Jiao Fu Hai-Yang Wu +1 位作者 Dong-Rui Jia Bin Tian 《Plant Diversity》 SCIE CAS CSCD 2021年第6期462-471,共10页
The complex interactions of historical,geological and climatic events on plant evolution have been an important research focus for many years.However,the role of desert formation and expansion in shaping the genetic s... The complex interactions of historical,geological and climatic events on plant evolution have been an important research focus for many years.However,the role of desert formation and expansion in shaping the genetic structures and demographic histories of plants occurring in arid areas has not been well explored.In the present study,we investigated the phylogeography of Arnebia szechenyi,a desert herb showing a near-circular distribution surrounding the Tengger Desert in Northwest China.We measured genetic diversity of populations using three maternally inherited chloroplast DNA(cpDNA)fragments and seven bi-paternally inherited nuclear DNA(nDNA)loci that were sequenced from individuals collected from 16 natural populations across its range and modelled current and historical potential habitats of the species.Our data indicated a considerably high level of genetic variation within A.szechenyi and noteworthy asymmetry in historical migration from the east to the west.Moreover,two nuclear genetic groups of populations were revealed,corresponding to the two geographic regions separated by the Tengger Desert.However,analysis of cpDNA data did not show significant geographic structure.The most plausible explanation for the discrepancy between our findings based on cpDNA and nDNA data is that A.szechenyi populations experienced long periods of geographic isolation followed by range expansion,which would have promoted generalized recombination of the nuclear genome.Our findings further highlight the important role that the Tengger Desert,together with the Helan Mountains,has played in the evolution of desert plants and the preservation of biodiversity in arid Northwest China. 展开更多
关键词 Asymmetric gene flow Cytonuclear discordance Desert growth Intraspecific divergence
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