Effects of allozyme variation on fitness components in Drosophila melanogaster

Serradilla, J. M.; Ayala, Francisco J.

doi:10.1007/bf00116635

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Association between fecundity and genotype was expected to be high, since fecundity is associated with the heterozygosity of allozymes in several organisms, including Mytilus (Rodhouse et al 1986), Drosophila (Serradilla & Ayala 1983) and Pinus 'ponderosa pine' (Linhart & Mitton 1985). Moreover, the correlation between size and fecundity in barnacles and the association between growth and GPI* genotype association in the present study further reinforced this expectation.…”

Section: Fecunditysupporting

confidence: 80%

Field evidence for an association between growth and protein polymorphism in the acorn barnacle Semibalanus balanoides

Véliz¹,

Bourget²,

Bernatchez³

2006

Mar. Ecol. Prog. Ser.

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Organisms living in highly heterogeneous environments are useful for examining the effects of associations between phenotypes and ecologically relevant genes in the field. Here, we tested the null hypothesis of no association between the variation in 2 fitness-related traits (growth and fecundity) and polymorphism at 2 enzymatic loci, MPI* and GPI*, known to be subject to strong spatial selection. We also tested if such an association was related to the intensity of genotype selection observed for both allozymes at sampling locations in 2 barnacle cohorts. For both cohorts, individuals with the GPI*286/286 genotype were larger in size than individuals with the GPI*100/100 genotype, particularly in sites and microhabitats south of the Miramichi Estuary, Gulf of St. Lawrence, Canada. This coincided with a reduced GPI*100/100 frequency in this region. In contrast, the growth-MPI* genotype association showed no clear pattern. Overall, our results indicate that the phenotype-genotype association differed strikingly between the 2 genes, and that both the growth-GPI* genotype association and genotype selection occur in localities south of the Miramichi Estuary only, and at different times during development, first a few days after settlement (genotype selection) and later through growth-genotype association.KEY WORDS: Natural selection · Phenotype-genotype association · Allozyme · MPI* · GPI* · Marine invertebrates Resale or republication not permitted without written consent of the publisher

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Section: Fecunditysupporting

confidence: 80%

Field evidence for an association between growth and protein polymorphism in the acorn barnacle Semibalanus balanoides

Véliz¹,

Bourget²,

Bernatchez³

2006

Mar. Ecol. Prog. Ser.

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“…Our results agree with those of the other authors that differences can only be observed under special conditions (Morgan, 1975;Watanabe and Watanabe, 1977;Van Delden et aL, 1978;Serradilla and Ayala, 1983) and that FF homozygotes are more viable than SS ones (Morgan, 1975;Watanabe and Watanabe, 1977;Van Delden et a!., 1978) although Serradilla and Ayala (1983) did not find a significant difference between them. Given the diversity of conditions, these coincidences are noteworthy.…”

Section: Fitness Differences Among Single-locus Genotypessupporting

confidence: 93%

Allozyme polymorphism at the αGpdh and Adh loci and fitness in Drosophila melanogaster

Izquierdo

Rubio

1989

Heredity

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We have studied in Drosophila melanogaster the effects of allozyme variation at the aGpdh and Adh loci on the following fitness components: female fecundity, egg hatchability, egg-to-adult survival under near-optimal and competitive conditions, rate of development under near-optimal and competitive conditions, and mating capacity of males. Significant effects of the aGpdh locus on rate of development under competitive conditions (SS> FS> SS), and of the Adh locus on egg hatchability (FF = SS> FS) and egg-to-adult survival under competitive conditions (FF> SS = FS) were revealed. Possible natural selection mechanisms involved in the maintenance of allozyme polymorphisms at the aGpdh and Adh loci are described. These mechanisms and the fitness of In(2L)t may account for the persistence and clinal distribution of the two allozyme polymorphisms in nature.

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“…The results are shown in Table 6, which gives the number of adult progeny expected for each mating type under the conditions of the experiment. Male underdominance was observed by Serradilla & Ayala (19836) in similar experiments with other loci of D. The male genotypes d o not show overdominance; rather, there is an apparent underdominance at high density, although the effect is small compared to the overdominance of the females.…”

Section: Resultssupporting

confidence: 59%

Fertility and viability at theSodlocus inDrosophila melanogaster: non-additive and asymmetric selection

1991

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Experiments were designed to test in Drosophila melanogaster the effect of mating type at the Sod locus on fertility and viability. The experiments show that fertility is neither additive (or multiplicative) nor symmetric, i.e. that the fertility of a mating type cannot be predicted from the average fertility of the two genotypes involved in the mating. There is no significant male x female interaction with respect or progeny viability; but the interaction is significant for productivity, i.e. when fertility and viability are jointly taken into account. There is overdominance with respect to female fertility, but not with respect to male fertility or to viability. There also is alloprocoptic selection with respect to fertility and with respect to productivity, i.e. matings between like homozygotes are less fertile and productive than matings between dissimilar homozygotes. Selection at the Sod locus yields stable polymorphic equilibria, with the frequency of the F allele predicted at P = 0-641 or 0-695, respectively for low and high larval density.

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Effects of allozyme variation on fitness components in Drosophila melanogaster

Cited by 5 publications

References 24 publications

Field evidence for an association between growth and protein polymorphism in the acorn barnacle Semibalanus balanoides

Field evidence for an association between growth and protein polymorphism in the acorn barnacle Semibalanus balanoides

Allozyme polymorphism at the αGpdh and Adh loci and fitness in Drosophila melanogaster

Fertility and viability at theSodlocus inDrosophila melanogaster: non-additive and asymmetric selection

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