Fertility and Fitness of XO Males in Drosophila I. Qualitative Study

Voelker, Robert A.; Kojima, K.

doi:10.2307/2406505

Cited by 25 publications

(19 citation statements)

References 14 publications

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“…INTRODUCTION That spermatozoan length in Drosophila varies with the number of Y chromosomes was reported by Hess and Meyer (1968) for D. hydei and D. melanogaster, in both of which XYY males have sperms much longer than XY males and, in the latter of which, XO males have sperms much shorter than XY males. In both these species, as in most others investigated, a Y chromosome is essential for male fertility (Voelker and Kojima, 1971). However, in D. affinis (Miller and Stone, 1962) and D. narragansett (Voelker and Kojima, 1971), although males ordinarily have a Y chromosome, XO males are fertile and the XO condition may be transmitted indefinitely to male descendants.…”

Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 71%

“…In both these species, as in most others investigated, a Y chromosome is essential for male fertility (Voelker and Kojima, 1971). However, in D. affinis (Miller and Stone, 1962) and D. narragansett (Voelker and Kojima, 1971), although males ordinarily have a Y chromosome, XO males are fertile and the XO condition may be transmitted indefinitely to male descendants. On the other hand, Voelker and Kojima (1971) showed that the XO condition in affinis is associated with some selective disadvantage in cage populations.…”

Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 71%

“…It is, however, interesting and possibly significant that the shortest "long sperms" were found in affinis and narragansett, species in which the absence of a Y chromosome is not known to prevent male fertility. Although not all affinis subgroup species have been studied for the importance of the Y in male fertility, in some of these species, namely D. algonquin, "eastern" athabasca (both "A" and "B"), and tolteca, XO males are evidently sterile (Voelker and Kojima, 1971). …”

Section: Resultsmentioning

confidence: 99%

“…However, in D. affinis (Miller and Stone, 1962) and D. narragansett (Voelker and Kojima, 1971), although males ordinarily have a Y chromosome, XO males are fertile and the XO condition may be transmitted indefinitely to male descendants. On the other hand, Voelker and Kojima (1971) showed that the XO condition in affinis is associated with some selective disadvantage in cage populations. It was our purpose to investigate sperm length in D. affinis and narragansett strains with and without a Y chromosome.…”

Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 99%

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Spermatozoan Length in Species of the Drosophila affinis Subgroup

Sanger¹,

Miller²

1973

American Midland Naturalist

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Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 71%

Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Spermatozoan Length In Species Of the Drosophila Affinis Submentioning

confidence: 99%

See 2 more Smart Citations

Spermatozoan Length in Species of the Drosophila affinis Subgroup

Sanger¹,

Miller²

1973

American Midland Naturalist

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“…In fact. Sterile XO karyotypes have been observed among the rare male offspring from sex-ratio fathers in D. simuians, D. pseudoobscura and D. athabasca, and these must have resulted from eggs fertilized by nullo-XY sperm that escaped failure (Voelker & Kojima, 1971;Henahan & Cobbs, 1983;Cazemajor, Joly & Montchamp-Moreau, 2000). This implies a multigenic determinism of sex-ratio, which is consistent with the theoretical prediction that any new allele that improves the transmission ratio of the X chromosome will be selected for.…”

Section: Introductionmentioning

confidence: 99%

The sex-ratio trait and its evolution in Drosophila simulans: a comparative approach

Jutier

Derôme

Montchamp‐Moreau

2004

Drosophila Melanogaster, Drosophila Simulans: So Similar, So Different

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Sex-ratio X chromosomes, which prevent the production of Y-bearing sperm, have been identified in a dozen Drosophila species covering a wide phylogenetic range. It has not yet been established whether the same ancestral genetic system underlies this type of meiotic drive across the genus, but the biological characteristics and the evolutionary history of species undoubtedly determine the fate of X-linked drivers. The intragenomic conflict they trigger contributes to geographical variation in D. simulans, which shows a sharp contrast between ancestralstock derived and recently introduced populations. In the former, sex-ratio X chromosomes are widespread and sometimes reach a high frequency, but they are inactivated by strong Y-linked and autosomal drive suppressors. In recently-introduced populations, sex-ratio X chromosomes are generally rare and suppressors are moderate or absent. We discuss how this pattern could be related to the recent geographical expansion of D. simulans, and consider possible reasons why sex-ratio drive apparently does not occur in D. melanogaster.

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Evidence for feminized genetic males in a flea beetle using newly identified X‐linked markers

Rohlfing,

Grewoldt,

Cordellier

et al. 2024

Ecology and Evolution

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The equilibrium of sex ratios in sexually reproducing species is often disrupted by various environmental and genetic factors, including endosymbionts like Wolbachia. In this study, we explore the highly female‐biased sex ratio observed in the flea beetle, Altica lythri, and its underlying mechanisms. Ancient hybridization events between Altica species have led to mitochondrial DNA introgression, resulting in distinct mitochondrial haplotypes that go along with different Wolbachia infections (HT1‐wLytA1, HT1*‐ uninfected, HT2‐wLytA2, and HT3‐wLytB). Notably, beetles with some haplotypes exclusively produce female offspring, suggesting potential Wolbachia‐induced phenomena such as feminization of genetic males. However, the observed female bias could also be a consequence of the ancient hybridization resulting in nuclear–cytoplasmic conflicts between introgressed mtDNA and nuclear genes. Through transcriptomic analysis and the program SEX‐DETector, we established markers for genotypic sex differentiation for A. lythri, enabling genetic sexing via qPCR. Our findings suggest that feminization of genetic males is contributing to the skewed sex ratios, highlighting the intricate dynamics of sex determination and reproductive strategies in this flea beetle. This study provides valuable insights into the dynamics of genetic conflicts, endosymbionts, and sex ratios, revealing the novel phenomenon of genetic male feminization in the flea beetle A. lythri.

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Fertility and Fitness of XO Males in Drosophila I. Qualitative Study

Cited by 25 publications

References 14 publications

Spermatozoan Length in Species of the Drosophila affinis Subgroup

Spermatozoan Length in Species of the Drosophila affinis Subgroup

The sex-ratio trait and its evolution in Drosophila simulans: a comparative approach

Evidence for feminized genetic males in a flea beetle using newly identified X‐linked markers

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