Body size reaction norms  in Drosophila melanogaster:  temporal stability and genetic  architecture in a natural population

Karan, Dev; Morin, Jean‐Philippe; Gravot, Emmanuelle; Moréteau, B.; David, Jean R.

doi:10.1051/gse:19990505

Cited by 23 publications

(43 citation statements)

References 3 publications

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“…For D. melanogaster, this medium prevents any significant variation of morphometrical traits according to larval density (Karan et al, 1999b). Such is not the case for Z. indianus.…”

Section: Methodsmentioning

confidence: 89%

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

David

Araripe²,

Bitner‐Mathé

et al. 2005

Heredity

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Five natural samples of a recent South America invader, the drosophilid Zaprionus indianus, were investigated with the isofemale line technique. These samples were compared to five African mainland populations, investigated with the same method. The results were also compared to data obtained on mass cultures of other populations from Africa and India. Three quantitative traits were measured on both sexes, wing and thorax length and sternopleural bristle number. We did not find any latitudinal trend among the American samples, while a significant increase in body size with latitude was observed in the Indian and, to a lesser degree, in the African populations. American populations were also characterized by their bigger size. Genetic variability, estimated by the intraclass correlation among isofemale lines, was similar in American and African populations. The intraline, nongenetic variability was significantly less in the American samples, suggesting a better developmental stability, the origin of which is unclear. A positive relationship was evident between intraline variability of size traits and the wing-thorax length correlation. Altogether, our data suggest that the colonizing propagule introduced to Brazil had a fairly large size, preventing any bottleneck effect being detected. The big body size of American flies suggests that they came from a high-latitude African country. The lack of a latitudinal cline in America seems to be related to the short time elapsed since introduction. The very rapid spread of Z. indianus all over South America suggests that it might rapidly invade North America.

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“…For D. melanogaster, this medium prevents any significant variation of morphometrical traits according to larval density (Karan et al, 1999b). Such is not the case for Z. indianus.…”

Section: Methodsmentioning

confidence: 89%

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

David

Araripe²,

Bitner‐Mathé

et al. 2005

Heredity

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“…In this case, lines were investigated after four generations in the laboratory. We have evidence (Karan et al, 1999a) that the characteristics of the Bordeaux population remain stable in different years. For the purpose of the present comparison, we investigated only 10 lines from that population.…”

Section: Methodsmentioning

confidence: 90%

“…Population larval density was not accurately determined, but ranged between 100 and 200 adults per vial. The use of a high nutrient food prevents any significant impact of crowding on morphometrical traits (see Karan et al, 1999a).…”

Section: Methodsmentioning

confidence: 99%

Microspatial structure of Drosophila melanogaster populations in Brazzaville: evidence of natural selection acting on morphometrical traits

et al. 2003

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Two genetically distinct habitat races of Drosophila melanogaster coexist in Brazzaville (Congo). One is the typical field type of Afrotropical populations, the other mainly breeds in beer residues in breweries. These two populations differ in their ethanol tolerance, in their allelic frequencies at several enzyme and microsatellite loci and in the composition of their cuticular hydrocarbons. The brewery population is quite similar to European temperate populations with regard to all these traits. Previous investigations of two morphological traits (ovariole number and sternopleural bristle number) failed to detect any difference between the two habitat races. Here we investigated other morphological traits (wing and thorax length, thorax pigmentation and female abdomen pigmentation). The reaction norms of these traits according to growth temperature were compared in the two Afrotropical habitat races and in a French temperate population. As expected, the French population was very different from the field African population: as a general rule, the brewery population (Kronenbourg) was intermediate in several aspects between the other two. We conclude that the strong selective forces that maintain the genetic divergence between the two habitat races also act on morphometrical traits, and the possible selective mechanisms are discussed.

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“…In their work, among-line variances for all five traits tended to be higher at 12°C than at 25°C. In other isofemale line studies, in which thorax and wing length were examined (de Moed et al, 1997;Karan et al, 1999;Imasheva et al, 2000), a clear-cut trend for an increase in the among-line variances at low temperatures was also demonstrated. However, in the experiment with parent-offspring comparisons Sgrò and Hoffmann (1998) did not find a difference between 14°C and 28°C (the latter seems to be a suboptimal rather than a stressful temperature; see for example David et al, 1983) in the genetic variance of wing length, while for developmental time this variance was significantly lower at 14°C.…”

Section: Discussionmentioning

confidence: 99%

“…The data suggest that the effect of stressful temperature may be trait-specific and this warns against generalizations about the behaviour of genetic variation under extreme conditions. Heredity (2002) 89, 70-75. doi:10.1038/sj.hdy.6800104 Imasheva et al, 1998Imasheva et al, , 1999Imasheva et al, , 2000Karan et al, 1999;Loeschcke et al, 1999) in which genetic parameters have been estimated using the isofemale line technique, ie, a modified full-sib design with isofemale lines treated as families (Hoffmann and Parsons, 1988). However, the full-sib design is the least precise among all quantitative genetics methods developed to estimate additive genetic variance.…”

Section: Introductionmentioning

confidence: 99%

Effect of low stressful temperature on genetic variation of five quantitative traits in Drosophila melanogaster

Bubliy

Loeschcke

2002

Heredity

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A half-sib analysis was used to investigate genetic variation for three morphological traits (thorax length, wing length and sternopleural bristle number) and two life-history traits (developmental time and larva-to-adult viability) in Drosophila melanogaster reared at a standard (25°C) and a low stressful (13°C) temperature. Both phenotypic and environmental variation showed a significant increase under stressful conditions in all traits. For estimates of genetic variation, no statistically significant differences were found between the two environments. Narrow heritabilities tended to be higher at 13°C for sternopleural bristle number and viability and at 25°C for wing length and developmental time,

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Body size reaction norms in Drosophila melanogaster: temporal stability and genetic architecture in a natural population

Cited by 23 publications

References 3 publications

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

Microspatial structure of Drosophila melanogaster populations in Brazzaville: evidence of natural selection acting on morphometrical traits

Effect of low stressful temperature on genetic variation of five quantitative traits in Drosophila melanogaster

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