Abstract
A total of 116 goats originating from three heterozygous bucks for rob ( 5 15 ) were cytogenetically studied at Botucatu, Brazil. In the mating 59,XY,t( 5 15 ) × 60,XX, the offspring karyotype proportion did not differ significantly from the expected ratio of 1 normal:1 heteroxygous. In the mating 59,XY,t( 5 15 ) × 59,XX,t( 5 15 ) the observed proportion was 1 normal:2 heterozygous: 1 homozygous, and in the mating 59,XY,t( 5 15 ) × 58,XX,tt( 5 15 ) the observed proportion was 1 heterozygous:1 homozygous. No animals had unbalanced karyotypes and no differences in the weight at birth of normal, heterozygous and homozygous kids were observed ( P>0.10).
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