GENOMIC COADAPTATION AND DEVELOPMENTAL STABILITY WITHIN INTROGRESSED POPULATIONS OF<i>ENNEACANTHUS GLORIOSUS</i>AND<i>E. OBESUS</i>(PISCES, CENTRARCHIDAE)

Graham, John H.; Felley, James D.

doi:10.1111/j.1558-5646.1985.tb04083.x

Cited by 77 publications

(37 citation statements)

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“…cucullata was developmentally more unstable than the other two taxa. In earlier empirical studies, both animal and plant hybrids have shown greater variability and less developmental stability than their parent populations (Strauss 1987;Ross and Robertson 1990;Graham and Felley 1985;Leary et al 1985). D. cucullata´galeata hybrids, however, displayed equal levels of developmental instability to D. galeata and less developmental instability than D. cucullata.…”

Section: Discussionmentioning

confidence: 88%

“…Developmental instability is random variation in individual development and is de®ned as phenotypic variation among individuals with identical genotypes living in an uniform environment (Scheiner et al 1991;Yampolsky and Scheiner 1994). It is generally assumed that genomic coadaptation and heterozygosity are the two genetic factors that increase developmental stability (Graham and Felley 1985). Hybrid populations are therefore thought either to bene®t from an increase in heterozygosity or to suer from disruption of coadaptation, depending on the degree of divergence between hybridising taxa (Harrison 1990).…”

Section: Introductionmentioning

confidence: 99%

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Plasticity in filtering screens of Daphnia cucullata × galeata hybrids and parental species at two food concentrations

et al. 1999

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The coexistence of Daphnia cucullata × galeata hybrids with the parental species D. galeata and D. cucullata was investigated by measuring areas and mesh sizes of filtering structures of these herbivorous zooplankton taxa cultivated at low and high food concentrations. The clearance rates and somatic growth rates were also determined. When reared at low food concentration, all taxa had larger filtering areas. Larger filtering areas also resulted in higher clearance rates. Differences between taxa in both filtering area and clearance rate were caused mainly by interspecific size differences. Hybrids had the largest absolute mesh sizes, and the parental species had smaller mesh sizes. Hybrids also showed heterosis in somatic growth rate at high food concentration. The observed taxon-specific differences in mesh size and somatic growth rate contribute to resource partitioning between the taxa and thus to their successful coexistence in lakes.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Plasticity in filtering screens of Daphnia cucullata × galeata hybrids and parental species at two food concentrations

et al. 1999

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“…In this species, the presence of an unmodified resistance allele disrupts developmental stability and elevates FA through the breakdown of genic coadaptation. Evidence for a similar general mechanism elevating FA comes from hybridization studies of stickelbacks (Pungitius), sunfishes (Enneacanthus), fruit flies (Drosophila), and willows (Salix; Tanaka 1982; Graham and Felley 1985;Markow and Ricker 1991;Hochwender and Fritz 1999). But increasing genetic diversity within species may have a very different outcome; in rainbow trout (Oncorhyncus mykiss), cutthroat trout (O. clarki), and house mice (Mus musculus), the most heterozygous individuals express the least FA (Leary et al 1983(Leary et al , 1984Alibert et al 1994).…”

mentioning

confidence: 98%

The Quantitative Genetics of Fluctuating Asymmetry

Polák¹,

Starmer²

2007

Evolution

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Fluctuating asymmetry (subtle departures from identical expression of a trait across an axis of symmetry) in many taxa is under stabilizing selection for reduced asymmetry. However, lack of reliable estimates of genetic parameters for asymmetry variation hampers our ability to predict the evolutionary outcome of this selection. Here we report on a study, based on analysis of variation within and between isofemale lines and of generation means (line-cross analysis), designed to dissect in detail the quantitative genetics of positional fluctuating asymmetry (PFA) in bristle number in natural populations of Drosophila falleni. PFA is defined as the difference between the two sides of the body in the placement or position of components of a meristic trait. Heritability (measured at 25ЊC) of two related measures of PFA were 13% and 21%, both of which differed significantly from zero. In contrast, heritability estimates for fluctuating asymmetry in the total number of anterior (0.7%) and transverse (2.4%) sternopleural bristles were smaller, not significant, and in quantitative agreement with previously published estimates. Heritabilities for bristle number (trait size) were considerably greater than that for any asymmetry measure. The experimental design controlled for the potentially confounding effects of common familial environment, and repeated testing revealed that PFA differences between lines were genetically stable for up to 16 generations in the laboratory at 25ЊC. We performed line cross analysis between strains at the extremes of the PFA distribution (highest and lowest values); parental strains, F 1 , F 1r (reciprocal), F 2 , backcross, and backcross reciprocal generations were represented. The inheritance of PFA was described best by additive and dominance effects localized to the X-chromosomes, whereas autosomal dominance effects were also detected. Epistatic, maternal, and cytoplasmic effects were not detected. The inheritance of trait size was notably more complex and involved significant autosomal additive, dominance, and epistatic effects; maternal dominance effects; and additive and dominance effects localized to the X-chromosomes. The additive genetic correlation between PFA and its associated measure of trait size was negative (Ϫ0.049), but not statistically significant, indicating that the loci contributing additive genetic effects to these traits are probably different. It is suggested that PFA may be a sensitive measure of developmental instability because PFA taps the ability of an organism to integrate interconnected developmental pathways.

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“…Literature is replete with studies concerning FA in hybrids (and comparison with parents) and the results are a mixed bag (Jackson 1937a, b;Felly 1980;Zaharov 1981;Graham and Felly 1985;Leary et al 1985;Ferguson 1986; Lamb and Avise 1987;Ross and Robertson 1990;lamb et al 1990;Markow and Ricker 1991;Graham 1992;Blows and Sokolowaki 1995;Hutchinson and Cheverud 1995;Alibert et al 1997;Andersen et al 2002Andersen et al , 2006Andersen et al , 2008Rego et al 2006;Carreira et al 2008;Vishalakshi and Singh 2009;Demontis et al 2010;Trotta et al 2010;Novicic et al 2011). Alibert and Auffray (2003) said that 71 % published work show an increase in FA in hybrids (of different genera, or species) from parents.…”

Section: Discussionmentioning

confidence: 96%

“…In some of the studies, natural hybrid populations (mostly insects, fish, frogs and lizards) were examined. It has been postulated by Graham and Felly (1985) that the age of the hybrid zone determines whether hybrids will have a greater or lesser FA than the parental populations. If they have existed for a long while, coadapted gene complexes having had time to evolve, would rescue any dire effect on FA.…”

Section: Discussionmentioning

confidence: 99%

Interspecific hybridization does not affect the level of fluctuating asymmetry (FA) in the Drosophila bipectinata species complex

Banerjee

Singh

2015

Genetica

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The Drosophila bipectinata species complex comprises of four very closely related species namely D. bipectinata, D. parabipectinata, D. malerkotliana and D. pseudoananassae. It was found that irrespective of the evolutionary divergence among the species, FA which is reflective of the developmental precision remains nearly same in four species. During the present study, the level of FA in different morphological traits was studied in interspecific hybrids and compared with that of parental species with the view that it would throw light on the degree of divergence between the parental species. If they have not diverged much, the interspecific hybrids may have a similar FA level, incompatibilities between their genomes being negligible. On the other hand, if there is substantial divergence, the level of FA may be higher due to incompatibility between the genomes of the parental species. The morphological traits taken were sternopleural bristle number and wing length in both males and females and ovariole number and sex-comb tooth number in females and males respectively. However, except in a few cases, we could not detect any significant differences in the level of FA in hybrids as compared to pure species. On the other hand, a number of abnormalities like poor viability, dystrophied ovaries, asymmetrical eyes etc., could be detected in hybrids from crosses involving D. pseudoananassae as one of the parents. Therefore, we conclude that specific developmental pathways are more susceptible to developmental disturbances due to genomic incompatibilities than the large complex system bringing about developmental stability.

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GENOMIC COADAPTATION AND DEVELOPMENTAL STABILITY WITHIN INTROGRESSED POPULATIONS OFENNEACANTHUS GLORIOSUSANDE. OBESUS(PISCES, CENTRARCHIDAE)

Cited by 77 publications

References 37 publications

Plasticity in filtering screens of Daphnia cucullata × galeata hybrids and parental species at two food concentrations

Plasticity in filtering screens of Daphnia cucullata × galeata hybrids and parental species at two food concentrations

The Quantitative Genetics of Fluctuating Asymmetry

Interspecific hybridization does not affect the level of fluctuating asymmetry (FA) in the Drosophila bipectinata species complex

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