Y-Chromosome morphology and incidence of the 129 translocation in argentine creole bulls

Luca, J.C. De; Golijow, Carlos Daniel; Giovambatistta, G.; Diessler, Mónica Elizabeth; Dulout, Fernando Noel

doi:10.1016/s0093-691x(97)00032-0

Cited by 7 publications

(8 citation statements)

References 7 publications

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“…These results coincide with those of Madriz and Muñoz [6] , Muñoz et al [8,9] for the Venezuelan Creole, Postiglioni et al [11] for the Uruguayan Creole and Igartúa et al [5] for the Argentine Aberdeen Angus × Creole who all found the 1/29 Robertsonian translocation. Our results did not coincide with those of Deluca et al [1] and Género et al [3] who did not find structural or numerical anomalies in their cytogenetic studies of the Patagonian biotype of the Argentinean Creole. They sustain that the high rate of fertility makes this breed free of this chromosomal anomaly.…”

Section: Resultscontrasting

confidence: 99%

“…This cytogenetic characterisation is typical of Bos taurus but there are few cytogenetic studies on the Argentinean Creole. The first cytogenetic analysis in Argentine was carried out by Igartúa et al [5] on 34 beef cattle females, Deluca et al [1] on 36 bulls and Género et al [3] performed a systematic chromosomal analysis of the biotype from Patagonia on 25 animals. All reports conclude that these animals have a chromosomal number of 2n = 60, with no 1/29 Robertsonian translocation.…”

Section: Introductionmentioning

confidence: 99%

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Presumptive 1/29 Robertsonian translocation observed in the Argentinean Creole cattle breed

et al. 2003

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-A cytogenetic investigation was carried out on 39 Argentinean Creole cattle (8 bulls and 31 cows) from the Experimental Station in Chamical (La Rioja, Argentine). Heparinised blood samples were cultured using a method of Moorhead et al. with some modifications. Karyotypes were established using a chromosomal digital analyser. A presumptive 1/29 Robertsonian translocation was found in one bull which had 2n = 59 chromosomes. The remaining animals appeared chromosomally normal. The 1/29 translocation has been diagnosed in other Creole breeds in America but never in Argentine. The Y chromosome of the sampled bulls had the typical sub-metacentric structure normally occurring in Bos taurus. It is suggested that programmes for genetic and reproductive improvement incorporate chromosomal analysis of bulls and cows with a high genetic value for natural and artificial breeding. Individuals with chromosomal abnormalities could then be eliminated, helping to assure the high fertility rates of this breed.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Presumptive 1/29 Robertsonian translocation observed in the Argentinean Creole cattle breed

et al. 2003

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“…This Y morphology has never been found in cattle from Spain (e.g. Arruga and Zaragoza, 1985;Moreno-Millán et al, 1991) or Argentina (De Luca et al, 1997;Giovambattista et al, 2000), although it has been found in taurine cattle of Bolivia, probably due to a recent introgression of zebu from Brazil. Analysis of a polymorphic Y microsatellite also showed no zebuinespecific allele in the Argentinean cattle, with Bolivian populations showing between 17 and 41% of zebu introgression .…”

Section: Discussionmentioning

confidence: 87%

African and European mitochondrial haplotypes in South American Creole cattle

et al. 2003

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South American Creole cattle are direct descendants of the animals brought to the New World by the Spanish and Portuguese during the 16th century. A portion of the mitochondrial D-loop was sequenced in 36 animals from five Creole cattle populations in Argentina and four in Bolivia. Individuals belonging to the potentially ancestral Spanish breed Retinta were also analysed. Sequence comparisons revealed three main groups: two with the characteristics of European breeds and a third showing the transitions representative of the African taurine breeds. The African sequences were found in two populations from Argentina and three populations from Bolivia, whose only connections go back to colonial times. The most probable explanation for the finding is that animals could have been moved from Africa to Spain during the long-lasting Arabian occupation that started in the seventh century, and from the Iberian Peninsula to America eight centuries later. However, since African haplotypes were not found in the Spanish sample, the possibility of cattle transported directly from Africa cannot be disregarded.

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“…Unselected Bos taurus Creole cattle are difficult to find at the present time since most of the Creole breeds frequently have been crossbred with Bos indicus. However, the introgression of Bos indicus in Argentine Creole cattle (AC) seems to be irrelevant since cytogenetic studies showed the absence of the typical acrocentric Bos indicus Y chromosome (De Luca et al, 1997). Therefore, AC can be defined as pure descendants of animals brought over by Spanish conquerors.…”

Section: Creole Cattle As a Model Of An Unselected Breedmentioning

confidence: 99%

Genetic variability and population structure in loci related to milk production traits in native Argentine Creole and commercial Argentine Holstein cattle

et al. 1999

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Many cattle breeds have been subjected to high selection pressure for production traits. Consequently, population genetic structure and allelic distribution could differ in breeds under high selection pressure compared to unselected breeds. Analysis of k-casein, aS1-casein and prolactin gene frequencies was made for Argentine Creole (AC) and Argentine Holstein (AH) cattle herds. The calculated FST values measured the degree of genetic differentiation of subpopulations, depending on the variances of gene frequencies.The AC breed had considerably more variation among herds at the aS1-casein and k-casein loci. Conservation strategies should consider the entire AC population in order to maintain the genetic variability found in this native breed.

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Y-Chromosome morphology and incidence of the 129 translocation in argentine creole bulls

Cited by 7 publications

References 7 publications

Presumptive 1/29 Robertsonian translocation observed in the Argentinean Creole cattle breed

Presumptive 1/29 Robertsonian translocation observed in the Argentinean Creole cattle breed

African and European mitochondrial haplotypes in South American Creole cattle

Genetic variability and population structure in loci related to milk production traits in native Argentine Creole and commercial Argentine Holstein cattle

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