Arid
DOI10.1086/339237
Phenotypic differentiation between three ancient hybrid taxa and their parental species
Rosenthal, DM; Schwarzbach, AE; Donovan, LA; Raymond, O; Rieseberg, LH
通讯作者Rieseberg, LH
来源期刊INTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN1058-5893
出版年2002
卷号163期号:3页码:387-398
英文摘要

The primary requirement for a new diploid species to arise via hybridization is ecological divergence from its parental species. Ecological divergence protects the nascent hybrid species from competition with its progenitor species and may contribute to reproductive isolation. However, the means by which hybridization might facilitate the necessary adaptive transitions are poorly understood. Here, we report the results of a glasshouse experiment in which 42 morphological and ecophysiological traits were measured in three hybrid sunflower species (Helianthus anomalus, Helianthus deserticola, and Helianthus paradoxus) and their parental species (Helianthus annuus and Helianthus petiolaris). A surprisingly high proportion of traits were extreme relative to the parental species (24%, 20%, and 39% of traits in H. anomalus, H. deserticola, and H. paradoxus, respectively). Most of the extreme traits have previously been reported in the literature as adaptations to dune (H. anomalus), high-desert (H. deserticola), or high-salt (H. paradoxus) habitats. We propose that hybridization has contributed to ecological divergence largely via the generation of extreme traits in segregating hybrids, a commonly observed phenomenon called "transgressive segregation."


英文关键词adaptation ecological divergence Helianthus hybridization photosynthesis speciation sunflower transgressive segregation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000174783500005
WOS关键词WATER-USE EFFICIENCY ; CARBON-ISOTOPE DISCRIMINATION ; NUCLEAR RIBOSOMAL DNA ; HELIANTHUS ASTERACEAE ; SALT TOLERANCE ; TRANSGRESSIVE SEGREGATION ; SARCOBATUS-VERMICULATUS ; RETICULATE EVOLUTION ; WILD SUNFLOWERS ; CHLOROPLAST DNA
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/142821
作者单位(1)Indiana Univ, Dept Biol, Bloomington, IN 47405 USA;(2)Kent State Univ, Dept Biol Sci, Kent, OH 44242 USA;(3)Univ Georgia, Dept Bot, Athens, GA 30602 USA
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GB/T 7714
Rosenthal, DM,Schwarzbach, AE,Donovan, LA,et al. Phenotypic differentiation between three ancient hybrid taxa and their parental species[J],2002,163(3):387-398.
APA Rosenthal, DM,Schwarzbach, AE,Donovan, LA,Raymond, O,&Rieseberg, LH.(2002).Phenotypic differentiation between three ancient hybrid taxa and their parental species.INTERNATIONAL JOURNAL OF PLANT SCIENCES,163(3),387-398.
MLA Rosenthal, DM,et al."Phenotypic differentiation between three ancient hybrid taxa and their parental species".INTERNATIONAL JOURNAL OF PLANT SCIENCES 163.3(2002):387-398.
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