Dispersal of Erythronium grandiflorum Pollen by Bumblebees: Implications for Gene Flow and Reproductive Success

Evolution ◽  
1989 ◽  
Vol 43 (3) ◽  
pp. 657 ◽  
Author(s):  
James D. Thomson ◽  
Barbara A. Thomson
Keyword(s):  
Gene Flow ◽  
Reproductive Success ◽  
Erythronium Grandiflorum

scholarly journals Oil collecting bees and Byrsonima cydoniifolia A. Juss. (Malpighiaceae) interactions: the prevalence of long-distance cross pollination driving reproductive success

2014 ◽  
Vol 86 (1) ◽  
pp. 347-358 ◽  
Author(s):  
MORGANA S. SAZAN ◽  
ANTONIO DIEGO M. BEZERRA ◽  
BRENO M. FREITAS
Keyword(s):  
Gene Flow ◽  
Reproductive Success ◽  
Reproductive System ◽  
Host Plants ◽  
Floral Biology ◽  
Self Incompatibility ◽  
Long Distance ◽  
Pollination Service ◽  
Cross Pollination

Oil-collecting bees are the natural pollinators of oil-flower plants, but little is known about the pollination process and the effectiveness of their pollination service to the reproductive success of their host plants. In species of Byrsonima the reproductive system have been described as auto-compatible or self-incompatible. We studied the reproductive system of Byrsonima cydoniifolia, the fructification by means of short, medium and long-distance cross pollinations, the morphology and floral biology and the pollination interactions with species of oil-collecting bees. By means of controlled pollinations we found self-incompatibility caused by abortion of most self-pollinated flowers and demonstrated that the prevailing cross pollination ensuring the reproductive success of B. cydoniifolia is the long-distance cross pollination and Centridini bees; Epicharis nigrita, particularly, are the pollinators promoting the gene flow between genetically distinct populations.

scholarly journals Allele frequency dynamics in a pedigreed natural population

2018 ◽  
Vol 116 (6) ◽  
pp. 2158-2164 ◽  
Author(s):  
Nancy Chen ◽  
Ivan Juric ◽  
Elissa J. Cosgrove ◽  
Reed Bowman ◽  
John W. Fitzpatrick ◽  
...  
Keyword(s):  
Gene Flow ◽  
Reproductive Success ◽  
Allele Frequency ◽  
Natural Population ◽  
Allele Frequencies ◽  
Frequency Change ◽  
Short Term ◽  
Individual Survival ◽  
Frequency Changes ◽  
Genetic Contributions

A central goal of population genetics is to understand how genetic drift, natural selection, and gene flow shape allele frequencies through time. However, the actual processes underlying these changes—variation in individual survival, reproductive success, and movement—are often difficult to quantify. Fully understanding these processes requires the population pedigree, the set of relationships among all individuals in the population through time. Here, we use extensive pedigree and genomic information from a long-studied natural population of Florida Scrub-Jays (Aphelocoma coerulescens) to directly characterize the relative roles of different evolutionary processes in shaping patterns of genetic variation through time. We performed gene dropping simulations to estimate individual genetic contributions to the population and model drift on the known pedigree. We found that observed allele frequency changes are generally well predicted by accounting for the different genetic contributions of founders. Our results show that the genetic contribution of recent immigrants is substantial, with some large allele frequency shifts that otherwise may have been attributed to selection actually due to gene flow. We identified a few SNPs under directional short-term selection after appropriately accounting for gene flow. Using models that account for changes in population size, we partitioned the proportion of variance in allele frequency change through time. Observed allele frequency changes are primarily due to variation in survival and reproductive success, with gene flow making a smaller contribution. This study provides one of the most complete descriptions of short-term evolutionary change in allele frequencies in a natural population to date.

Abiotic stress and transgenics: Implications for reproductive success and crop-to-wild gene flow in Brassicas

2010 ◽  
Vol 11 (6) ◽  
pp. 513-521 ◽  
Author(s):  
Sari J. Himanen ◽  
Anne-Marja Nerg ◽  
Guy M. Poppy ◽  
C. Neal Stewart ◽  
Jarmo K. Holopainen
Keyword(s):  
Abiotic Stress ◽  
Gene Flow ◽  
Reproductive Success

scholarly journals Allele frequency dynamics in a pedigreed natural population

2018 ◽  
Author(s):  
Nancy Chen ◽  
Ivan Juric ◽  
Elissa J. Cosgrove ◽  
Reed Bowman ◽  
John W. Fitzpatrick ◽  
...  
Keyword(s):  
Gene Flow ◽  
Reproductive Success ◽  
Allele Frequency ◽  
Natural Population ◽  
Allele Frequencies ◽  
Frequency Change ◽  
Short Term ◽  
Individual Survival ◽  
Frequency Changes ◽  
Genetic Contributions

ABSTRACTA central goal of population genetics is to understand how genetic drift, natural selection, and gene flow shape allele frequencies through time. However, the actual processes underlying these changes - variation in individual survival, reproductive success, and movement - are often difficult to quantify. Fully understanding these processes requires the population pedigree, the set of relationships among all individuals in the population through time. Here, we use extensive pedigree and genomic information from a long-studied natural population of Florida Scrub-Jays (Aphelocoma coerulescens) to directly characterize the relative roles of different evolutionary processes in shaping patterns of genetic variation through time. We performed gene dropping simulations to estimate individual genetic contributions to the population and model drift on the known pedigree. We found that observed allele frequency changes are generally well predicted by accounting for the different genetic contributions of founders. Our results show that the genetic contribution of recent immigrants is substantial, with some large allele frequency shifts that otherwise may have been attributed to selection actually due to gene flow. We identified a few SNPs under directional short-term selection after appropriately accounting for gene flow. Using models that account for changes in population size, we partitioned the proportion of variance in allele frequency change through time. Observed allele frequency changes are primarily due to variation in survival and reproductive success, with gene flow making a smaller contribution. This study provides one of the most complete descriptions of short-term evolutionary change in allele frequencies in a natural population to date.

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