Abstract
Linear assessment of the type and body development provides very important information on the total value of animals for the purpose of breeding animals selected and classified into classes. Determination of the average values of exterior parameters, especially non-measurable traits, is useful in defining breeding objectives and formulating effective plans and programs. Given that previous studies found statistically significant differences among daughters of Simmental bulls for some properties of the exterior, the objective of this paper was to compare linear type traits and body development of daughters of Simmental bulls in the Rasina region. Based on linear type traits and body development, the most significant results were achieved by daughters of bull No. 1464 (Ralfus) for the frame, muscularity and form, and by daughters of bull No. 1488 (Hormaz) for udder appearance. If each attribute is analyzed separately, bull No. 1411 (Horau) is equally significant for the traits for which its daughters showed the best performance.
Highlights
The basis for selection work is knowledge of the quality of bull sires used for conception, as well as how major traits are passed on to their progeny (Pantelic et al 2011a)
To determine the average values of linear type traits and body development in daughters of Simmental bulls, documented data were obtained from the main breeding organization developing and conducting breeding programs in the Rasina region which belongs to the statistical region of Šumadija and Western Serbia
Muscle development of cattle was evaluated based on the occupancy of the aft fuselage muscle tissue, with length of the leg and muscles of the pelvis and lumbar back considered (Pantelic et al 2005, Pantelic et al 2007a)
Summary
The basis for selection work is knowledge of the quality of bull sires used for conception, as well as how major traits are passed on to their progeny (Pantelic et al 2011a). Type and body development scores are very important indicators of the production ability of cows, their potential to consume sufficient quantities of food, produce technologically high quality milk, reduce the use of energy in production and remain as long as possible in exploitation (Pantelic et al 2011b). Proper body development of productive cows is the basis for normal morpho-physiological functions. To improve the body development of the domestic Simmental breed population and use it as the basis for improved functional milk production, in addition to using the existing results, it is essential to pay attention to additional parameters primarily related to the knowledge of the phenotypic and genotypic correlation traits of body development, fertility and productivity within one sex and between the sexes (Bogdanovic et al 2006). Taking into account the appearance of descendants and their proper selection, greatly reducing the possibility of transferring negative characteristics of parental couples can wear it as a recessive, which is due to the massive use of artificial insemination can quickly spread in the population (Posavi et al 1999; Pantelic et al 2007a)
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