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- W1974809743 abstract "Recent studies suggest that single-locus microsatellite DNA markers have the potential to unambiguously resolve parentage among individuals in natural populations where maternity is known. However, their power for determining parentage when neither parent is known is unclear. Here we investigate the usefulness of microsatellite DNA markers to determine parentage in brood parasitic bird, the brown-headed cowbird (Molothrus ater), where for a given offspring, no a priori knowledge of either parent is available. Seven polymorphic microsatellite DNA markers isolated from brown-headed cowbirds and yellow warblers (Dendroica petechia) were used to genetically characterize an individually marked breeding population of male and female cowbirds at Delta Marsh, Manitoba. Forty-four- males, 21 females, and 61 cowbird chicks were genotyped at seven loci using DNA amplified from blood and tissue samples. The mean exclusion probabilities pooled across all seven loci were 0.9964 for meals and 0.9948 for females. Two null (non-amplifying) alleles at one locus were discovered and accounted for by constructing alternate nonoverlapping primer sets. Exclusion analyses performed using all individuals determined both paternity and maternity for 43 chicks and paternity only for 4 chicks. Another microsatellite locus was then used to determine paternity for three additional chicks. Relatedness analyses placed 12 of the 18 remaining chicks not assigned both maternity and paternity into four unique full sibling groups. Overall, 90.16% (55 of 61) of all offspring examined were placed into distinct parent/sibling groups, demonstrating that this marker set is extremely useful for parentage studies in this species." @default.
- W1974809743 created "2016-06-24" @default.
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- W1974809743 date "1999-01-01" @default.
- W1974809743 modified "2023-09-26" @default.
- W1974809743 title "Parentage and kinship studies in an obligate brood parasitic bird, the brown-headed cowbird (Molothrus ater), using microsatellite DNA markers" @default.
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- W1974809743 doi "https://doi.org/10.1093/jhered/90.1.182" @default.
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