Title: Candidate genes for growth traits in beef cattle crosses Bos taurus x Bos indicus

Author(s):  Tambasco DD, Paz CCP, Tambasco-Studart M, Pereira AP, Alencar MM, Freitas AR, Coutinho LL , Packer IU, Regitano LCA

Source:  JOURNAL OF ANIMAL BREEDING AND GENETICS 120 (1): 51-56 FEB 2003

Document Type:  Article

Language:  English

Abstract:  Candidate gene strategy has been proposed to direct the search for quantitative trait loci, and polymorphisms at these loci have been associated with several production traits in bovine. A total of 211 animals resulting from crosses between Nelore females with sires from either Aberdeen Angus, Canchim and Simmental breeds were analyzed for restriction fragment length polymorphisms (RFLPs) in the kappa -casein, beta -lactoglobulin (LGB) and growth hormone GH genes. Average daily gain from birth to weaning (GBW) and from weaning to yearling (GWY) were analyzed by a statistical model comprising RFLP genotypes and their interaction effects. Significant effects (p < 0.05) of growth hormone (GH ) and of the interaction beta -lactoglobulin x GH were verified for the GWY. Animals with LL genotypes for GH had higher GBW than LV animals but lower GWY (p < 0.05).

KeyWords Plus:  CARCASS COMPOSITION; HORMONE GENOTYPES; POLYMORPHISMS; ASSOCIATIONS; BULLS

Addresses:  Regitano LCA (reprint author), EMBRAPA, SE Cattle Res Ctr, Box 339, Sao Carlos, SP BR-13560970 Brazil
EMBRAPA, SE Cattle Res Ctr, Sao Carlos, SP BR-13560970 Brazil
Anim Sci Inst Sao Paulo, Nova Odessa, SP BR-13400000 Brazil
Univ Fed Sao Carlos, Sao Carlos, SP BR-13565905 Brazil
USP, ESALQ, Dept Anim Sci, Piracicaba, SP BR-13418900 Brazil

Publisher:  BLACKWELL VERLAG GMBH, KURFURSTENDAMM 57, D-10707 BERLIN, GERMANY

Subject Category:  AGRICULTURE, DAIRY & ANIMAL SCIENCE

IDS Number:  645HH

ISSN:  0931-2668