Cargando…

Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen

A total of 956 lactation records of Holstein cows kept at Kaa Albon station, Imuran Governorate, Yemen during the period from 1991 to 2003 were used to investigate the effect of some genetic and non-genetic factors (Sire, parity, season of calving, year of calving and age at first calving as covaria...

Descripción completa

Detalles Bibliográficos
Autores principales: Al-Samarai, F.R., Abdulrahman, Y.K., Mohammed, F.A., Al-Zaidi, F.H., Al-Anbari, N.N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Faculty of Veterinary Medicine, University of Tripoli and Libyan Authority for Research, Science and Technology 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629572/
https://www.ncbi.nlm.nih.gov/pubmed/26623356
_version_ 1782398588368715776
author Al-Samarai, F.R.
Abdulrahman, Y.K.
Mohammed, F.A.
Al-Zaidi, F.H.
Al-Anbari, N.N.
author_facet Al-Samarai, F.R.
Abdulrahman, Y.K.
Mohammed, F.A.
Al-Zaidi, F.H.
Al-Anbari, N.N.
author_sort Al-Samarai, F.R.
collection PubMed
description A total of 956 lactation records of Holstein cows kept at Kaa Albon station, Imuran Governorate, Yemen during the period from 1991 to 2003 were used to investigate the effect of some genetic and non-genetic factors (Sire, parity, season of calving, year of calving and age at first calving as covariate) on the Total Milk Yield (TMY), Lactation Length (LL), and Dry Period (DP). Components of variance for the random effects (mixed model) were estimated by Restricted Maximum Likelihood (REML) methodology. Sires were evaluated for the TMY by three methods, Best Linear Unbiased Prediction (BLUP) using Harvey program, Transmitting Ability (TA) according to the Least Square Means of sire progeny (TALSM) and according to Means (TAM). Results showed that TMY and DP were affected significantly (P < 0.01) by all factors except season of calving and age at first calving, while LL was affected significantly (P< 0.01) only by year of calving and parity. The averages of the TMY, LL, and DP were 3919.66 kg, 298.28 days, and 114.13 days respectively. The corresponding estimates of heritability (h(2)) were 0.35, 0.06, and 0.14 respectively. The highest and lowest BLUP values of sires for the TMY were – 542.44 kg and 402.14 kg, while the corresponding estimates for TALSM and TAM were – 470.38, 380.88 kg and – 370.12, 388.50 kg respectively. The Spearman rank correlation coefficients among BLUP, TALSM and TAM ranged from 0.81 to 0.67. These results provide evidence that the selection of sires will improve the TMY in this herd because of the wide differences in genetic poetical among sires, and a moderate estimation of heritability.
format Online
Article
Text
id pubmed-4629572
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Faculty of Veterinary Medicine, University of Tripoli and Libyan Authority for Research, Science and Technology
record_format MEDLINE/PubMed
spelling pubmed-46295722015-11-30 Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen Al-Samarai, F.R. Abdulrahman, Y.K. Mohammed, F.A. Al-Zaidi, F.H. Al-Anbari, N.N. Open Vet J Original Article A total of 956 lactation records of Holstein cows kept at Kaa Albon station, Imuran Governorate, Yemen during the period from 1991 to 2003 were used to investigate the effect of some genetic and non-genetic factors (Sire, parity, season of calving, year of calving and age at first calving as covariate) on the Total Milk Yield (TMY), Lactation Length (LL), and Dry Period (DP). Components of variance for the random effects (mixed model) were estimated by Restricted Maximum Likelihood (REML) methodology. Sires were evaluated for the TMY by three methods, Best Linear Unbiased Prediction (BLUP) using Harvey program, Transmitting Ability (TA) according to the Least Square Means of sire progeny (TALSM) and according to Means (TAM). Results showed that TMY and DP were affected significantly (P < 0.01) by all factors except season of calving and age at first calving, while LL was affected significantly (P< 0.01) only by year of calving and parity. The averages of the TMY, LL, and DP were 3919.66 kg, 298.28 days, and 114.13 days respectively. The corresponding estimates of heritability (h(2)) were 0.35, 0.06, and 0.14 respectively. The highest and lowest BLUP values of sires for the TMY were – 542.44 kg and 402.14 kg, while the corresponding estimates for TALSM and TAM were – 470.38, 380.88 kg and – 370.12, 388.50 kg respectively. The Spearman rank correlation coefficients among BLUP, TALSM and TAM ranged from 0.81 to 0.67. These results provide evidence that the selection of sires will improve the TMY in this herd because of the wide differences in genetic poetical among sires, and a moderate estimation of heritability. Faculty of Veterinary Medicine, University of Tripoli and Libyan Authority for Research, Science and Technology 2015 2015-02-14 /pmc/articles/PMC4629572/ /pubmed/26623356 Text en Copyright: © Open Veterinary Journal http://creativecommons.org/licenses/by-nc-sa/4.0 Open Veterinary Journal is licensed under a Creative Commons Attribution 4.0 International License.
spellingShingle Original Article
Al-Samarai, F.R.
Abdulrahman, Y.K.
Mohammed, F.A.
Al-Zaidi, F.H.
Al-Anbari, N.N.
Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title_full Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title_fullStr Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title_full_unstemmed Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title_short Comparison of several methods of sires evaluation for total milk yield in a herd of Holstein cows in Yemen
title_sort comparison of several methods of sires evaluation for total milk yield in a herd of holstein cows in yemen
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629572/
https://www.ncbi.nlm.nih.gov/pubmed/26623356
work_keys_str_mv AT alsamaraifr comparisonofseveralmethodsofsiresevaluationfortotalmilkyieldinaherdofholsteincowsinyemen
AT abdulrahmanyk comparisonofseveralmethodsofsiresevaluationfortotalmilkyieldinaherdofholsteincowsinyemen
AT mohammedfa comparisonofseveralmethodsofsiresevaluationfortotalmilkyieldinaherdofholsteincowsinyemen
AT alzaidifh comparisonofseveralmethodsofsiresevaluationfortotalmilkyieldinaherdofholsteincowsinyemen
AT alanbarinn comparisonofseveralmethodsofsiresevaluationfortotalmilkyieldinaherdofholsteincowsinyemen