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Genetic structure of the gentle Africanized honey bee population (gAHB) in Puerto Rico.

Galindo-Cardona A, Acevedo-Gonzalez JP, Rivera-Marchand B, Giray T - BMC Genet. (2013)

Bottom Line: The genetic variability in this Africanized population was similar to that reported in studies from Texas.Two loci with European private alleles, one on Linkage Group 7, known to carry two known defensiveness Quantitative Trait Loci (QTLs), and the other on Linkage Group 1, known to carry three functionally studied genes and 11 candidate genes associated with Varroa resistance mechanisms were respectively, significantly greater or lower in European allele frequency than the other loci with European private alleles.Genetic structure of Puerto Rico gAHB differs from mainland AHB populations, probably representing evolutionary processes on the island.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Crops and AgroEnvironmental Sciences, Agricultural Experimental Station, University of Puerto Rico, Mayaguez, South Botanical Garden, Guayacán St. 1193, San Juan PR 00926, Puerto Rico. coleopterino@gmail.com

ABSTRACT

Background: The Africanized honey bee is one of the most spectacular invasions in the Americas. African bees escaped from apiaries in Brazil in 1956, spread over Americas and by 1994 they were reported in Puerto Rico. In contrast to other places, the oceanic island conditions in Puerto Rico may mean a single introduction and different dynamics of the resident European and new-coming Africanized bees.To examine the genetic variation of honey bee feral populations and colonies from different locations in Puerto Rico, we used eight known polymorphic microsatellite loci.

Results: In Puerto Rico, gAHB population does not show any genetic structure (Fst = 0.0783), and is best described as one honey bee population, product of hybridization of AHB and EHB. The genetic variability in this Africanized population was similar to that reported in studies from Texas. We observed that European private allele frequencies are high in all but one locus. This contrasts with mainland Africanized populations, where European allele frequencies are diminished. Two loci with European private alleles, one on Linkage Group 7, known to carry two known defensiveness Quantitative Trait Loci (QTLs), and the other on Linkage Group 1, known to carry three functionally studied genes and 11 candidate genes associated with Varroa resistance mechanisms were respectively, significantly greater or lower in European allele frequency than the other loci with European private alleles.

Conclusions: Genetic structure of Puerto Rico gAHB differs from mainland AHB populations, probably representing evolutionary processes on the island.

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Map of Puerto Rico with apiaries sampled (triangle) and the research apiary (star).
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Figure 1: Map of Puerto Rico with apiaries sampled (triangle) and the research apiary (star).

Mentions: The main island of Puerto Rico lies between 17°45′ N and 18°30′ N, and its longitude ranges from about 65°45′ W to 67°15′ W (Figure 1). With 8740 km2 surface area, Puerto Rico is the smallest and eastern most of the Greater Antilles. Vieques and Culebra Islands lie a short distance, 10 km southeast and 27 km east of the main island, respectively. Vieques and Culebra are the westernmost of the Lesser Antilles, which extend in a southeasterly arc from Puerto Rico to the northern coast of South America [32].


Genetic structure of the gentle Africanized honey bee population (gAHB) in Puerto Rico.

Galindo-Cardona A, Acevedo-Gonzalez JP, Rivera-Marchand B, Giray T - BMC Genet. (2013)

Map of Puerto Rico with apiaries sampled (triangle) and the research apiary (star).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750330&req=5

Figure 1: Map of Puerto Rico with apiaries sampled (triangle) and the research apiary (star).
Mentions: The main island of Puerto Rico lies between 17°45′ N and 18°30′ N, and its longitude ranges from about 65°45′ W to 67°15′ W (Figure 1). With 8740 km2 surface area, Puerto Rico is the smallest and eastern most of the Greater Antilles. Vieques and Culebra Islands lie a short distance, 10 km southeast and 27 km east of the main island, respectively. Vieques and Culebra are the westernmost of the Lesser Antilles, which extend in a southeasterly arc from Puerto Rico to the northern coast of South America [32].

Bottom Line: The genetic variability in this Africanized population was similar to that reported in studies from Texas.Two loci with European private alleles, one on Linkage Group 7, known to carry two known defensiveness Quantitative Trait Loci (QTLs), and the other on Linkage Group 1, known to carry three functionally studied genes and 11 candidate genes associated with Varroa resistance mechanisms were respectively, significantly greater or lower in European allele frequency than the other loci with European private alleles.Genetic structure of Puerto Rico gAHB differs from mainland AHB populations, probably representing evolutionary processes on the island.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Crops and AgroEnvironmental Sciences, Agricultural Experimental Station, University of Puerto Rico, Mayaguez, South Botanical Garden, Guayacán St. 1193, San Juan PR 00926, Puerto Rico. coleopterino@gmail.com

ABSTRACT

Background: The Africanized honey bee is one of the most spectacular invasions in the Americas. African bees escaped from apiaries in Brazil in 1956, spread over Americas and by 1994 they were reported in Puerto Rico. In contrast to other places, the oceanic island conditions in Puerto Rico may mean a single introduction and different dynamics of the resident European and new-coming Africanized bees.To examine the genetic variation of honey bee feral populations and colonies from different locations in Puerto Rico, we used eight known polymorphic microsatellite loci.

Results: In Puerto Rico, gAHB population does not show any genetic structure (Fst = 0.0783), and is best described as one honey bee population, product of hybridization of AHB and EHB. The genetic variability in this Africanized population was similar to that reported in studies from Texas. We observed that European private allele frequencies are high in all but one locus. This contrasts with mainland Africanized populations, where European allele frequencies are diminished. Two loci with European private alleles, one on Linkage Group 7, known to carry two known defensiveness Quantitative Trait Loci (QTLs), and the other on Linkage Group 1, known to carry three functionally studied genes and 11 candidate genes associated with Varroa resistance mechanisms were respectively, significantly greater or lower in European allele frequency than the other loci with European private alleles.

Conclusions: Genetic structure of Puerto Rico gAHB differs from mainland AHB populations, probably representing evolutionary processes on the island.

Show MeSH
Related in: MedlinePlus