{"id":2730,"date":"2020-11-18T03:37:20","date_gmt":"2020-11-18T03:37:20","guid":{"rendered":"http:\/\/agri-research-journal.net\/SjarEn\/?p=2730"},"modified":"2020-11-18T03:37:21","modified_gmt":"2020-11-18T03:37:21","slug":"evaluation-of-the-productivity-of-some-goats-genotypes-for-%e2%80%8egrowth-and-dairy-performances-under-oases-breeding-%e2%80%8emode","status":"publish","type":"post","link":"https:\/\/agri-research-journal.net\/SjarEn\/?p=2730","title":{"rendered":"Evaluation of The Productivity of Some Goat\u2019s Genotypes for \u200eGrowth And Dairy Performances Under Oases Breeding \u200eMode"},"content":{"rendered":"\n

Najari Sghaier(1)<\/sup> Atoui Ahlem*(1)<\/sup> and Abdennebi Moldi(1)<\/sup><\/strong><\/p>\n\n\n\n

 (1).\nInstitute of Arid Regions, Faculty of sciences (F.S.G) Gab\u00e9s, University of Gab\u00e9s, M\u00e9denine. Tunisia. <\/p>\n\n\n\n

(* Corresponding author: Dr. Atoui Ahlem, E-mail : ahlematoui@gmail.com<\/a>).<\/p>\n\n\n\n

Received: 08\/06\/2020                               Accepted: 22\/09\/2020<\/p>\n\n\n\n

Abstract<\/strong><\/p>\n\n\n\n

The study aimed to develop a set of indicators of an\neconomic and biological nature that can be adopted from a better evaluation of\nthe productivity of different genetic groups resulting from the local breeding\nprogram for goats with improved and specialized breeds in the oases of southern\nTunisia. The proposed indicators depend on adjusting the average qualifications\nof milk and meat production for each genetic group, by taking into account the\noutcome of the breeding season and the cost of breeding for each group\nseparately. The database was collected over\na period of 22 years in the caprine herd of the Arid Areas Institute of\nM\u00e9denine. It consisted of direct records of 1,654 weights and\n993 records of periodic milk production for members of the domestic goat herd,\nimported breeds, and hybrid groups. The proposed economic and vital indicators\nare based on collecting and adjusting all the components of milk production and\ngrowth of the goat by calculating the reproductive data, mortality, infertility\nand abortion. In the second stage, the productivity obtained above is modified\nby dividing it by the average metabolic weight (P 0.75<\/sup>), which\nreduces the cost of breeding, which is correlated with the relative body size\nand feeding requirements in particular, which differ from one genetic group to\nanother. The application of economic and biological indicators led to a\nclassification and evaluation of productivity completely different from what\nwas obtained based on a comparison of individual performance and production\nonly as usual and which does not reflect the true effectiveness of the\nheterogeneous herds. It was noted that some strains, with high performance from\nmilk products or heavy weights in weaning, were subject to evaluation\ninfluencing their ranking due to infertility rates or high mortality. Moreover,\nthe correction by metabolic weight has profoundly altered the genetic\ndifference arrangement in favor of local goats and marsiana<\/em> with small\nsizes compared to latin<\/em>, damascene and hybrid goats. Consequently, the\nincorporation of all productive components and animal behavior into the\nevaluation criteria provides effective technical means for comparing the\nproductive performance of heterogeneous herds which supports the effectiveness\nof genetic improvement programs. Improvements can be made to the studied\nindicators by calculating other elements that interfere in the outcome of\neducation or by adopting individual indicators instead of the medium, which is\nincluded in future studies.<\/p>\n\n\n\n

Key words:<\/strong> Productivity assessment indicators, Local goats, Crossbreeding, Metabolic weight. <\/p>\n\n\n\n

Full paper in English: PDF<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Najari Sghaier(1) Atoui Ahlem*(1) and Abdennebi Moldi(1)  (1). Institute of Arid Regions, Faculty of sciences (F.S.G) Gab\u00e9s, University of Gab\u00e9s, M\u00e9denine. Tunisia. (* Corresponding author: Dr. Atoui Ahlem, E-mail : ahlematoui@gmail.com). Received: 08\/06\/2020                               Accepted: 22\/09\/2020 Abstract The study aimed … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2730","post","type-post","status-publish","format-standard","hentry","category-sjar"],"_links":{"self":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2730"}],"version-history":[{"count":1,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2730\/revisions"}],"predecessor-version":[{"id":2731,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=\/wp\/v2\/posts\/2730\/revisions\/2731"}],"wp:attachment":[{"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agri-research-journal.net\/SjarEn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}