دورية أكاديمية
أعرض في EDS

Maintenance of mixed mating after the loss of self-incompatibility in a long-lived perennial herb.

التفاصيل البيبلوغرافية
العنوان: Maintenance of mixed mating after the loss of self-incompatibility in a long-lived perennial herb.
المؤلفون: Voillemot M; Department of Ecology and Evolution, Biophore Building, University of Lausanne, CH-1015 Lausanne, Switzerland marie.voillemot@unil.ch., Pannell JR; Department of Ecology and Evolution, Biophore Building, University of Lausanne, CH-1015 Lausanne, Switzerland.
المصدر: Annals of botany [Ann Bot] 2017 Jan; Vol. 119 (1), pp. 177-190. Date of Electronic Publication: 2016 Dec 10.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Oxford University Press Country of Publication: England NLM ID: 0372347 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8290 (Electronic) Linking ISSN: 03057364 NLM ISO Abbreviation: Ann Bot Subsets: MEDLINE
أسماء مطبوعة: Publication: 2002- : Oxford, UK : Oxford University Press
Original Publication: Oxford [etc.]
مواضيع طبية MeSH: Linaria/*physiology , Pollination/*physiology , Self-Incompatibility in Flowering Plants/*physiology, Crosses, Genetic ; Fruit/physiology ; Genetic Variation ; Linaria/genetics ; Reproduction/physiology ; Seeds/physiology ; Spain
مستخلص: Background and Aims: Many hermaphroditic plants avoid self-fertilization by means of a molecular self-incompatibility (SI) system, a complex trait that is difficult to evolve but relatively easy to lose. Loss of SI is a prerequisite for an evolutionary transition from obligate outcrossing to self-fertilization, which may bring about rapid changes in the genetic diversity and structure of populations. Loss of SI is also often followed by the evolution of a 'selfing syndrome', with plants having small flowers, little nectar and few pollen grains per ovule. Here, we document the loss of SI in the long-lived Spanish toadflax Linaria cavanillesii, which has led to mixed mating rather than a transition to a high rate of selfing and in which an outcrossing syndrome has been maintained.
Methods: We performed crosses within and among six populations of L. cavanillesii in the glasshouse, measured floral traits in a common-garden experiment, performed a pollen-limitation experiment in the field and conducted population genetic analyses using microsatellites markers.
Key Results: Controlled crosses revealed variation in SI from fully SI through intermediate SI to fully self-compatible (SC). Flowers of SC individuals showed no evidence of a selfing syndrome. Although the SC population of L. cavanillesii had lower within-population genetic diversity than SI populations, as expected, population differentiation among all populations was extreme and represents an F ST outlier in the distribution for both selfing and outcrossing species of flowering plants.
Conclusions: Together, our results suggest that the transition to SC in L. cavanillesii has probably been very recent, and may have been aided by selection during or following a colonization bottleneck rather than in the absence of pollinators. We find little indication that the transition to SC has been driven by selection for reproductive assurance under conditions currently prevailing in natural populations.
(© The Author 2016. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
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فهرسة مساهمة: Keywords: Fruit set; Linaria cavanillesii; genetic diversity; mixed mating; outcrossing; pollen limitation; reproductive assurance; self-incompatibility; selfing syndrome
تواريخ الأحداث: Date Created: 20161213 Date Completed: 20170821 Latest Revision: 20190109
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC5218368
DOI: 10.1093/aob/mcw203
PMID: 27941096
قاعدة البيانات: MEDLINE
الوصف
تدمد:1095-8290
DOI:10.1093/aob/mcw203