Heterosis on Body Weights in Crosses Among Brahman, Santa Gertrudis and Cheju Native Cattle
نویسندگان
چکیده
SUHHARY Data obtained from 428 calves (59 Cheju native cattle 60 Br hm. ' a an Gertrudis and 269 crossbreds) were analyzed to es t~mate main eff ' d h. f ects of mental factors an eterosis. Nat~ng type, sex 0 .calf, and year of significant sources of variation on most of the we~gh ts at preweani weaning periods. Brah;-.c.,' x Chej u native cat tIe c ro ss showed hetero:~ .... on birth weight. Haternal heterosis on weaning weight was 4.9% in 8 0 crosses and 12.3% in Santa Gertrudis backcrosses. INTRODUCTION Systematic crossbreeding provides for use of heterosis and of among breeds to optimize average genetic merit of traits for adap_Q,uL.L1.,:W various c l imat ic and nutritive environmen t s encountered in beef p The fact could be responsible for con tinued improvement when grading is practic~ introduction of desirable additive genes wi t h plus effects into a herd
منابع مشابه
Breed and Heterosis Effect in Crosses among the Angus, Brahman, and Charolais Cattle Breeds
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