667 Zilpaterol hydrochloride improved growth performance and some carcass characteristics in finishing ram lambs in feedlot

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 326-327
Author(s):  
J. Cayetano de Jesús ◽  
R. Rojo Rubio ◽  
H. Lee-Rangel ◽  
L. Avendaño-Reyes ◽  
U. Macias-Cruz ◽  
...  
2014 ◽  
Vol 92 (3) ◽  
pp. 1184-1192 ◽  
Author(s):  
J. L. Dávila-Ramírez ◽  
U. Macías-Cruz ◽  
N. G. Torrentera-Olivera ◽  
H. González-Ríos ◽  
S. A. Soto-Navarro ◽  
...  

2016 ◽  
Vol 61 (1) ◽  
pp. 109-114
Author(s):  
Jong Kyoo Kim ◽  
Ki Yong Chung ◽  
Hyeong Cheol Kim ◽  
Eun Mi Lee ◽  
Sun Sik Chang ◽  
...  

Animals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 667
Author(s):  
Khaleel I. Jawasreh ◽  
Ahmad H. Al-Amareen ◽  
Pauline Y. Aad

Advances in molecular genetics have allowed the identification of genes that can enhance livestock production. The aim of this study was to investigate possible relationships between the calpastatin (CAST) Hha1 gene polymorphisms and growth performance, carcass characteristics, and meat quality in Awassi sheep. A total of 87 blood samples were collected from two-week-old Awassi ram lambs. The amplification of the CAST Hha1 gene yielded a fragment of 622 bp. Three CAST genotypes were found in Awassi sheep: MM for two fragments (385 bp and 281 bp), MN for three fragments (622 bp, 385 bp, and 281 bp), and NN for only one fragment (622 bp). The M and N allele frequencies of the CAST Hha1 genotypes were 0.765 and 0.235, respectively, while the genotypic frequencies of MM, MN, and NN were 0.586, 0.356, and 0.057, respectively. Based on CAST Hha1 gene polymorphisms, three groups of lambs (MM: n = 8; MN: n = 6; and NN: n = 3 genotypes) were subjected to a fattening period of 70 days to investigate growth performance and meat characteristics. Only the final body weight and longissimus muscle width were significantly different between the three genotypes, while no significant differences were detected in any other carcass characteristics and meat quality parameters. In this study, new variants were observed in CAST using the Hha1 restriction site, potentially assisting in Awassi sheep breeding and selection programs to improve final body weight and longissimus muscle width.


2011 ◽  
Vol 89 (12) ◽  
pp. 4188-4194 ◽  
Author(s):  
L. Avendaño-Reyes ◽  
U. Macías-Cruz ◽  
F. D. Álvarez-Valenzuela ◽  
E. Águila-Tepato ◽  
N. G. Torrentera-Olivera ◽  
...  

2014 ◽  
Vol 117 (2-3) ◽  
pp. 142-150 ◽  
Author(s):  
M.A. López-Carlos ◽  
J.I. Aguilera-Soto ◽  
R.G. Ramírez ◽  
H. Rodríguez ◽  
O. Carrillo-Muro ◽  
...  

2015 ◽  
Vol 47 (3) ◽  
pp. 623-626
Author(s):  
Jagannatham Babu ◽  
Nagireddy Nalini Kumari ◽  
Yerradoddi Ramana Reddy ◽  
Thirunahari Raghunandan ◽  
Kalakuntla Sridhar

2015 ◽  
Vol 95 (4) ◽  
pp. 609-615 ◽  
Author(s):  
Miguel A. Rodríguez-Gaxiola ◽  
Ignacio A. Domínguez-Vara ◽  
Rubén Barajas-Cruz ◽  
María A. Mariezcurrema-Berasain ◽  
José L. Bórquez-Gastelum ◽  
...  

Rodríguez-Gaxiola, M. A., Domínguez-Vara, I. A., Barajas-Cruz, R., Mariezcurrema-Berasain, M. A., Bórquez-Gastelum, J. L. and Cervantes-Pacheco, B. J. 2015. Effects of zilpaterol hydrochloride and zinc methionine on growth performance and carcass characteristics of beef bulls. Can. J. Anim. Sci. 95: 609–615. Sixty beef bulls with a body weight (BW) of 314.7±16.2 kg were used to evaluate the effects of zilpaterol hydrochloride (ZH) and zinc methionine (ZM) on growth performance and carcass characteristics. The experimental design was a randomized complete block, with a factorial 2×2 arrangement of treatments (ZH: 0 and 0.15 mg kg−1 BW; ZM: 0 and 80 mg kg−1 dry matter). The ZH increased (P<0.05) the final BW, average daily gain, feed conversion, carcass yield and longissimus dorsi area. Bulls fed ZH plus ZM had less (P<0.01) backfat thickness and intramuscular fat (IMF) compared with those fed ZH or ZM alone. The ZH increased (P<0.02) the meat crude protein content and cooking loss. It is therefore concluded that ZH increases growth performance, carcass yield, longissimus dorsi area, and meat crude protein. The interaction of ZM and ZH did not present additional advantages. The reason for the reduction in backfat thickness and IMF by ZH plus ZM is unclear, and implies that our knowledge of β-agonistic adrenergic substances and their interactions with minerals is incomplete.


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