The Intensity of MLLT Area Changes and Development of the Selected Body Parts Muscling in Bulls and Heifers of Blonded’ Aquitaine Cattle and its Crossbreeds During Rearing Period

الموضوعات :

L. Stadnik ¹ (PDepartment of Animal Husbandry, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague 6–Suchdol, Czech Republic)
J. Dvorakova ² (PDepartment of Animal Husbandry, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague 6–Suchdol, Czech Republic)
F. Louda ³ (PDepartment of Animal Husbandry, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague 6–Suchdol, Czech Republic)

تاريخ الإرسال : 25 الثلاثاء , ذو القعدة, 1431 تاريخ التأكيد : 21 السبت , ذو الحجة, 1431 تاريخ الإصدار : 03 الخميس , شوال, 1432

الکلمات المفتاحية: sex, birthseason, breed, muscling score, musculus longissimus lumborum et thoracis,

ملخص المقالة :

The objective of this work was to determine the effect of sex, breed and birth season of calves on intensity of MLLT (musculus longissimus lumborum et thoracis) area changes and development of the selected body parts in bulls and heifers of Blonde d´Aquitaine (BA) cattle during rearing period. Two generations of bulls (n=63) and heifers (n=68) of Blonde d´Aquitaine (n=61) and crossbreds C×BA (C-Czech Fleckvieh) (n=70) born from December 2004 to June 2006 were evaluated. MLLT area measurements and subjective evaluations of 3 basic body areas muscling (shoulder, back and rump) on live animals were performed at 120, 210 and 365 days of animal age. Statistically significant differences were determined in shoulder, back, and rump muscling in relation to animal sex in favor of bulls at 120 and 210 days of age (P

المصادر:

Bouška J., Doležal O., Jílek F., Kudrna V., Kvapilík J., Přibyl J., r-Rajmon R., Sedmíková M., Skřivanová V., Šlosárková S., Tyrolová Y., Vacek M. and Žižlavský J. (2006). Chov dojeného skotu-breeding of dairy cattle. Profi Press, S.R.O., Praha, 184 p.
Bukač V., Kolářský F., Pařilová M., Louda F. and Štolc L. (2005). Ultrasonic detection of growth potential in reared and fattened Herefors bulls. Sci. Agric. Bohem. 36, 55-61.
Bullock K.D., Bertrand J.K., Benyshek L.L., Williams S.E. and Lust D.G. (1991). Comparison of real time ultrasound and other live measures to carcassmeasures as predictors of beef cow energy stores. J. Anim. Sci.69, 3908-3916.
Crews D.H., Shannon Jr. N.H., Crews R.E. and Kemp R.A. (2002). Weaning yearling and preharvest ultrasound measures of fat and muscle area in steers, bulls and heifers. J. Anim. Sci.80, 2817-2824.
Grings E.E., Short R.E., Mac Neil M.D., Haferkamp M.R. and Adams D.C. (1996). Efficiency of production in cattle of two growth potentials on northern great plains rangelands during spring-summer grazing. J. Anim. Sci.74, 2317-2326.
Kolářský F., Bukač V. and Louda F. (2004). Sonografické stanovení růstového potenciálu u chovných a vykrmovaných býků plemene hereford. In: Proceedings to conference “Genetic bases of breeding to carcass quality and beef production with using of steer fattening”. Association of Beef Cattle Breeders Rapotín a VÚCHS Rapotín, Czech Republic. Pp. 114-121.
Mc Laren D.G., Novakofski J. and Parrett D.F. (1991). A study of operator effects on ultrasonic measures of fat depth and longissimus muscle area in cattle, sheep and pigs. J. Anim. Sci.67, 54-66.
Nová V., Štolc L., Louda F. and Stříbrný P. (1997). Tělesné rozměry u telat plemene Limousine, České strakaté a jejich kříženců ve věku 120 a 210 dní. Proceedings from conference “Actual problems of cattle breeding, health, growth and production”. České Budějovice, Czech Republic, Pp.410.
Nová V., Vaněk D. and Rákos M. (2002). Využití sonografu pro odhad zmasilosti u vybraných masných plemen skotu. Proceedings from “Conference to 50^th Anniversary of Czech University of Agriculture”, Prague, Czech Republic. Pp.131.
Perkins T.L., Green R.D., Hamlin K.E., Shepard H.H. and Miller M.F. (1992). Ultrasonic prediction of carcass merit in beef cattle: Evaluation of technician effects on ultrasonic estimates of carcass fat thickness and longissimus muscle area. J. Anim. Sci. 70,178.
PerkinsT.L., Paschal J.C., Tipton N.C. and Delazerda M.J.(1997).
Ultrasonic prediction of quality grade and percent retail cuts in beef cattle. J. Anim. Sci.75,178.
Polák P. and Daňo J. (2002). Prínos sonografie k objektivizácii speňažovania jatočných býkov. Proceedings from international conference “Cattle in New Millenium”. SPU Nitra, Slovak Republic. Pp. 132-135.
Realini C.E., Williams R.E., Pringle T.D. and Bertrand J.K. (2001). Gluteus medius and rump fat depths as additional live animal ultrasound measurements for predicting retail product and trimmable fat in beef carcasses. J. Anim. Sci.79, 1378-1385.
Stádník L., Ježková A., Louda F., Dvořáková J. and Štolc L. (2009). The relationships among lumbar region width, back muscling and musculus longissimus lumborum et thoraci area in Blonde d’Aquitaine bulls and heifers during rearing period. Arch. Tierz. 52, 243-254.
Šubrt J., Diviš V., Polách P. and Bjelka M. (2002). Porovnání kvality masa kříženců po otcích masných plemen. Proceedings from international conference “Cattle in New Millenium”. SPU Nitra, Slovak Republic. 211-216.
Toušová R., Stádník L., Louda F. and Řehounek V. (2009). Vliv vybraných faktorů na hmotnost býků a jalovic plemene charolais ve 120, 210 a 365 dnech věku. Výzkum v chovu skotu-Cattle Res. 51, 3-10.
Waldner D.N., Dikeman M.E., Schalles R.R., Olson W.G., Houghton P.L., Unruh J.A. and Corah L.R. (1992). Validation of real-time ultrasound technology for predicting fat thickness, longissimus muscle area, and composition of Brangus bulls from 4 months to 2 years of age. J. Anim. Sci.70, 30-44.
Zahrádková R., Bartoň L., Brychta J., Bureš D., Doležal O., Illek J., Kaplanová K., Kvapilík J., Rozsypal R., Skládanka J., Slavík J., Stehlík L., Stejskalová E., Stěhulová I., Šárová R., Šeba K., Špinka M., Teslík V., Veselá Z., Vostrý L., Zeman L. and Žďárský P. (2009). Masný skot of A do Z-Beef Cattle from A to Z. Czech Beef Breeder Association, Prague, Czech Republic, Pp. 397.