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首页> 外文期刊>Tropical Animal Health and Production >Effect of incorporation of thermo-regulatory genes into exotic layers on egg production and quality under tropical environment.
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Effect of incorporation of thermo-regulatory genes into exotic layers on egg production and quality under tropical environment.

机译：在热带环境下，将温度调节基因掺入外来层对产蛋量和品质的影响。

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摘要

A breed development strategy aimed at making exotic layers (Lohmann Brown) more productive under tropical environment using thermo-regulatory genes is underway at Akate Farms in Kumasi, Ghana. The present experiment was carried out to find out the effect of the genes on egg production in hot and humid environments. Three genetic groups comprising naked-neck, frizzle and their normally feathered sibs were obtained after successive generations of crossing between naked-neck and frizzle cocks and Lohmann brown hens. A total of 270 18-week-old pullets, 90 each of the 3 groups, were selected randomly and assigned to a completely randomized design experiment with 3 replicates, with 30 birds in each replicate group and kept up to a period of 72 weeks. The birds were kept in a partitioned open-sided deep-litter house constructed with sandcrete blocks with 30 pullets in each compartment. They were fed ad libitum with layer diets containing 18% crude protein and 2,800 kcal ME/kg. Results obtained showed that the crossbred naked-neck and frizzle phenotypes produced eggs at a significantly (P<0.05) higher rates than their normally feathered sibs and also out-performed their normally feathered sibs in other egg production parameters measured, even though they all segregated from similar parents. This is an indication of the favourable effect of the genes on egg production under hot and humid environments.
机译：加纳库马西的Akate农场正在实施一种旨在利用热调节基因在热带环境下提高外来蛋鸡（Lohmann Brown）生产力的品种开发策略。进行本实验以发现基因在炎热和潮湿环境中对蛋生产的影响。在裸颈和翻毛公鸡与罗曼棕母鸡相继世代杂交后，获得了三个基因组，包括裸颈，毛躁和它们正常羽毛的同胞。随机选择总共270只18周龄的小母鸡，三组各90只，分配给一个完全随机的设计实验，该实验有3个重复，每个重复组有30只家禽，最多饲养72周。这些鸟被关在一个分隔开的，侧向乱抛垃圾的房屋中，该房屋由砂砖砌成，每个隔间有30个小鸡。给他们随意饲喂含18％粗蛋白和2,800 kcal ME / kg的蛋鸡日粮。获得的结果表明，杂种裸颈和毛躁表型产生的卵比正常羽生的同胞显着高（P <0.05），并且在所有测得的产蛋参数上也比正常羽生的同胞好，即使它们都分开来自相似的父母。这表明该基因在炎热和潮湿环境下对产蛋的有利作用。

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