The Effect of Crossbreeding on Some Economic Traits for Chicks of Lohmann Chicken
The experiment has been conducted at the poultry farm of Al-Qadisyah University, College of Agriculture, Department of Animal Production , for the period 24/11/2018 till 10/4/2019 by using 80 hatching chicks which belong to 20 dams and 5 sires, each sire includes 16 chicks. Four chickens are put wit...
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| Format: | Article |
| Language: | Arabic |
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University of Al-Qadisiya
2019-12-01
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| Series: | Al-Qadisiyah Journal For Agriculture Sciences |
| Subjects: | |
| Online Access: | https://jouagr.qu.edu.iq/article_167067_2ae03e9329dfe78c7b9fda8729bffe59.pdf |
| Summary: | The experiment has been conducted at the poultry farm of Al-Qadisyah University, College of Agriculture, Department of Animal Production , for the period 24/11/2018 till 10/4/2019 by using 80 hatching chicks which belong to 20 dams and 5 sires, each sire includes 16 chicks. Four chickens are put with each sire, the first sire( Leghorn) crossbreeding with dams of Lohmann , the remaining sires are local cocks ,with five Lohmann hens. The chicks of each sire divided into two replicates ,each replicate contains 8 chicks , the experiment continues for 42 days of age.<br /> The experiment aims to study the effect of sire groups on growth traits (weight at hatching , weight at 42 days of age , weight gain and daily weight gain ) Also , the effect of sire on weekly consumption feed , in addition to estimate the heritability for previous traits and the genetic correlations among these traits.<br /> The results can be summarized as follows :<br /> 1- The overall means of weight at hatching , weigh at 42 days of age , weight gain and daily weight gain are 34.572 , 354.898 , 320.327 and 7.627 gm respectively , the sire groups appear significantly (p0.05) effect on weight at hatching and weight at 42 days of age and weekly consumption seeds.<br /> 2- Sex has significantly (p0.05) effect on weight at hatching and weight at 42 days of age.<br /> 3- The conversion feed ratio is 3.462 gm consume feed/ gm of meat.<br /> 4- The estimated values of heritability for weight at hatching weight at 42 days of age , weight gain and daily weight gain and daily weight gain , are 0.332 , 0.55 , 0.55 and 0.56 respectively.<br /> The values of genetic correlation between weight at hatching and weight at 42 days of age and between weight at hatching and weight gain are 0.98 and 0.58 respectively. |
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| ISSN: | 2077-5822 2618-1479 |