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Yassin A, Gidaszewski N, Debat V, David JR. Long-term evolution of quantitative traits in the Drosophila melanogaster species subgroup. Genetica 2022; 150:343-353. [PMID: 36242716 DOI: 10.1007/s10709-022-00171-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 10/04/2022] [Indexed: 11/26/2022]
Abstract
Quantitative genetics aims at untangling the genetic and environmental effects on phenotypic variation. Trait heritability, which summarizes the relative importance of genetic effects, is estimated at the intraspecific level, but theory predicts that heritability could influence long-term evolution of quantitative traits. The phylogenetic signal concept bears resemblance to heritability and it has often been called species-level heritability. Under certain conditions, such as trait neutrality or contribution to phylogenesis, within-species heritability and between-species phylogenetic signal should be correlated. Here, we investigate the potential relationship between these two concepts by examining the evolution of multiple morphological traits for which heritability has been estimated in Drosophila melanogaster. Specifically, we analysed 42 morphological traits in both sexes on a phylogeny inferred from 22 nuclear genes for nine species of the melanogaster subgroup. We used Pagel's λ as a measurement of phylogenetic signal because it is the least influenced by the number of analysed taxa. Pigmentation traits showed the strongest concordance with the phylogeny, but no correlation was found between phylogenetic signal and heritability estimates mined from the literature. We obtained data for multiple climatic variables inferred from the geographical distribution of each species. Phylogenetic regression of quantitative traits on climatic variables showed a significantly positive correlation with heritability. Convergent selection, the response to which depends on the trait heritability, may have led to the null association between phylogenetic signal and heritability for morphological traits in Drosophila. We discuss the possible causes of discrepancy between both statistics and caution against their confusion in evolutionary biology.
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Affiliation(s)
- Amir Yassin
- Laboratoire Évolution, Génomes, Comportement et Écologie, CNRS, IRD, Université Paris-Saclay - Institut Diversité, Ecologie et Evolution du Vivant (IDEEV), 12 route 128, 91190, Gif- sur-Yvette, France.
- Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP50, 75005, Paris, France.
| | - Nelly Gidaszewski
- Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP50, 75005, Paris, France
| | - Vincent Debat
- Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP50, 75005, Paris, France
| | - Jean R David
- Laboratoire Évolution, Génomes, Comportement et Écologie, CNRS, IRD, Université Paris-Saclay - Institut Diversité, Ecologie et Evolution du Vivant (IDEEV), 12 route 128, 91190, Gif- sur-Yvette, France
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Mackay TFC, Lyman RF, Jackson MS, Terzian C, Hill WG. POLYGENIC MUTATION IN DROSOPHILA MELANOGASTER: ESTIMATES FROM DIVERGENCE AMONG INBRED STRAINS. Evolution 2017; 46:300-316. [PMID: 28564027 DOI: 10.1111/j.1558-5646.1992.tb02039.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/1991] [Accepted: 08/28/1991] [Indexed: 11/29/2022]
Abstract
A highly inbred line of Drosophila melanogaster was subdivided into 25 replicate sublines, which were independently maintained for 100 generations with 10 pairs of unselected flies per generation. The polygenic mutation rate (VM ) for two quantitative traits, abdominal and sternopleural bristle number, was estimated from divergence among sublines at 10 generation intervals from generations 30-100, and from response of each line to divergent selection after more than 65 generations of mutation accumulation. Estimates of VM averaged over males and females both from divergence among lines and from response to selection within lines were 3.3 × 10-3 VE for abdominal bristles and 1.5 × 10-3 VE for sternopleural bristles, where VE is the environmental variance. The actual rate of production of mutations affecting these traits may be considerably higher if the traits are under stabilizing selection, and if mutations affecting bristle number have deleterious effects on fitness. There was a substantial component of variance for sex × mutant effect interaction and the sublines evolved highly significant mutational variation in sex dimorphism of abdominal bristle number. Pleiotropic effects on sex dimorphism may be a general property of mutations at loci determining bristle number.
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Affiliation(s)
- Trudy F C Mackay
- Department of Genetics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JN, SCOTLAND.,Department of Genetics, Box 7614, North Carolina State University, Raleigh, North Carolina, 27695-7614, USA
| | - Richard F Lyman
- Department of Genetics, Box 7614, North Carolina State University, Raleigh, North Carolina, 27695-7614, USA
| | - Michael S Jackson
- Department of Genetics, Box 7614, North Carolina State University, Raleigh, North Carolina, 27695-7614, USA
| | - Christophe Terzian
- Department of Genetics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JN, SCOTLAND
| | - William G Hill
- Department of Genetics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JN, SCOTLAND
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