The Barriers to Interspecific Hybridization in Domestic and Laboratory Mammals. I. Gametic Isolation and Hybrid Inviability

McGovern, P.T.

doi:10.1016/s0007-1935(17)35141-2

Cited by 11 publications

(14 citation statements)

References 66 publications

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“…Hybrid sterility is considered one of the basic mechanisms of reproductive isolation (Dobzhansky 1973;McGovem 1975;Capanna 1976;King 1993). Sterility might result from meiotic defects, including defects of chromosome synapsis.…”

Section: Discussionmentioning

confidence: 99%

Sporadic disorders in the meiotic prophase I inCricetulus barabensishybrids (Cricetidae, Rodentia) do not lead to reproductive isolation between karyomorphs

et al. 2014

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Electron microscopy analysis of the synaptonemal complex was carried out for the first time in Cricetulus barabensis pseudogriseus, fertile F 1 hybrids of C. b. pseudogriseus × C. b. griseus, C. b. griseus × C. b. barabensis, and back-cross hybrids C. b. pseudogriseus × (F 1 C. b. pseudogriseus × C. b. griseus). Meiotic disturbances were identified in the nuclei of single hybrid spermatocytes, including atypical synapsis, associations of autosomes with a sex bivalent, and sex body formation errors. Our study confirms the results of the molecular genetic and craniometric analysis of these forms. Despite the geographical segregation, three chromosomal forms of Cricetulus barabensis complex do not establish reliable cytogenetic barriers.

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Section: Discussionmentioning

confidence: 99%

Sporadic disorders in the meiotic prophase I inCricetulus barabensishybrids (Cricetidae, Rodentia) do not lead to reproductive isolation between karyomorphs

et al. 2014

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“…Most of these hybrids are listed in Annie Gray's masterful bibliography [8] and they represent exciting and new scientific challenges for today's molecular and developmental biologists. In the past, numerous successful attempts at breeding have been made but the hybrids are sterile in all cases [9] with the occasional exception of mules [10] (horse-donkey). Up to now, most of these hybrids have been studied using conventional cytogenetics, with no banding results and no information about chromosomal rearrangements.…”

Section: Introductionmentioning

confidence: 99%

“…First, by hybrid sterility that arises from the heterozygous rearrangements [9] that disrupt meiotic pairing, or from the production of chromosomally unbalanced gametes [11–12]. Second, by the suppression of recombination in rearranged chromosomal regions that consolidate existing barriers and promote adaptive divergence and speciation in the face of gene flow [13].…”

Section: Introductionmentioning

confidence: 99%

“…Historically, chromosomal rearrangements have been considered a major source of hybrid sterility, particularly in plants [11], but this view has fallen from favour as a mechanism of postzygotic reproductive isolation. In sterile hybrids the main problems are difficulty in synapsis during meiosis that may lead to non-homologous recombination and maturation arrest during gametogenesis [9]. …”

Section: Introductionmentioning

confidence: 99%

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Pooling strategy and chromosome painting characterize a living zebroid for the first time

Iannuzzi

Pereira²,

Iannuzzi

et al. 2017

PLoS ONE

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We have investigated the complex karyotype of a living zebra-donkey hybrid for the first time using chromosome-specific painting probes produced from flow-sorted chromosomes from a zebra (Equus burchelli) and horse (Equus caballus). As the chromosomes proved difficult to distinguish from one another, a successful new strategy was devised to resolve the difficulty and characterize each chromosome. This was based on selecting five panels of whole chromosome painting probes that could differentiate zebra and donkey chromosomes by labelling the probes with either FITC or Cy3 fluorochromes. Each panel was hybridized sequentially to the same G-Q-banded metaphases and the results combined so that every zebra and donkey chromosome in each suitable metaphase could be identified. A diploid number of 2n = 53, XY was found, containing haploid sets of 22 chromosomes from the zebra and 31 chromosomes from the donkey, without evidence of chromosome rearrangement. This new strategy, developed for the first time, may have several applications in the resolution of other complex hybrid karyotypes and chromosomal aberrations.

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“…In terms of reproductive biology goats and sheep are closely related, having similar oestrous cycle and gestation lengths and indistinguishable placentation. Interspecific crosses have produced viable progeny although such pregnancies frequently fail during week 4 or 5 (Hancock, McGovern & Stamp, 1968;McGovern, 1975, Bunch et al 1976). …”

Section: Introductionmentioning

confidence: 99%

Sources of progesterone during gestation in Barbary sheep (Ammotragus lervia)

Flint¹,

Burton²,

Heap³

1983

Journal of Endocrinology

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Concentrations of progesterone in arterial and ovarian, uterine and jugular venous plasma were determined in four Barbary sheep at various stages of pregnancy. The results, together with ovarian histology, show that the corpus luteum regresses before term in Barbary sheep, as in most breeds of domestic ewes. Uterine synthesis of progesterone was demonstrated in late pregnancy in two animals in which uterine venous levels of progesterone were increased two- to fourfold above arterial concentrations. The placenta contained 3 beta-hydroxysteroid dehydrogenase. Barbary sheep (diploid chromosome number, 2N = 58) therefore resemble the domestic sheep (2N = 54) rather than the goat (2N = 60) from the point of view of the source of the progesterone required for maintenance of pregnancy.

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The Barriers to Interspecific Hybridization in Domestic and Laboratory Mammals. I. Gametic Isolation and Hybrid Inviability

Cited by 11 publications

References 66 publications

Sporadic disorders in the meiotic prophase I inCricetulus barabensishybrids (Cricetidae, Rodentia) do not lead to reproductive isolation between karyomorphs

Sporadic disorders in the meiotic prophase I inCricetulus barabensishybrids (Cricetidae, Rodentia) do not lead to reproductive isolation between karyomorphs

Pooling strategy and chromosome painting characterize a living zebroid for the first time

Sources of progesterone during gestation in Barbary sheep (Ammotragus lervia)

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