ANALYSIS OF INBREEDING DEPRESSION IN MIXED-MATING PLANTS PROVIDES EVIDENCE FOR SELECTIVE INTERFERENCE AND STABLE MIXED MATING

被引:166
|
作者
Winn, Alice A. [1 ]
Elle, Elizabeth [2 ]
Kalisz, Susan [3 ]
Cheptou, Pierre-Olivier [4 ]
Eckert, Christopher G. [5 ]
Goodwillie, Carol [6 ]
Johnston, Mark O. [7 ]
Moeller, David A. [8 ]
Ree, Richard H. [9 ]
Sargent, Risa D. [10 ]
Vallejo-Marin, Mario [11 ]
机构
[1] Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306 USA
[2] Simon Fraser Univ, Dept Biol Sci, Burnaby, BC V5A 1S6, Canada
[3] Univ Pittsburgh, Dept Biol Sci, Pittsburgh, PA 15260 USA
[4] UMR 5175 CEFE CNRS, F-34293 Montpellier 05, France
[5] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada
[6] E Carolina Univ, Dept Biol, Greenville, NC 27858 USA
[7] Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, Canada
[8] Univ Minnesota, Dept Plant Biol, St Paul, MN 55108 USA
[9] Field Museum Nat Hist, Dept Bot, Chicago, IL 60605 USA
[10] Univ Ottawa, Dept Biol, Ottawa, ON K1N 6N5, Canada
[11] Univ Stirling, Stirling FK9 4LA, Scotland
基金
美国国家科学基金会;
关键词
Age-specific expression of inbreeding depression; gynodioecy; mating-system evolution; outcrossing; purging; selfing; EPILOBIUM-ANGUSTIFOLIUM ONAGRACEAE; SCHIEDEA-LYDGATEI CARYOPHYLLACEAE; MIMULUS-GUTTATUS SCROPHULARIACEAE; DECODON-VERTICILLATUS LYTHRACEAE; CLARKIA-TEMBLORIENSIS ONAGRACEAE; DATURA-STRAMONIUM SOLANACEAE; EUCALYPTUS-REGNANS MUELL; F; CREPIS-SANCTA ASTERACEAE; REDCEDAR THUJA-PLICATA; MENZIESII MIRB FRANCO;
D O I
10.1111/j.1558-5646.2011.01462.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Hermaphroditic individuals can produce both selfed and outcrossed progeny, termed mixed mating. General theory predicts that mixed-mating populations should evolve quickly toward high rates of selfing, driven by rapid purging of genetic load and loss of inbreeding depression (ID), but the substantial number of mixed-mating species observed in nature calls this prediction into question. Lower average ID reported for selfing than for outcrossing populations is consistent with purging and suggests that mixed-mating taxa in evolutionary transition will have intermediate ID. We compared the magnitude of ID from published estimates for highly selfing (r > 0.8), mixed-mating (0.2 =r= 0.8), and highly outcrossing (r < 0.2) plant populations across 58 species. We found that mixed-mating and outcrossing taxa have equally high average lifetime ID (d= 0.58 and 0.54, respectively) and similar ID at each of four life-cycle stages. These results are not consistent with evolution toward selfing in most mixed-mating taxa. We suggest that prevention of purging by selective interference could explain stable mixed mating in many natural populations. We identify critical gaps in the empirical data on ID and outline key approaches to filling them.
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页码:3339 / 3359
页数:21
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