Asymmetric introgression in the horticultural living fossil Cycas sect. Asiorientales using a genome-wide scanning approach

Yu Chung Chiang, Bing Hong Huang, Chun Wen Chang, Yu Ting Wan, Shih Jie Lai, Shong Huang, Pei Chun Liao

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The Asian cycads are mostly allopatric, distributed in small population sizes. Hybridization between allopatric species provides clues in determining the mechanism of species divergence. Horticultural introduction provides the chance of interspecific gene flow between allopatric species. Two allopatrically eastern Asian Cycas sect. Asiorientales species, C. revoluta and C. taitungensis, which are widely distributed in Ryukyus and Fujian Province and endemic to Taiwan, respectively, were planted in eastern Taiwan for horticultural reason. Higher degrees of genetic admixture in cultivated samples than wild populations in both cycad species were detected based on multilocus scans by neutral AFLP markers. Furthermore, bidirectional but asymmetric introgression by horticultural introduction of C. revoluta is evidenced by the reanalyses of species associated loci, which are assumed to be diverged after species divergence. Partial loci introgressed from native cycad to the invaders were also detected at the loci of strong species association. Consistent results tested by all neutral loci, and the species-associated loci, specify the recent introgression from the paradox of sharing of ancestral polymorphisms. Phenomenon of introgression of cultivated cycads implies niche conservation among two geographic-isolated cycads, even though the habitats of the extant wild populations of two species are distinct.

Original languageEnglish
Pages (from-to)8228-8251
Number of pages24
JournalInternational journal of molecular sciences
Volume14
Issue number4
DOIs
Publication statusPublished - 2013 Apr

Fingerprint

Cycas
genome
fossils
loci
Polymorphism
Taiwan
Conservation
Genes
Genome
Scanning
scanning
Gene Flow
Population Density
Population
Ecosystem
divergence
habitats
polymorphism
paradoxes
admixtures

Keywords

  • AFLP
  • Cycas revoluta
  • Cycas taitungensis
  • Horticulture
  • Introgression

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Asymmetric introgression in the horticultural living fossil Cycas sect. Asiorientales using a genome-wide scanning approach. / Chiang, Yu Chung; Huang, Bing Hong; Chang, Chun Wen; Wan, Yu Ting; Lai, Shih Jie; Huang, Shong; Liao, Pei Chun.

In: International journal of molecular sciences, Vol. 14, No. 4, 04.2013, p. 8228-8251.

Research output: Contribution to journalArticle

Chiang, Yu Chung ; Huang, Bing Hong ; Chang, Chun Wen ; Wan, Yu Ting ; Lai, Shih Jie ; Huang, Shong ; Liao, Pei Chun. / Asymmetric introgression in the horticultural living fossil Cycas sect. Asiorientales using a genome-wide scanning approach. In: International journal of molecular sciences. 2013 ; Vol. 14, No. 4. pp. 8228-8251.
@article{a02d24299e07475882494f1015c9dd58,
title = "Asymmetric introgression in the horticultural living fossil Cycas sect. Asiorientales using a genome-wide scanning approach",
abstract = "The Asian cycads are mostly allopatric, distributed in small population sizes. Hybridization between allopatric species provides clues in determining the mechanism of species divergence. Horticultural introduction provides the chance of interspecific gene flow between allopatric species. Two allopatrically eastern Asian Cycas sect. Asiorientales species, C. revoluta and C. taitungensis, which are widely distributed in Ryukyus and Fujian Province and endemic to Taiwan, respectively, were planted in eastern Taiwan for horticultural reason. Higher degrees of genetic admixture in cultivated samples than wild populations in both cycad species were detected based on multilocus scans by neutral AFLP markers. Furthermore, bidirectional but asymmetric introgression by horticultural introduction of C. revoluta is evidenced by the reanalyses of species associated loci, which are assumed to be diverged after species divergence. Partial loci introgressed from native cycad to the invaders were also detected at the loci of strong species association. Consistent results tested by all neutral loci, and the species-associated loci, specify the recent introgression from the paradox of sharing of ancestral polymorphisms. Phenomenon of introgression of cultivated cycads implies niche conservation among two geographic-isolated cycads, even though the habitats of the extant wild populations of two species are distinct.",
keywords = "AFLP, Cycas revoluta, Cycas taitungensis, Horticulture, Introgression",
author = "Chiang, {Yu Chung} and Huang, {Bing Hong} and Chang, {Chun Wen} and Wan, {Yu Ting} and Lai, {Shih Jie} and Shong Huang and Liao, {Pei Chun}",
year = "2013",
month = "4",
doi = "10.3390/ijms14048228",
language = "English",
volume = "14",
pages = "8228--8251",
journal = "International Journal of Molecular Sciences",
issn = "1661-6596",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "4",

}

TY - JOUR

T1 - Asymmetric introgression in the horticultural living fossil Cycas sect. Asiorientales using a genome-wide scanning approach

AU - Chiang, Yu Chung

AU - Huang, Bing Hong

AU - Chang, Chun Wen

AU - Wan, Yu Ting

AU - Lai, Shih Jie

AU - Huang, Shong

AU - Liao, Pei Chun

PY - 2013/4

Y1 - 2013/4

N2 - The Asian cycads are mostly allopatric, distributed in small population sizes. Hybridization between allopatric species provides clues in determining the mechanism of species divergence. Horticultural introduction provides the chance of interspecific gene flow between allopatric species. Two allopatrically eastern Asian Cycas sect. Asiorientales species, C. revoluta and C. taitungensis, which are widely distributed in Ryukyus and Fujian Province and endemic to Taiwan, respectively, were planted in eastern Taiwan for horticultural reason. Higher degrees of genetic admixture in cultivated samples than wild populations in both cycad species were detected based on multilocus scans by neutral AFLP markers. Furthermore, bidirectional but asymmetric introgression by horticultural introduction of C. revoluta is evidenced by the reanalyses of species associated loci, which are assumed to be diverged after species divergence. Partial loci introgressed from native cycad to the invaders were also detected at the loci of strong species association. Consistent results tested by all neutral loci, and the species-associated loci, specify the recent introgression from the paradox of sharing of ancestral polymorphisms. Phenomenon of introgression of cultivated cycads implies niche conservation among two geographic-isolated cycads, even though the habitats of the extant wild populations of two species are distinct.

AB - The Asian cycads are mostly allopatric, distributed in small population sizes. Hybridization between allopatric species provides clues in determining the mechanism of species divergence. Horticultural introduction provides the chance of interspecific gene flow between allopatric species. Two allopatrically eastern Asian Cycas sect. Asiorientales species, C. revoluta and C. taitungensis, which are widely distributed in Ryukyus and Fujian Province and endemic to Taiwan, respectively, were planted in eastern Taiwan for horticultural reason. Higher degrees of genetic admixture in cultivated samples than wild populations in both cycad species were detected based on multilocus scans by neutral AFLP markers. Furthermore, bidirectional but asymmetric introgression by horticultural introduction of C. revoluta is evidenced by the reanalyses of species associated loci, which are assumed to be diverged after species divergence. Partial loci introgressed from native cycad to the invaders were also detected at the loci of strong species association. Consistent results tested by all neutral loci, and the species-associated loci, specify the recent introgression from the paradox of sharing of ancestral polymorphisms. Phenomenon of introgression of cultivated cycads implies niche conservation among two geographic-isolated cycads, even though the habitats of the extant wild populations of two species are distinct.

KW - AFLP

KW - Cycas revoluta

KW - Cycas taitungensis

KW - Horticulture

KW - Introgression

UR - http://www.scopus.com/inward/record.url?scp=84877079440&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877079440&partnerID=8YFLogxK

U2 - 10.3390/ijms14048228

DO - 10.3390/ijms14048228

M3 - Article

C2 - 23591840

AN - SCOPUS:84877079440

VL - 14

SP - 8228

EP - 8251

JO - International Journal of Molecular Sciences

JF - International Journal of Molecular Sciences

SN - 1661-6596

IS - 4

ER -