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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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Bar plot produced by STRUCTURE assuming 2 populations showed no separation. 1 and 2 indicate the samples from the island of Pueto Rico (1) and the satellite island, Vieques (2). And proportion of membership of each pre-defined population in 2 clusters.
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Figure 2: Bar plot produced by STRUCTURE assuming 2 populations showed no separation. 1 and 2 indicate the samples from the island of Pueto Rico (1) and the satellite island, Vieques (2). And proportion of membership of each pre-defined population in 2 clusters.

Mentions: The software program STRUCTURE did not separate sampled gAHB individuals into different populations. In Puerto Rico, gAHB population does not show any genetic structure (Fst = 0.0783) (Table 2), and is best described as one honey bee population (Figure 2), product of hybridization of AHB and EHB. All the loci showed similar low genetic differentiation in the Puerto Rico honey bee population (Table 2). In fact, the phylogenetic analyses revealed all sampled provinces, including those separated by geographical barriers to cluster together, regardless of location (Figure 3).


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)

Bar plot produced by STRUCTURE assuming 2 populations showed no separation. 1 and 2 indicate the samples from the island of Pueto Rico (1) and the satellite island, Vieques (2). And proportion of membership of each pre-defined population in 2 clusters.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 2: Bar plot produced by STRUCTURE assuming 2 populations showed no separation. 1 and 2 indicate the samples from the island of Pueto Rico (1) and the satellite island, Vieques (2). And proportion of membership of each pre-defined population in 2 clusters.
Mentions: The software program STRUCTURE did not separate sampled gAHB individuals into different populations. In Puerto Rico, gAHB population does not show any genetic structure (Fst = 0.0783) (Table 2), and is best described as one honey bee population (Figure 2), product of hybridization of AHB and EHB. All the loci showed similar low genetic differentiation in the Puerto Rico honey bee population (Table 2). In fact, the phylogenetic analyses revealed all sampled provinces, including those separated by geographical barriers to cluster together, regardless of location (Figure 3).

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