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Genetic variation in wild and cultivated populations of the haploid-diploid red alga Gracilaria chilensis: how farming practices favor asexual reproduction and heterozygosity.
Evolution. 2008 Jun; 62(6):1500-19.E

Abstract

The extent of changes in genetic diversity and life-history traits associated with farming was investigated in the haploid-diploid red alga, Gracilaria chilensis, cultivated in Chile. This alga belongs to one of the most frequently cultivated seaweed genera around the world. Fifteen farmed populations, 11 wild populations, and two subspontaneous populations were sampled along the Chilean coast. The frequency of reproductive versus vegetative individuals and of haploid versus diploid individuals was checked in each population. In addition, the distribution of genetic variation in wild and cultivated populations was analyzed using six microsatellite markers. Our results first demonstrated that farmed populations are maintained almost exclusively by vegetative propagation. Moreover, the predominance of diploid individuals in farms showed that farming practices had significantly modified life-history traits as compared to wild populations. Second, the expected reduction in genetic diversity due to a cultivation bottleneck and subsequent clonal propagation was detected in farms. Finally, our study suggested that cultural practices in the southern part of the country contributed to the spread of selected genotypes at a local scale. Altogether, these results document for the first time that involuntary selection could operate during the first step of domestication in a marine plant.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Guillemin ML
Instituto de Ecologia y Evolucion, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile. mguillemin@uach.cl
Faugeron S
No affiliation info available
Destombe C
No affiliation info available
Viard F
No affiliation info available
Correa JA
No affiliation info available
Valero M
No affiliation info available

MeSH

AgricultureChileGenetic VariationGenetics, PopulationGenotypeGracilariaLinkage DisequilibriumMicrosatellite RepeatsPloidiesReproduction, Asexual

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18346220

Citation

Guillemin, Marie-Laure, et al. "Genetic Variation in Wild and Cultivated Populations of the Haploid-diploid Red Alga Gracilaria Chilensis: How Farming Practices Favor Asexual Reproduction and Heterozygosity." Evolution; International Journal of Organic Evolution, vol. 62, no. 6, 2008, pp. 1500-19.
Guillemin ML, Faugeron S, Destombe C, et al. Genetic variation in wild and cultivated populations of the haploid-diploid red alga Gracilaria chilensis: how farming practices favor asexual reproduction and heterozygosity. Evolution. 2008;62(6):1500-19.
Guillemin, M. L., Faugeron, S., Destombe, C., Viard, F., Correa, J. A., & Valero, M. (2008). Genetic variation in wild and cultivated populations of the haploid-diploid red alga Gracilaria chilensis: how farming practices favor asexual reproduction and heterozygosity. Evolution; International Journal of Organic Evolution, 62(6), 1500-19. https://doi.org/10.1111/j.1558-5646.2008.00373.x
Guillemin ML, et al. Genetic Variation in Wild and Cultivated Populations of the Haploid-diploid Red Alga Gracilaria Chilensis: How Farming Practices Favor Asexual Reproduction and Heterozygosity. Evolution. 2008;62(6):1500-19. PubMed PMID: 18346220.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genetic variation in wild and cultivated populations of the haploid-diploid red alga Gracilaria chilensis: how farming practices favor asexual reproduction and heterozygosity. AU - Guillemin,Marie-Laure, AU - Faugeron,Sylvain, AU - Destombe,Christophe, AU - Viard,Frederique, AU - Correa,Juan A, AU - Valero,Myriam, Y1 - 2008/03/12/ PY - 2008/3/19/pubmed PY - 2008/9/4/medline PY - 2008/3/19/entrez SP - 1500 EP - 19 JF - Evolution; international journal of organic evolution JO - Evolution VL - 62 IS - 6 N2 - The extent of changes in genetic diversity and life-history traits associated with farming was investigated in the haploid-diploid red alga, Gracilaria chilensis, cultivated in Chile. This alga belongs to one of the most frequently cultivated seaweed genera around the world. Fifteen farmed populations, 11 wild populations, and two subspontaneous populations were sampled along the Chilean coast. The frequency of reproductive versus vegetative individuals and of haploid versus diploid individuals was checked in each population. In addition, the distribution of genetic variation in wild and cultivated populations was analyzed using six microsatellite markers. Our results first demonstrated that farmed populations are maintained almost exclusively by vegetative propagation. Moreover, the predominance of diploid individuals in farms showed that farming practices had significantly modified life-history traits as compared to wild populations. Second, the expected reduction in genetic diversity due to a cultivation bottleneck and subsequent clonal propagation was detected in farms. Finally, our study suggested that cultural practices in the southern part of the country contributed to the spread of selected genotypes at a local scale. Altogether, these results document for the first time that involuntary selection could operate during the first step of domestication in a marine plant. SN - 0014-3820 UR - https://www.unboundmedicine.com/medline/citation/18346220/Genetic_variation_in_wild_and_cultivated_populations_of_the_haploid_diploid_red_alga_Gracilaria_chilensis:_how_farming_practices_favor_asexual_reproduction_and_heterozygosity_ DB - PRIME DP - Unbound Medicine ER -