Original scientific paper
THE EFFECT OF CROSSING BETWEEN LANDRACE AND YORKSHIRE IN RELATION TO MATERNAL HETEROZIS
Dragomir Lukač
; Faculty of Agriculture Novi Sad, Novi Sad, Serbia
Vitomir Vidović
; Faculty of Agriculture Novi Sad, Novi Sad, Serbia
Jovanka Krnjaić
; DELTA Agrar, Stara Pazova, Stara Pazova, Serbia
Ljuba Štrbac
; Faculty of Agriculture Novi Sad, Novi Sad, Serbia
Vladislav Višnjić
; Carnex Ltd, Meat industry,Vrbas, Vrbas, Serbia
Milanko Stupar
; Faculty of Agriculture Novi Sad, Novi Sad, Serbia
Abstract
The analysis was done at a nucleus and two commercial farms using 1243 purebred Danish Landrace (LL) and Danish Yorkshire (YY) sows and 1344 F1 produced by reciprocal crossing between them. Selection criteria were the same for DL and DY. So, as expected the reciprocal crosses showed no significant differences between them on reproduction traits. But the differences between purebreds and their product of F1 sows showed statistically significant effect (P< 0.05) named as maternal heterosis. The F1 sows compared to purebreds, showed superiority of the following traits: age at first fertile mating, number of alive born and stillborn piglets, weight at birth, number of piglets and weight at weaning, daily gain at suckling. All these differences were statistically significant (P<0.05). The level of heterosis was measured as the differences of average between DL and DY compared to their F1 sows. Value of heterosis showed variation from 4.7% for age at first fertile mating to 8.72% for number of live piglets. The statistical analysis confirms significant differences between farms. Season effect at both farms showed statistically significant differences. Most of the analyzed traits showed similar tendency in purebred as well as in F1 during production life.
Keywords
reproductive traits of pigs; crossbreeding; heterosis effec
Hrčak ID:
99936
URI
Publication date:
28.2.2013.
Visits: 1.357 *