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001-es BibID:	BIBFORM049418
Első szerző:	Cotton, A. J.
Cím:	Male eyespan size is associated with meiotic drive in wild stalk-eyed flies (Teleopsis dalmanni) / A. J. Cotton, M Földvári, S. Cotton, A. Pomiankowski
Dátum:	2014
ISSN:	0018-067X
Megjegyzések:	This study provides the first direct evidence from wild populations of stalk-eyed flies to support the hypothesis that male eyespan is a signal of meiotic drive. Several stalk-eyed fly species are known to exhibit X-linked meiotic drive. A recent quantitative trait locus analysis in Teleopsis dalmanni found a potential link between variation in male eyespan, a sexually selected ornamental trait, and the presence of meiotic drive. This was based on laboratory populations subject to artificial selection for male eyespan. In this study, we examined the association between microsatellite markers and levels of sex ratio bias (meiotic drive) in 12 wild T. dalmanni populetions. We collected two data sets: (a) brood sex ratios of wild-cought males mated to standard laboratory females and (b) variation in a range of phenotypic traits associated with reproductive success of wild-caught males and females. In each case, we typed individuals for eight-X-linked microsatellite markers, including several that previously were shown to be associated with male eyespan and meiotic drive. We found that one microsatellite marker was very strongly associated with meiotic drive, whereas a second showed a weaker association. We also found that, using both independent data sets, meiotic drive was strongly associated with male eyespan, with smaller eyespan males being associated with more female-biased broods. These results suggest that mate preference for exaggerated male eyespan allows females to avoid mating with males carrying the meiotic drive gene and is thus a potential mechanism for the maintenance and evolution of female mate preference.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban meiotic drive sex ratio sexual selection stalk-eyed fly
Megjelenés:	Heredity. - 112 (2014), p. 363-369. -
További szerzők:	Földvári Mihály (1974-) (ökológus) Cotton, Samuel Pomiankowski, Andrew
Pályázati támogatás:	MTA-DE Lendület MTA Viselkedésökológiai Kutatócsoport
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM023629
Első szerző:	Pecsenye Katalin (biológus)
Cím:	Heritabilites and additive genetic variances of the activites of some enzymes in Drosophila melanogaster poulations living in different habitats / K. Pecsenye, I. Komlósi, A. Saura
Dátum:	2004
ISSN:	0018-067X
Megjegyzések:	Drosophila melanogaster samples were collected from a large population in two habitats: farmyards and distilleries. Samples were taken from two willages in each habitat. Three isofemale lines were established from all four samples and full-sib crosses were set each isofemale line. Activities of four enzymes (ADH,alfaGPDH, IDH and 6 PGDH) were measured in the offspring of each cross on starch gel after electrophoresis. Broad sence heritabilities and additive genetic variances were estimated in all four samples. Most of the activity variation was observed within the isofemale lines.The isofemale lines tended to be more different in the distilleries than in the farmyards. There was no significant difference in the average activities between the two habitats for any of the enzymes investigated. The additive genetic variance of the enzyme activities did not exhibit a consistent habitat pattern. In the farmyard habitat, we detected a higher activity variation in Tiszafüred than in the other village. Strong correlation was observed among the activities of the enzymes intestigated. Correlation coefficients indicated higher level of correlation in the samples collected in Tiszafüred than in those originating from Tiszaszőlős. The heritability values were rather high and they had a considerable variation both between the habitats and across the enzymes.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Additive genetic variance, enzyme activity variation, heritability; Drosophila melanogaster
Megjelenés:	Heredity. - 93 : 2 (2004), p. 215-221. -
További szerzők:	Komlósi István (1960-) (agrármérnök) Saura, Anssi
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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