Phenotype variability of external quality traits of fertile eggs of partridge Italian bread in semi extensive breeding system

Abstract

In this paper results of research of external quality traits of the fertile eggs of Partridge Italian bread in semi extensive system are shown. Research was conducted on sample of 64 eggs, divided in to two groups according to the weight. First group was eggs weighing up to the 60 g (≤ 60 g) and second group eggs weighing above 60 g (> 60 g). Aim of the research was to determine influence of the weight of the eggs to the external quality traits of fertile eggs, such as weight, length, width and shape index of the eggs in quoted breeding system. Obtained result points to the fact that Partridge Italian in semi extensive system achieves satisfying results in regard of the basic external characteristics of egg quality. Results of the conducted research show that it is needed to give higher attention to the quality of eggs used for planting, to the breeding direction, improvement of the productive and reproductive traits, and therefore to preservation of the genetic potential of different breeds and strains of chicken.

U radu su izloženi rezultati ispitivanja spoljašnjih osobina kvaliteta priplodnih jaja jarebičaste italijanke gajene u poluekstenzivnom sistemu držanja. Ispitivanja su izvršena na uzorku od 64 jajeta, podeljenih u dve težinske grupe i to: I grupa - jaja težine do 60 g (≤ 60 g) i II grupa - jaja težine preko 60 g (> 60 g). Cilj istraživanja je bio da se ispita uticaj težinske grupe jaja na spoljašnje osobine kvaliteta priplodnih jaja, kao što su težina, dužina, širina i indeks oblika jaja u navedenom sistemu držanja. Dobijeni rezultati ukazuju na činjenicu da jarebičasta italijanka u poluekstenzivnom sistemu gajenja ostvaruje zadovoljavajuće rezultate u pogledu osnovnih karakteristika spoljašnjeg kvaliteta jaja. Rezultati sprovedenih istraživanja ukazuju na to da je potrebno posvetiti veću pažnju ispitivanju kvaliteta jaja za nasad, pravcu odgajivanja, poboljšanju proizvodnih i reproduktivnih sposobnosti, a samim tim i očuvanju genetskog potencijala različitih rasa i sojeva kokoši.