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Articles by Sghaier Najari
Total Records ( 3 ) for Sghaier Najari
  Amor Gaddour , Sghaier Najari and Mabrouk Ouni
  A data issued from 16 years performances schedule of local goat, Alpine, Damascus, Murciana and crossed groups was used to study the genotypes productive behaviour under Tunisian oases conditions. The aim is to evaluate the possibilities of local goat productivity improvement by cross breeding in intensive mode and also, to choose the better improving breed and the cross level. About 1923 individual goat milking data was used to evaluate the dairy potentialities of local goat, imported breeds and crossed genotypes. A statistical analysis was applied on estimated dairy performances such as, daily milk average, total production by lactation and milking period. The cross breeding with imported breeds improves the dairy performances since the first generation. The crossing between these goats races appreciably improves the dairy performance of the local goat and this, as of the first generation. The dairy production with this generation is, about 248 kg for the Alpine one, of 181 kg for Damascus and 190 kg for Murciana, is only 137 kg by lactation for the local breed.
  Amor Gaddour , Sghaier Najari and Mabrouk Ouni
  Dairy data harvested during 16 years in a goat herd composed by local goat, Alpine, Damascus, Murciana and 6 crossed groups was used in the present study. The aim is to establish the effects of genotype-environment interaction upon goat milking potentialities under oasian husbandry conditions. For each goat, total production per lactation (Kg), daily average (kg day 1) and milking period (days) were estimated by Fleischmann method. A GLM Procedure was applied to identify the interactive effects of genotype towards the year and the kidding mode, respectively. Analysis show the milk production per lactation varies differently both with genetic groups and the year of kidding. Among pure breeds the productive behaviour for each group depends largely to the year. For example, the Alpine production varied between 329 kg during 179 days and decreased to 217 kg during the year 1990/1991. The kidding mode effect seems not similar for all genetic groups, especially among crossed genotypes. Results allow to conclude that the oasian environment modulate largely the dairy potentialities of caprine genetic groups. Some genotypes have more regular performances than other subjected to the same conditions. Such interactive effect should be considered to organise genetic improvement program.
  Amor Gaddour and Sghaier Najari
  The local goat, Alpine, Damascus, Murciana and crossed groups was used to study the genotypes productive behaviour under Tunisian oases conditions. The aim is to evaluate the possibilities of local goat productivity improvement by cross breeding in intensive mode and also, to choose the better improving breed and the propice crossing level. The dairy production with this generation is, about 248 kg for the Alpine one, of 181 kg for Damascus and 190 kg for Murciana, is only 137 kg by lactation for the local breed.
 
 
 
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