共 32 条
Species Selection Maintains Self-Incompatibility
被引:368
作者:
Goldberg, Emma E.
[1
]
Kohn, Joshua R.
[2
]
Lande, Russell
[3
]
Robertson, Kelly A.
[1
]
Smith, Stephen A.
[4
]
Igic, Boris
[1
]
机构:
[1] Univ Illinois, Dept Biol Sci, Chicago, IL 60607 USA
[2] Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093 USA
[3] Univ London Imperial Coll Sci Technol & Med, Div Biol, Ascot SL5 7PY, Berks, England
[4] Natl Evolutionary Synth Ctr, Durham, NC 27705 USA
来源:
基金:
美国国家科学基金会;
关键词:
MATING SYSTEMS;
POLYMORPHISM;
EVOLUTION;
DIVERSIFICATION;
FERTILIZATION;
SPECIATION;
DIVERSITY;
PLANTS;
RATES;
D O I:
10.1126/science.1194513
中图分类号:
O [数理科学和化学];
P [天文学、地球科学];
Q [生物科学];
N [自然科学总论];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
Identifying traits that affect rates of speciation and extinction and, hence, explain differences in species diversity among clades is a major goal of evolutionary biology. Detecting such traits is especially difficult when they undergo frequent transitions between states. Self-incompatibility, the ability of hermaphrodites to enforce outcrossing, is frequently lost in flowering plants, enabling self-fertilization. We show, however, that in the nightshade plant family (Solanaceae), species with functional self-incompatibility diversify at a significantly higher rate than those without it. The apparent short-term advantages of potentially self-fertilizing individuals are therefore offset by strong species selection, which favors obligate outcrossing.
引用
收藏
页码:493 / 495
页数:3
相关论文