There is a paucity of published work on genetic evaluation of lactation traits in camels using modern methodologies such as MTDFREML (Maximum Likelihood Restricted by Multiple Trait Derivatives Free of Maximum). The current study aimed to estimate the genetic parameters (direct heritability, repeatability and breeding values), and to estimate the phenotypic trend. The studies were including total milk yield (TMY/kg), day milk yield (DMY/ kg) and length of lactation period (LP). Actual means of TMY, DMY and LP were 1464.90 kg, 4.00 and 418.84, respectively. LP was significantly (P≤0.05) affected by the year and season of calving. Additive heritability (h2a) estimates for TMY, DMY and LP was 0.25, 0.30 and 0.17, respectively. These are promising values for the potential of genetic improvement. Repeatability (t) values recorded a medium value for LP (0.19), while the values were high for both TMY (0.36) and DMY (0.43). The range of predicted breeding values (PBVs) of animals for TMY, DMY and LP were 143.07 kg, 1.5 kg and 113.9 days, respectively. Regression coefficients for she-camels showed a negative annual phenotypic trend (PT) of about -3.58 kg and -0.012 kg per year for TMY and DMY, respectively. A genetic improvement program should be followed to allow exploiting the higher estimates of genetic parameters by relying on animals with positive breeding values.
| Published in | Animal and Veterinary Sciences (Volume 10, Issue 5) |
| DOI | 10.11648/j.avs.20221005.11 |
| Page(s) | 119-125 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2024. Published by Science Publishing Group |
Genetic, Phenotypic Trend, Lactation, Dromedary Camels
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APA Style
Mohamed Ibrahim Shehab El-Din, Ahmed Mousa Amer, Amal Abdel-Kareem Othman, Mona Mohamed Sobhy, Mohammed Atef Kamal El-den. (2022). Genetic Evaluation and Phenotypic Trend for Some Lactation Traits of Dromedary Camels. Animal and Veterinary Sciences, 10(5), 119-125. https://doi.org/10.11648/j.avs.20221005.11
ACS Style
Mohamed Ibrahim Shehab El-Din; Ahmed Mousa Amer; Amal Abdel-Kareem Othman; Mona Mohamed Sobhy; Mohammed Atef Kamal El-den. Genetic Evaluation and Phenotypic Trend for Some Lactation Traits of Dromedary Camels. Anim. Vet. Sci. 2022, 10(5), 119-125. doi: 10.11648/j.avs.20221005.11
AMA Style
Mohamed Ibrahim Shehab El-Din, Ahmed Mousa Amer, Amal Abdel-Kareem Othman, Mona Mohamed Sobhy, Mohammed Atef Kamal El-den. Genetic Evaluation and Phenotypic Trend for Some Lactation Traits of Dromedary Camels. Anim Vet Sci. 2022;10(5):119-125. doi: 10.11648/j.avs.20221005.11
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author = {Mohamed Ibrahim Shehab El-Din and Ahmed Mousa Amer and Amal Abdel-Kareem Othman and Mona Mohamed Sobhy and Mohammed Atef Kamal El-den},
title = {Genetic Evaluation and Phenotypic Trend for Some Lactation Traits of Dromedary Camels},
journal = {Animal and Veterinary Sciences},
volume = {10},
number = {5},
pages = {119-125},
doi = {10.11648/j.avs.20221005.11},
url = {https://doi.org/10.11648/j.avs.20221005.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.avs.20221005.11},
abstract = {There is a paucity of published work on genetic evaluation of lactation traits in camels using modern methodologies such as MTDFREML (Maximum Likelihood Restricted by Multiple Trait Derivatives Free of Maximum). The current study aimed to estimate the genetic parameters (direct heritability, repeatability and breeding values), and to estimate the phenotypic trend. The studies were including total milk yield (TMY/kg), day milk yield (DMY/ kg) and length of lactation period (LP). Actual means of TMY, DMY and LP were 1464.90 kg, 4.00 and 418.84, respectively. LP was significantly (P≤0.05) affected by the year and season of calving. Additive heritability (h2a) estimates for TMY, DMY and LP was 0.25, 0.30 and 0.17, respectively. These are promising values for the potential of genetic improvement. Repeatability (t) values recorded a medium value for LP (0.19), while the values were high for both TMY (0.36) and DMY (0.43). The range of predicted breeding values (PBVs) of animals for TMY, DMY and LP were 143.07 kg, 1.5 kg and 113.9 days, respectively. Regression coefficients for she-camels showed a negative annual phenotypic trend (PT) of about -3.58 kg and -0.012 kg per year for TMY and DMY, respectively. A genetic improvement program should be followed to allow exploiting the higher estimates of genetic parameters by relying on animals with positive breeding values.},
year = {2022}
}
TY - JOUR T1 - Genetic Evaluation and Phenotypic Trend for Some Lactation Traits of Dromedary Camels AU - Mohamed Ibrahim Shehab El-Din AU - Ahmed Mousa Amer AU - Amal Abdel-Kareem Othman AU - Mona Mohamed Sobhy AU - Mohammed Atef Kamal El-den Y1 - 2022/09/28 PY - 2022 N1 - https://doi.org/10.11648/j.avs.20221005.11 DO - 10.11648/j.avs.20221005.11 T2 - Animal and Veterinary Sciences JF - Animal and Veterinary Sciences JO - Animal and Veterinary Sciences SP - 119 EP - 125 PB - Science Publishing Group SN - 2328-5850 UR - https://doi.org/10.11648/j.avs.20221005.11 AB - There is a paucity of published work on genetic evaluation of lactation traits in camels using modern methodologies such as MTDFREML (Maximum Likelihood Restricted by Multiple Trait Derivatives Free of Maximum). The current study aimed to estimate the genetic parameters (direct heritability, repeatability and breeding values), and to estimate the phenotypic trend. The studies were including total milk yield (TMY/kg), day milk yield (DMY/ kg) and length of lactation period (LP). Actual means of TMY, DMY and LP were 1464.90 kg, 4.00 and 418.84, respectively. LP was significantly (P≤0.05) affected by the year and season of calving. Additive heritability (h2a) estimates for TMY, DMY and LP was 0.25, 0.30 and 0.17, respectively. These are promising values for the potential of genetic improvement. Repeatability (t) values recorded a medium value for LP (0.19), while the values were high for both TMY (0.36) and DMY (0.43). The range of predicted breeding values (PBVs) of animals for TMY, DMY and LP were 143.07 kg, 1.5 kg and 113.9 days, respectively. Regression coefficients for she-camels showed a negative annual phenotypic trend (PT) of about -3.58 kg and -0.012 kg per year for TMY and DMY, respectively. A genetic improvement program should be followed to allow exploiting the higher estimates of genetic parameters by relying on animals with positive breeding values. VL - 10 IS - 5 ER -
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