For association between BMP-15 (exon2) gene polymorphisms and litter size trait in Anglo-Nubian goat, PCR-SSCP technique was developed. Twenty-five female Anglo-Nubian goats reared under Egyptian conditions were selected according to their litter size. DNA from blood samples of these animals was extracted to amplify 140-bp of the BMP-15 gene affecting litter size production trait in goats. Based on the breeding value, 25 animals were selected from the highest to the lowest litter size productivity. PCR amplification size of the BMP-15 gene (140-bp) was genotyped in all animals. PCR-SSCP analysis of the BMP-15 gene (140-bp) showed three various genotypes BB, BM and MM with frequencies 0.46, 0.43 and 0.11, respectively. The frequencies of the B and M alleles were 0.68 and 0.32, respectively. The results indicated that the BB genotype was higher in litter size productivity than the other genotypes with significant differences. The result of this study confirmed that BMP-15 gene may be a strong candidate gene for further applications in marker-assisted selection (MAS) for litter size in goats.

For the association between of Follicle stimulating hormone receptor (FSHR) gene (partial part of exon 10) polymorphisms and litter size trait in Egyptian Ossimi sheep, polymerase chain reaction-single stranded conformational polymorphism (PCR-SSCP) and DNA sequencing techniques were developed. Fifty female Ossimi sheep reared under Egyptian conditions were selected according to their litter size. DNA from blood samples of these animals was isolated to amplify 250-bp of the FSHR gene influencing litter size production trait in sheep. Based on litter size, 50 animals were selected from the highest to the lowest litter size productivity during three seasons. PCR-SSCP analysis of the FSHR gene (250-bp) showed two various genotypes AA and AB with frequencies 0.64 and 0.36, respectively. The frequencies of the A and B alleles were 0.82 and 0.18, respectively. PCR fragment of FSHR gene (191-bp) was sequenced only in the high and low litter size productivity animals (GenBank accession numbers from MG973191 to MG973207, sequentially). The result indicated that 6SNPs

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