The genetic relatedness in groups of joint-nesting Taiwan yuhinas: Low genetic relatedness with preferences for male kin

Mark Liu, Quen Dian Zhong, Yi Ru Cheng, Shou Hsien Li, Shu Fang, Chang En Pu, Hsiao Wei Yuan, Sheng Feng Shen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The relative importance of direct and indirect fitness and, thus, the role of kinship in the evolution of social behavior is much debated. Studying the genetic relatedness of interacting individuals is crucial to improving our understanding of these issues. Here, we used a seven-year data set to study the genetic structure of the Taiwan yuhina (Yuhina brunneciceps), a joint-nesting passerine. Ten microsatellite loci were used to investigate the pairwised relatedness among yuhina breeding group members. We found that the average genetic relatedness between same-sex group members was very low (0.069 for male dyads and 0.016 for female dyads). There was also a low ratio of closely-related kin (r>0.25) in the cooperative breeding groups of yuhinas (21.59% and 9.68%for male and female dyads, respectively). However, the relatedness of male dyads within breeding groups was significantly higher than female dyads. Our results suggest that yuhina cooperation is maintained primarily by direct fitness benefits to individuals; however, kin selection might play a role in partner choice for male yuhinas. Our study also highlights an important, but often neglected, question: Why do animals form non-kin groups, if kin are available? We use biological market theory to propose an explanation for group formation of unrelated Taiwan yuhinas.

Original languageEnglish
Article number0127341
JournalPloS one
Volume10
Issue number6
DOIs
Publication statusPublished - 2015 Jun 18

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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