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Title: PASTURE PERFORMANCE, FEEDLOT GAIN, AND CARCASS TRAITS OF ROMOSINUANO CROSSBRED, F-1 (HERFORD X BRAHMAN STEERS

Author
item ROUQUETTE, JR., F. - TEXAS A&M UNIVERSITY
item RANDEL, R. - TEXAS A&M UNIVERSITY
item LONG, C. - TEXAS A&M UNIVERSITY
item Chase, Chadwick - Chad
item PASCHAL, J. - TEXAS A&M UNIVERSITY
item MILLER, R. - TEXAS A&M UNIVERSITY

Submitted to: Journal of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: 9/18/2003
Publication Date: 10/1/2003
Citation: Rouquette, Jr., F.M., Randel, R.D., Long, C.R., Chase, C.C., Paschal, J.C., Miller, R.K. 2003. Pasture performance, feedlot gain, and carcass traits of romosinuano crossbred, f-1 (herford x brahman steers. Journal of Animal Science Vol.81 (Suppl.1):p.227-228

Interpretive Summary:

Technical Abstract: Romosinuano (ROMO) are tropically-adapted, non Bos indicus Cattle which are native to Colombia, and were imported into the US in the mid-1990s by USDA at Brooksville, FL (STARS). Three ROMO sires developed from STARS were bred to F-1 Angus x Brahman, (A x B) dams. The fall-born, half-ROMO (ROMX) steers (n=43) were grazed on ryegrass and clover preweaning. Steers had average birth weight of 35 kg, birth-to-weaning ADG of 1.0 kg/d, and weaning weight of 290 kg at 258 days of age. During the postweaning stocker phase, ROMX grazed bermudagrass (BG) with F-1 Hereford x Brahman (HXB) steers (n=11) from July through September. During the 84-d BG phase, ROMX steers had ADG of 0.44 kg/d and HXB steers had ADG of 0.81 kg/d. On Oct. 23, all ROMX and HXB steers as well as Brahman (BRM) n=10 steers were transported to a commercial feedlot and fed in pens according to breedtype to a visual backfat of 1 cm. The HXB were lightest at feedlot entry (295 kg); where as ROMX and BRM were similar at 323 and 345 kg, respectively. All three breedtypes had different feedlot ADG with ROMX at 1.46 kg/d, HXB at 1.75 kg/d, and BRM at 1.22 kg/d. Final weight of HXB steers (606 kg) was heavier than both ROMX (563 kg) and BRM steers (540 kg). Steers had similar dressing percent (63.7%), backfat (1.08 cm), marbling score (426), and ave quality grade (700). The ROMX steers tended to have better yield grade (2.53) compared to both HXB (2.90) and BRM (2.88). Warner-Bratzler shear values showed that ROMX at 3.33 kg were less than those of BRM (3.79 kg); where as HXB steers were similar to both ROMX and BRM. Cooking loss was similar for ROMX (26.8%) and HXB (27.4%), and both were less than BRM (32.6%) steers.