Frequency and distribution of rob(1;29) in eight Portuguese cattle breeds.
Cytogenetic investigations performed in eight Portuguese cattle breeds revealed the presence of rob(1;29) in both heterozygous and homozygous conditions in all, and five breeds, respectively, with variable percentages of carriers as follows: 41.0% in Arouquesa, 69.9% in Barrosa, 39.4% in Maronesa, 2.8% in Mirandesa, 8.5% in Marinhoa, 1.8% in Mertolenga, 21.3% in Raca Brava and 21.5% in Alentejana. CBA- and RBA-banding were performed to ascertain the chromosomes involved in the chromosome abnormality. A total of 1,626 animals were investigated. Reproductive parameters (number of calves per 100 cows) were higher in Mirandesa (80%) when compared with both Maronesa (75%) and Barrosa (70%) breeds, underlining that rob(1;29) reduces fertility in the carriers.
Iannuzzi
A
A
Physiopathology and Reproduction of Domestic Animals, Department of Animal Production and Food Inspection, Faculty of Veterinary Medicine, University Federico II, Naples, Italy.
Di Meo
G P
GP
Caputi Jambrenghi
A
A
Vonghia
G
G
Iannuzzi
L
L
Rangel-Figueiredo
T
T
D000818:Animals; D001947:Breeding; D002417:Cattle / Q000235:genetics*; D002871:Chromosome Banding / Q000662:veterinary; D005260:Female; D005828:Genetics, Population; D006579:Heterozygote; D006720:Homozygote; D008297:Male; D011174:Portugal; D013045:Species Specificity; D014178:Translocation, Genetic