Arid
DOI10.1093/aob/mcp033
Effect of variation in self-incompatibility on pollen limitation and inbreeding depression in Flourensia cernua (Asteraceae) scrubs of contrasting density
Ferrer, Miriam M.1; Good-Avila, Sara V.2; Montana, Carlos3; Dominguez, Cesar A.4; Eguiarte, Luis E.4
通讯作者Ferrer, Miriam M.
来源期刊ANNALS OF BOTANY
ISSN0305-7364
出版年2009
卷号103期号:7页码:1077-1089
英文摘要

Selection may favour a partial or complete loss of self-incompatibility (SI) if it increases the reproductive output of individuals in the presence of low mate availability. The reproductive output of individuals varying in their strength of SI may also be affected by population density via its affect on the spatial structuring and number of S-alleles in populations. Modifiers increasing levels of self-compatibility can be selected when self-compatible individuals receive reproductive compensation by, for example, increasing seed set and/or when they become associated with high fitness genotypes.


The effect of variation in the strength of SI and scrub density (low versus high) on seed set, seed germination and inbreeding depression in seed germination (delta(germ)) was investigated in the partially self-incompatible species Flourensia cernua by analysing data from self-, cross- and open-pollinated florets.


Examination of 100 plants in both high and low scrub densities revealed that 51% of plants were strongly self-incompatible and 49 % varied from being self-incompatible to self-compatible. Seed set after hand cross-pollination was higher than after open-pollination for self-incompatible, partially self-incompatible and self-compatible plants but was uniformly low for strongly self-incompatible plants. Strongly self-incompatible and self-incompatible plants exhibited lower seed set, seed germination and multiplicative female fitness (floral display x seed set x seed germination) in open-pollinated florets compared with partially self-incompatible and self-compatible plants. Scrub density also had an effect on seed set and inbreeding depression: in low-density scrubs seed set was higher after open-pollination and delta(germ) was lower.


These data suggest that (a) plants suffered outcross pollen limitation, (b) female fitness in partially self-incompatible and self-compatible plants is enhanced by increased mate-compatibility and (c) plants in low-density scrubs received higher quality pollen via open-pollination than plants in high-density scrubs.


英文关键词Flourensia cernua population density seed set seed germination female fitness partial self-incompatibility Mapimi Biosphere Reserve
类型Article
语种英语
国家Mexico ; Canada
收录类别SCI-E
WOS记录号WOS:000265267700008
WOS关键词SQUALIDUS L. ASTERACEAE ; CAMPANULA-RAPUNCULOIDES CAMPANULACEAE ; BREEDING SYSTEM ; MATING-SYSTEM ; POPULATION-GENETICS ; FLOWERING PLANTS ; FRUIT-SET ; EVOLUTIONARY CONSEQUENCES ; REPRODUCTIVE COMPENSATION ; CHIHUAHUAN DESERT
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构Universidad Nacional Autónoma de México
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/159717
作者单位1.Univ Autonoma Yucatan, Dept Ecol, Merida 97000, Yucatan, Mexico;
2.Univ Winnipeg, Dept Biol, Winnipeg, MB R3B 2E9, Canada;
3.Inst Ecol AC, Xalapa 91070, Veracruz, Mexico;
4.Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, Mexico
推荐引用方式
GB/T 7714
Ferrer, Miriam M.,Good-Avila, Sara V.,Montana, Carlos,et al. Effect of variation in self-incompatibility on pollen limitation and inbreeding depression in Flourensia cernua (Asteraceae) scrubs of contrasting density[J]. Universidad Nacional Autónoma de México,2009,103(7):1077-1089.
APA Ferrer, Miriam M.,Good-Avila, Sara V.,Montana, Carlos,Dominguez, Cesar A.,&Eguiarte, Luis E..(2009).Effect of variation in self-incompatibility on pollen limitation and inbreeding depression in Flourensia cernua (Asteraceae) scrubs of contrasting density.ANNALS OF BOTANY,103(7),1077-1089.
MLA Ferrer, Miriam M.,et al."Effect of variation in self-incompatibility on pollen limitation and inbreeding depression in Flourensia cernua (Asteraceae) scrubs of contrasting density".ANNALS OF BOTANY 103.7(2009):1077-1089.
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