Genetic variability and phenotypic plasticity of metric thoracic traits in an invasive drosophilid in America.
| Title: | Genetic variability and phenotypic plasticity of metric thoracic traits in an invasive drosophilid in America. |
|---|---|
| Authors: | Bitner-Mathé BC; Departamento de Genética, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho, 373, Sala A2-109, Bloco A, Edifício do Centro de Ciências da Saúde, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, RJ, 21941 902, Brazil, bcbitner@biologia.ufrj.br.; David JR |
| Source: | Genetica [Genetica] 2015 Aug; Vol. 143 (4), pp. 441-51. Date of Electronic Publication: 2015 May 29. |
| Publication Type: | Journal Article; Research Support, Non-U.S. Gov't |
| Language: | English |
| Journal Info: | Publisher: Kluwer Academic Country of Publication: Netherlands NLM ID: 0370740 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-6857 (Electronic) Linking ISSN: 00166707 NLM ISO Abbreviation: Genetica Subsets: MEDLINE |
| Imprint Name(s): | Publication: Dordrecht : Kluwer Academic; Original Publication: s'-Gravenhage. |
| MeSH Terms: | Genetic Variation* ; Phenotype* ; Quantitative Trait, Heritable*; Drosophilidae/*anatomy & histology ; Drosophilidae/*genetics; Animals ; Body Size ; Female ; Male ; Pigmentation ; Sex Characteristics |
| Abstract: | Thermal phenotypic plasticity of 5 metric thoracic traits (3 related to size and 2 to pigmentation) was investigated in Zaprionus indianus with an isofemale line design. Three of these traits are investigated for the first time in a drosophilid, i.e. thorax width and width of pigmented longitudinal white and black stripes. The reaction norms of white and black stripes were completely different: white stripes were insensitive to growth temperature while the black stripes exhibited a strong linear decrease with increasing temperatures. Thorax width exhibited a concave reaction norm, analogous but not identical to those of wing length and thorax length: the temperatures of maximum value were different, the highest being for thorax width. All traits exhibited a significant heritable variability and a low evolvability. Sexual dimorphism was very variable among traits, being nil for white stripes and thorax width, and around 1.13 for black stripes. The ratio thorax length to thorax width (an elongation index) was always >1, showing that males have a more rounded thorax at all temperatures. Black stripes revealed a significant increase of sexual dimorphism with increasing temperature. Shape indices, i.e. ratios between size traits all exhibited a linear decrease with temperature, the least sensitive being the elongation index. All these results illustrate the complexity of developmental processes but also the analytical strength of biometrical plasticity studies in an eco-devo perspective. |
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| Entry Date(s): | Date Created: 20150529 Date Completed: 20160324 Latest Revision: 20181113 |
| Update Code: | 20260130 |
| DOI: | 10.1007/s10709-015-9843-4 |
| PMID: | 26018013 |
| Database: | MEDLINE |
Journal Article; Research Support, Non-U.S. Gov't