Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird

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Kin selection theory predicts that extrapair mating should be rare in cooperatively breeding birds. However, most cooperative breeders are not genetically monogamous and the relationship between promiscuity and cooperative breeding remains unclear. This relationship is further complicated by a lack...

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Autores principales: Ursino, Cynthia Alejandra, De Mársico, María Cecilia, Reboreda, Juan Carlos
Publicado: 2017
Materias:
Agelaioides badius
cooperative breeding
extrapair mating
mating system
microsatellite markers
parentage analysis
brood parasitism
conspecific
genotype
kinship
parentage
passerine
reproductive strategy
Aves
Molothrus rufoaxillaris
Turdus merula
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v134_n2_p410_Ursino
http://hdl.handle.net/20.500.12110/paper_00048038_v134_n2_p410_Ursino
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00048038_v134_n2_p410_Ursino
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spelling paper:paper_00048038_v134_n2_p410_Ursino2023-06-08T14:29:42Z Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird Ursino, Cynthia Alejandra De Mársico, María Cecilia Reboreda, Juan Carlos Agelaioides badius cooperative breeding extrapair mating mating system microsatellite markers parentage analysis brood parasitism conspecific cooperative breeding genotype kinship parentage passerine reproductive strategy Aves Molothrus rufoaxillaris Turdus merula Kin selection theory predicts that extrapair mating should be rare in cooperatively breeding birds. However, most cooperative breeders are not genetically monogamous and the relationship between promiscuity and cooperative breeding remains unclear. This relationship is further complicated by a lack of data. The majority of cooperatively breeding birds live in the tropics, and their genetic mating systems are little known. Here we studied the genetic mating system of the Grayish Baywing (Agelaioides badius), a socially monogamous Neotropical blackbird in which most nesting pairs are assisted by helpers, previously assumed to be offspring of the breeding pair. Grayish Baywings are the primary host of the parasitic Screaming Cowbird (Molothrus rufoaxillaris), and previous studies have found a positive association between brood parasitism and helper recruitment in the last part of the nestling period. We used microsatellite markers to analyze the kinship of 192 individuals in 47 breeding groups, finding that 13% of 153 nestlings (in 38% of 47 nests) resulted from extrapair mating. We also documented 2 instances of conspecific brood parasitism and 1 instance of quasiparasitism (the nestling was sired by the social father, but was unrelated to the social mother). Of 8 helpers that were genotyped, 4 (all males) were offspring of the breeding pair and 4 (2 males, 2 females) were unrelated to both members of the breeding pair. None of the helpers produced offspring within the clutch. These results suggest that, although cooperative breeding is frequent, genetic relatedness between Grayish Baywing helpers and the offspring that they raise is highly variable. Future studies are needed to determine why unrelated helpers assist at Grayish Baywing nests, and to understand the role that brood parasitism may have played in the evolution of cooperative breeding in this species. © 2017 American Ornithological Society. Fil:Ursino, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De Mársico, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v134_n2_p410_Ursino http://hdl.handle.net/20.500.12110/paper_00048038_v134_n2_p410_Ursino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Agelaioides badius
cooperative breeding
extrapair mating
mating system
microsatellite markers
parentage analysis
brood parasitism
conspecific
cooperative breeding
genotype
kinship
parentage
passerine
reproductive strategy
Aves
Molothrus rufoaxillaris
Turdus merula
spellingShingle Agelaioides badius
cooperative breeding
extrapair mating
mating system
microsatellite markers
parentage analysis
brood parasitism
conspecific
cooperative breeding
genotype
kinship
parentage
passerine
reproductive strategy
Aves
Molothrus rufoaxillaris
Turdus merula
Ursino, Cynthia Alejandra
De Mársico, María Cecilia
Reboreda, Juan Carlos
Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
topic_facet Agelaioides badius
cooperative breeding
extrapair mating
mating system
microsatellite markers
parentage analysis
brood parasitism
conspecific
cooperative breeding
genotype
kinship
parentage
passerine
reproductive strategy
Aves
Molothrus rufoaxillaris
Turdus merula
description Kin selection theory predicts that extrapair mating should be rare in cooperatively breeding birds. However, most cooperative breeders are not genetically monogamous and the relationship between promiscuity and cooperative breeding remains unclear. This relationship is further complicated by a lack of data. The majority of cooperatively breeding birds live in the tropics, and their genetic mating systems are little known. Here we studied the genetic mating system of the Grayish Baywing (Agelaioides badius), a socially monogamous Neotropical blackbird in which most nesting pairs are assisted by helpers, previously assumed to be offspring of the breeding pair. Grayish Baywings are the primary host of the parasitic Screaming Cowbird (Molothrus rufoaxillaris), and previous studies have found a positive association between brood parasitism and helper recruitment in the last part of the nestling period. We used microsatellite markers to analyze the kinship of 192 individuals in 47 breeding groups, finding that 13% of 153 nestlings (in 38% of 47 nests) resulted from extrapair mating. We also documented 2 instances of conspecific brood parasitism and 1 instance of quasiparasitism (the nestling was sired by the social father, but was unrelated to the social mother). Of 8 helpers that were genotyped, 4 (all males) were offspring of the breeding pair and 4 (2 males, 2 females) were unrelated to both members of the breeding pair. None of the helpers produced offspring within the clutch. These results suggest that, although cooperative breeding is frequent, genetic relatedness between Grayish Baywing helpers and the offspring that they raise is highly variable. Future studies are needed to determine why unrelated helpers assist at Grayish Baywing nests, and to understand the role that brood parasitism may have played in the evolution of cooperative breeding in this species. © 2017 American Ornithological Society.
author Ursino, Cynthia Alejandra
De Mársico, María Cecilia
Reboreda, Juan Carlos
author_facet Ursino, Cynthia Alejandra
De Mársico, María Cecilia
Reboreda, Juan Carlos
author_sort Ursino, Cynthia Alejandra
title Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
title_short Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
title_full Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
title_fullStr Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
title_full_unstemmed Kinship and genetic mating system of the Grayish Baywing (Agelaioides badius), a cooperatively breeding Neotropical blackbird
title_sort kinship and genetic mating system of the grayish baywing (agelaioides badius), a cooperatively breeding neotropical blackbird
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00048038_v134_n2_p410_Ursino
http://hdl.handle.net/20.500.12110/paper_00048038_v134_n2_p410_Ursino
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AT demarsicomariacecilia kinshipandgeneticmatingsystemofthegrayishbaywingagelaioidesbadiusacooperativelybreedingneotropicalblackbird
AT reboredajuancarlos kinshipandgeneticmatingsystemofthegrayishbaywingagelaioidesbadiusacooperativelybreedingneotropicalblackbird
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