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Raach-Moujahed A.,Ecole Superieure dAgriculture de Mateur | Haddad B.,Institute National Agronomique Of Tunis | Moujahed N.,Institute National Agronomique Of Tunis | Bouallegue M.,Faculte des science Mathematiques
International Journal of Poultry Science | Year: 2011

Local and indigenous poultry in Tunisia represent very diversified and heterogeneous populations which remain largely unknown and understudied in spite of the real economic assets that they seemed to represent mainly in rural areas. The present study was envisaged in the objective of conservation, valorization and development of this rustic and well adapted genetic substrate. In this respect growth parameters were measured and meat quality measurements on pH and color (L*: luminance, a*: yellowness b*: redness) were operated. Results showed that a mean Body Weight (BW) of 632 g was reached at week 8, 923 g at week 12 and 1249 g at week 16, with mean Daily Weight Gain (DWG) of 16.72, 11.26 and 10.89 g/d respectively. Males were found to be more (p<0.05) performing than females both in BW and DWG at all ages. The ultime meat pH value after 24 h of slaughtering was relatively high (6.1) and color parameters in the main muscles were particularly intense. Feed Conversion Ratio (FCR) was relatively low (3.97) and remained far lower than several other local populations studied in some European and African countries. It was concluded that Tunisian local poultry presented potentially interesting growth parameters and meat quality characteristics. In addition to the high potential of selection and crosses possibilities, they could represent a strong argument of development of local production systems for rural populations. Thereby, an urgent program of screening, evaluation and conservation of these populations is to be conceived and applied. © Asian Network for Scientific Information, 2011. Source


Tajini F.,French National Institute for Agricultural Research | Trabelsi M.,Ecole Superieure dAgriculture de Mateur | Drevon J.-J.,French National Institute for Agricultural Research
Saudi Journal of Biological Sciences | Year: 2012

This study compared the response of common bean (Phaseolus vulgaris L.) to arbuscular mycorrhizal fungi (AMF) and rhizobia strain inoculation. Two common bean genotypes i.e. CocoT and Flamingo varying in their effectiveness for nitrogen fixation were inoculated with Glomus intraradices and Rhizobium tropici CIAT899, and grown for 50. days in soil-sand substrate in glasshouse conditions. Inoculation of common bean plants with the AM fungi resulted in a significant increase in nodulation compared to plants without inoculation. The combined inoculation of AM fungi and rhizobia significantly increased various plant growth parameters compared to simple inoculated plants. In addition, the combined inoculation of AM fungi and rhizobia resulted in significantly higher nitrogen and phosphorus accumulation in the shoots of common bean plants and improved phosphorus use efficiency compared with their controls, which were not dually inoculated. It is concluded that inoculation with rhizobia and arbuscular mycorrhizal fungi could improve the efficiency in phosphorus use for symbiotic nitrogen fixation especially under phosphorus deficiency. © 2011. Source


Tajini F.,French National Institute for Agricultural Research | Trabelsi M.,Ecole Superieure dAgriculture de Mateur | Drevon J.-J.,French National Institute for Agricultural Research
Symbiosis | Year: 2011

Common bean (Phaseolus vulgaris L.) genotypes CocoT and Flamingo were inoculated with Rhizobium tropici CIAT899 and Glomus intraradices (Schenck & Smith) and grown under sufficient versus deficient phosphorus supply for comparing the effects of double inoculation on growth, nodulation, mycorrhization of the roots, phosphorus use efficiency and total nitrogen. Although the double inoculation induced a significant increase in all parameters whatever the phosphorus supply in comparison to control, significant differences were found among genotypes and treatments. Nevertheless, the highest phosphorus use efficiency and plant total nitrogen were found under P deficiency in combination with arbuscular mycorrhizal fungi. It is concluded that inoculation with rhizobia and arbuscular mycorrhizal fungi could improve symbiotic nitrogen fixation even under phosphorus deficiency. © 2011 Springer Science+Business Media B.V. Source


Raach-Moujahed A.,Ecole Superieure dAgriculture de Mateur | Moujahed N.,Institute National Agronomique Of Tunisie | Haddad B.,Institute National Agronomique Of Tunisie
Livestock Research for Rural Development | Year: 2011

The traditional poultry system always existed in Tunisia mainly in rural regions and around urban areas. Meat and eggs from local poultry population are more and more claimed by consumer mainly for presumed higher sensorial and gustative qualities. This publication discusses the present situation of the traditional poultry production, mainly current performances and constraints and presents some alternatives to improve productivity of local bird such as coupled genetic and management actions, outdoor or moreover, organic systems. These alternatives may contribute to establish sustainable traditional farming, to define labeled products and finally to enhance farmers income. Source


Zaabza H.B.,Institute national agronomique | Gara A.B.,Ecole Superieure dAgriculture de Mateur | Hammami H.,University of Liege | Ferchichi M.A.,Institute national agronomique | Reki B.,Ecole Superieure dAgriculture de Mateur
Archiv Tierzucht | Year: 2016

A multi-trait repeatability animal model under restricted maximum likelihood (REML) and Bayesian methods was used to estimate genetic parameters of milk, fat, and protein yields in Tunisian Holstein cows. The estimates of heritability for milk, fat, and protein yields from the REML procedure were 0.21 ± 0.05, 0.159 ± 0.04, and 0.158 ± 0.04, respectively. The corresponding results from the Bayesian procedure were 0.273 ± 0.02, 0.198 ± 0.01, and 0.187 ± 0.01. Heritability estimates tended to be larger via the Bayesian than those obtained by the REML method. Genetic and permanent environmental variances estimated by REML were smaller than those obtained by the Bayesian analysis. Inversely, REML estimates of the residual variances were larger than Bayesian estimates. Genetic and permanent correlation estimates were on the other hand comparable by both REML and Bayesian methods with permanent environmental being larger than genetic correlations. Results from this study confirm previous reports on genetic parameters for milk traits in Tunisian Holsteins and suggest that a multi-trait approach can be an alternative for implementing a routine genetic evaluation of the Tunisian dairy cattle population. © Author(s) 2016. Source

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