Das Verhalten der Chromosomen bei der Spermatogenese der SchmetterlingePygaera anachoreta, curtula undpigra sowie einiger ihrer Bastarde

Federley, Harry

doi:10.1007/bf01876667

Cited by 45 publications

(17 citation statements)

References 23 publications

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“…The chromosome numbers of lepidopterans resist change. The first demonstration that karyotype differences in animals give rise to hybrid sterility was performed with lepidopterans (Federley, 1913). Butterflies have been crossed extensively (Lorković, 1990; Ae, 1995) and there is little doubt, notwithstanding the nearly holokinetic chromosomes, that hybrids between differing karyotypes have reduced fitness.…”

Section: Discussionmentioning

confidence: 99%

Chromosomal evolution of South American frugivorous butterflies in the Satyroid clade (Nymphalidae: Charaxinae, Morphinae and Satyrinae)

Brown¹,

Freitas²,

Schoultz³

et al. 2007

Biological Journal of the Linnean Society

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We describe the chromosome numbers of a monophyletic group of Satyroid subfamilies of primary fruit-attracted butterflies from South America: Charaxinae, Morphinae (including Brassolini) and Satyrinae. The charaxines do not have a distinct modal number. Their chromosome numbers are in the range n = 6-50, with n = 7-9, n = 12, n = 16, n = 19-21, n = 26, and n = 28-31 being the most common numbers. Within the Morphinae, the Morphini have a modal n = 28 and the Brassolini a modal n = 29, with few exceptions. The Neotropical satyrines, in particular the basal species, have a weak modal n = 29, which is a strong modal number in Palearctic satyrines. The African satyrines have an equally strong modal n = 28. Most Neotropical satyrines have, like charaxines, chromosome numbers lower than the weak modal n = 29, and often half this modal, but there are genera with stable numbers among the satyrines and charaxines. Evidently, the Neotropical satyroids descend from basal Nymphalidae with the typical lepidopteran modal number of n = 31, which have also given rise to the Heliconiini with modal n = 31 and 21 and Ithomiinae with modal numbers of n = 14-15.

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Section: Discussionmentioning

confidence: 99%

Chromosomal evolution of South American frugivorous butterflies in the Satyroid clade (Nymphalidae: Charaxinae, Morphinae and Satyrinae)

Brown¹,

Freitas²,

Schoultz³

et al. 2007

Biological Journal of the Linnean Society

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“…). Chromosomal rearrangements can drive reproductive isolation owing to problems associated with meiotic segregation of heterozygous rearrangements, causing sterility or inviability (Federley ; McKee et al. ; Torgasheva and Borodin ).…”

mentioning

confidence: 99%

Ancestral and neo‐sex chromosomes contribute to population divergence in a dioecious plant

2019

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Empirical evidence from several animal groups suggests sex chromosomes disproportionately contribute to reproductive isolation. This effect may be enhanced when sex chromosomes are associated with turnover of sex determination systems resulting from structural rearrangements to the chromosomes. We investigated these predictions in the dioecious plant Rumex hastatulus, which is composed of populations of two different sex chromosome cytotypes caused by an X‐autosome fusion. Using population genomic analyses, we investigated the demographic history of R. hastatulus and explored the contributions of ancestral and neo‐sex chromosomes to population genetic divergence. Our study revealed that the cytotypes represent genetically divergent populations with evidence for historical but not contemporary gene flow between them. In agreement with classical predictions, we found that the ancestral X chromosome was disproportionately divergent compared with the rest of the genome. Excess differentiation was also observed on the Y chromosome, even when we used measures of differentiation that control for differences in effective population size. Our estimates of the timing of the origin of neo‐sex chromosomes in R. hastatulus are coincident with cessation of gene flow, suggesting that the chromosomal fusion event that gave rise to the origin of the XYY cytotype may have also contributed to reproductive isolation.

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“…They have also secured their role as model systems in the study of ecology and evolution ( Hanski 2003; Watt and Boggs 2003). Lepidopterans have been used as models in both population genetics ( Fisher 1930) and cytogenetics ( Federley 1913).…”

mentioning

confidence: 99%

Chromosome evolution in Neotropical butterflies

2013

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We list the chromosome numbers for 65 species of Neotropical Hesperiidae and 104 species or subspecies of Pieridae. In Hesperiidae the tribe Pyrrhopygini have a modal n = 28, Eudaminae and Pyrgini a modal n = 31, while Hesperiinae have n = around 29. Among Pieridae, Coliadinae have a strong modal n = 31 and among Pierinae Anthocharidini are almost fixed for n = 15 while Pierini vary with n = 26 as the most common chromosome number. Dismorphiinae show wide variation. We discuss these results in the context of chromosome numbers of over 1400 Neotropical butterfly species and subspecies derived from about 3000 populations published here and in earlier papers of a series. The overall results show that many Neotropical groups are characterized by karyotype instability with several derived modal numbers or none at all, while almost all taxa of Lepidoptera studied from the other parts of the world have one of n = 29-31 as modal numbers. Possibly chromosome number changes become fixed in the course of speciation driven by biotic interactions. Population subdivision and structuring facilitate karyotype change. Factors that stabilize chromosome numbers include hybridization among species sharing the same number, migration, sexual selection and possibly the distribution of chromosomes within the nucleus.

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Das Verhalten der Chromosomen bei der Spermatogenese der SchmetterlingePygaera anachoreta, curtula undpigra sowie einiger ihrer Bastarde

Cited by 45 publications

References 23 publications

Chromosomal evolution of South American frugivorous butterflies in the Satyroid clade (Nymphalidae: Charaxinae, Morphinae and Satyrinae)

Chromosomal evolution of South American frugivorous butterflies in the Satyroid clade (Nymphalidae: Charaxinae, Morphinae and Satyrinae)

Ancestral and neo‐sex chromosomes contribute to population divergence in a dioecious plant

Chromosome evolution in Neotropical butterflies

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