Cytogenetics of five generations of hybrids between wild and domestic pigs differing in karyotype morphology

Troshina, Anna I.; Tikhonov, V. N.

doi:10.1007/bf00121841

Cited by 2 publications

(1 citation statement)

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“…The restoration of stable chromosome complement takes up to five generations after crosses between domestic pig and the wild boar (Troshina & Tikhonov, 1980), and up to three generations after crosses between domestic sheep and wild rams (Sharipov et al, 1980) and between some frog species of Rana (Nishioka & Okumoto, 1983). After crosses between two drosophilid subspecies, Drosophila nasuta nasuta and D.n.…”

Section: Resultsmentioning

confidence: 99%

Karyotype variability in successive generations after hybridization between the great sturgeon, Huso huso (L.), and the sterlet, Acipenser ruthenus L.

Arefjev

1989

Journal of Fish Biology

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Karyotype variability in successive generations after hybridization between the great sturgeon, Huso huso (L.), and the sterlet, Acipenser ruthenus L.The karyotypes ofbester (the hybrid between great sturgeon and sterlet) in threegenerationsdo not differ in diploid chromosome number from parental species and are displaced towards the sterlet in numbers of bi-and uni-armed chromosomes and chromosome arms. The variability of quantitative karyotypic parameters other than number of bi-armed chromosomes increases considerably (double, 0naverage)in F, and F2anddeclines to thelevelcharacteristicoftheparentalspeciesinF,.The variability results mainly from aneuploidy in microchromosomes and the karyotypic variabilities of 3 to 6-week-old and 4 to 5-month-old fish are the same. The stabilization of the hybrid karyotype in the third generation is rather rapid and may reflect the formation of a breed. The degree of individual karyotypic variability estimated on the basis of the coefficient of variation is 2-3% for parameters other than the number ofmicrochromosomes, for which it is 6 7 % .

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Section: Resultsmentioning

confidence: 99%