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植物分类学报
植物分类学报

陈之端

双月刊

1674-4918

jse@ibcas.ac.cn

010-62836132，62836572

100093

北京香山南辛村20号中科院植物所内

植物分类学报/Journal Journal of Systematics and EvolutionCSCD北大核心CSTPCDSCI
查看更多>>《植物分类学报》于 1951 年创办。其前身为以下四种刊物：《静生生物调查所汇报》、《国立北平研究院植物学研究所丛刊》、《国立中央研究院植物汇报》、《中国科学社生物研究所植物部论文丛刊》。《植物分类学报》是我国生物学科历史最悠久的核心期刊，代表了我国植物分类学领域的最高学术水平，在国内外有深远的影响。所刊登的内容是生命科学各学科及农业、林业、医药、轻工及环境保护(包括生物多样性和保护生物学研究)和资源开发利用等行业有关学科的基础。《植物分类学报》是从事这些学科工作的必备参考刊物。
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    A haplotype-resolved genome for Rhododendron × pulchrum and the expression analysis of heat shock genes

    Jian-Shuang ShenLan LanSheng-Long KanHe-Feng Cheng...
    489-504页
    查看更多>>摘要：Rhododendron is the largest genus in Ericaceae and is well known for its diversity and beauty of flowers present in different species,making it a much-revered lineage of ornamental plants.Many species of Rhododendron are intolerant of high temperatures,which are becoming more common and intense in urban areas under global climate change.Therefore,the discovery and description of genes from heat-tolerant Rhododendron lineages are essential in the development of new climate-resilient cultivars.One such species known to be heat tolerant is Rhododendron × pulchrum Sweet.To better understand the genomics of heat tolerance in this species,we assembled a haplotype-resolved and chromosome-scale genome for R.× pulchrum,which had a genome size of 509 Mb;a scaffold N50 of 37 251 370 bp;and contained 35 610 genes.In addition,based on the same reannotation pipeline,we conducted pan-genomic analyses for all seven available chromosome-scale Rhododendron genomes and found 14415 gene groups shared across all species and 18018 gene groups distributed in the other species,including 1879 gene groups found in only a single species.Finally,we analyzed the transcriptomic data from heat-treated and non-heat-treated R.× pulchrum plants to quantify the genes that are most important during heat stress in an effort to inform the development of climate-resilient cultivars.This study provides insight into the genome diversity in Rhododendron and targets several genes related to agronomic traits that may help in further analysis.
      原文链接:
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    • NSTL
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    Linked selection and recombination rate generate both shared and lineage-specific genomic islands of divergence in two independent Quercus species pairs

    Yong ShiBiao-Feng ZhouYi-Ye LiangBaosheng Wang...
    505-519页
    查看更多>>摘要：A fundamental question in speciation genomics is how evolutionary processes shape the genomic landscape of differentiation between species.Regions of elevated diff erentiation,referred to as genomic islands,could be shared among closely related species(shared islands)or specific to a lineage(lineage-specific islands).Shared islands are typically assumed to result from background selection.However,simulations and empirical studies have suggested that positive selection contributes to both shared and lineage-specific islands.Here,we utilized comparative population genomics to examine the contributions of different evolutionary processes to patterns of genetic differentiation when gene flow and incomplete lineage sorting are minimal.We used whole-genome resequencing data for 135 individuals from four oak species,including two independent species pairs,Quercus variabilis Blume and Quercus acutissima Carruth.in the subgenus Cerris,and Quercus dentata Thunb.and Quercus griffithii Hook.f.& Thomson ex Miq.in the subgenus Quercus.We found that both shared and subgenus-specific islands were caused by positive selection,including selective sweeps in current populations and in their most recent common ancestors.Moreover,the recombination rate was a better predictor of genomic differentiation than gene density.Overall,our results reveal that recombination and positive selection impacted genomic differentiation considerably and provide a more precise grasp of how genomic islands formed in Quercus.
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    Phylogenetic and taxonomic relationships between morphotypes related to Elymus caninus(Poaceae)based on sequence of a nuclear gene GBSS1(waxy)and sexual hybridization

    Alexander V.AgafonovElena V.ShabanovaMaria V.EmtsevaSergey V.Asbaganov...
    520-533页
    查看更多>>摘要：We represent a comparative analysis of GBSS1 gene fragment sequences for a number of species related to Elymus caninus:Elymus prokudinii,Elymus viridiglumis,Elymus goloskokovii,as well as a number of morphologically deviating biotypes,inhabiting Russia and Kazakhstan.Microevolutionary relationships between species were assessed from dendrograms derived from sequences of exons and introns.In all taxa,the St subgenome was represented by St2 variants,rather typical of the North American ancestral line of Pseudoroegneria spicata than of the Asian line descending from Pseudoroegneria strigosa.All putative relatives of E.caninus had H1 subgenome variants linked around the Asian diploid carrier of the H genome from Hordeum jubatum and were divided into two subclades.One of them(H1-1)contained most of the closely related E.caninus clones,including Elymus uralensis.Another subclade(H1.2)consisted of five variants phylogenetically related to Elymus mutabilis.We have also studied reproductive relationships between species E.goloskokovii,E.prokudinii,and E.viridiglumis and the degree of their integration into the E.caninus complex.Biotypes included in sexual hybridization formed a single recombination gene pool,within which slight differences in reproductive compatibility were observed.A comprehensive study of microevolutionary differentiation of taxa showed the expediency of taxonomic revision.The species mentioned should probably be relegated to the infraspecific rank within E.caninus s.I.
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    DNA barcoding of recently diverging legume genera:Assessing the temperate Asian Caragana(Fabaceae:Papilionoideae)

    Shabir A.RatherJosphat K.SainaArjun AditHong-Mei Liu...
    534-547页
    查看更多>>摘要：Obtaining reliable species identification of the legume genus Caragana has been challenging.Until now,species identification was mostly carried out utilizing diagnostic morphological characteristics,in addition to some successful applications of secondary chemical compounds.This study was designed to establish a DNA barcoding protocol enabling unambiguous identification of 238 accessions belonging to 67 species of Caragana.The performance of four DNA barcoding regions nrITS,trnH-psbA,matK,and rbcL was explored using three analytical approaches,Pairwise Genetic Distance,Sequence Similarity and Phylogenetic Tree method.The chloroplast regions rbcL and matK showed lower discriminatory power compared with the nuclear region internal transcribed spacer(ITS)and the chloroplast region trnH-psbA.The nrITS outperformed the other regions in the resolution rate.The present study brings forth an efficient barcode locus for Caragana.A barcode based either on a single-locus nrITS or the combination of nrITS and trnH-psbA was found to be most suitable for species discrimination with distinctive barcoding gaps.An attempt has also been made to resolve taxonomic issues in the Caragana opulens complex.DNA barcoding tools when complemented with alpha taxonomic evidence can aid in solving complex systematic problems,especially when taxa are characterized by overlapping traits,such as species belonging to the Fabaceae family.
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    Mechanisms of reproductive isolation between annual and perennial plants of Incarvillea sinensis

    Wen-Juan LanFang-Yuan WangSpencer C.H.BarrettWen-Ting Wang...
    548-560页
    查看更多>>摘要：Quantifying the relative strength of isolating barriers is a major focus of research on plant speciation.Contrasting life histories and mating systems have the potential to limit gene exchange between closely related populations growing in sympatry.However,few studies have quantified reproductive isolating barriers between conspecific annual and perennial populations and their contributions to total reproductive isolation(RI).Incarvillea sinensis Lam.(Bignoniaceae)is an insect-pollinated herb with largely allopatric annual and perennial populations that differ in mating systems.The perennial populations are primarily outcrossing whereas annual populations are predominantly selfing.At a rare sympatric site in northern China we estimated prezygotic and postzygotic barriers to gene exchange between annual and perennial plants and found complete Rl between the two life histories.Annuals exhibited significantly higher ecogeographic isolation than perennials whereas perennials experienced more isolation through pollen-pistil interactions than annuals.Crosses between annuals and perennials demonstrated that postzygotic barriers influencing fruit and seed formation,F1 germination and survival were negligible for annuals but played a small role for perennials.However,F,hybrids of crosses between annuals and perennials produced no pollen and their ovules were largely sterile.Our study provides insight into the relative importance of prezygotic and postzygotic isolating barriers between closely related annual and perennial populations of I.sinensis and some of these barriers could have been involved with speciation.Annuals and perennials of I.sinensis represent two biological species and thus deserve to be recognized as distinct taxonomic species.
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    Mid-Pleistocene events influenced the current spatial structure of genetic diversity in Scots pine(Pinus sylvestris L.)

    Bartosz ?abiszakWitold Wachowiak
    561-576页
    查看更多>>摘要：Scots pine(Pinus sylvestris L.)is one of the most important tree species of the temperate and boreal zones in Eurasia.Its wide distribution range and current patterns of genetic variation have been influenced by Quaternary climatic oscillations and the demographic processes connected to them.In order to better understand the relationship between evolutionary history and demographic factors in a widespread species with a large genome,we used the single-nucleotide polymorphism(SNP)array to genotype thousands of SNP markers across 62 natural populations(N=686 trees)of Scots pine in Eurasia.This provides the largest range-wide SNPs'genetic diversity assessment of Scots pine to date.Our findings show evidence of past admixture events between genetic clusters that were retained despite the potential for effective pollen-mediated gene flow across the species'distribution range.We also examined the contemporary population structure of the species and analyzed the range-wide genetic diversity patterns.Phylogenetic analyses and demographic modeling suggest that the observed divergence patterns between genetic lineages likely predate the last glaciation events.Two of the most distinctive groups are represented by trees from the eastern parts of Fennoscandia and Eastern Russia,which have remained separated since the mid-Pleistocene.The patterns of genetic variation also confirm the dual colonization of Fennoscandia and the existence of an admixture zone in Central Europe that was formed during multiple waves of postglacial recolonization.This study provides insights into the genetic relationships of Scots pine populations from Europe and Asia and offers a more comprehensive understanding of the species'history.
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