Multi-trait and multi-source selection indices for milk production and reproductive traits in a herd of Holstein cattle in Egypt

Faid-Allah, Eslam

doi:10.14334/jitv.v20i3.1182

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The genetic correlation between LL and each of ( LNC and DO ) were positive and high 0.41 and 0.64 respectively, while it was negative -0.28 between LL and CI. This is in close agreement with the genetic correlation between LL and DO found to be positive 0.882±0.035 in Egypt by Faid-Allah (2015). This is comparable and positive for the genetic correlation between LL and DO in Ethiopian Holstein by Ayalew et al,( 2017).…”

Section: Genetic Correlationsupporting

confidence: 90%

“…This result accords with Phenotypic correlation between LL with DO reported by Ayalew et al, (2017). However, a higher and positive Phenotypic correlation between LL with DO of 0.89 was reported for the same breed in Egypt by Faid-Allah, (2015). While the Phenotypic correlation between LL and CI it was positive and relatively higher 0.78±0.084 for Simmental Cattle in Turkey by Ulutas and Sezer, (2009) .…”

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confidence: 85%

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Genetic Assessment for some Productive and Fertility Traits Using Maximum Likelihood (REML) Of Friesian Cows in Egypt

Ebrahim¹

2019

Journal of Animal and Poultry Production

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This study aimed to evaluate the genetic improvement program of the Friesian cows. SAS program was used to calculate averages and significant effect, and (REML) program was used to estimate genetic parameters for productive traits lifetime milk yield (LTMY), daily milk yield (DMY), Lactation Length (LL) and Lactation number complete (LNC), and fertility traits days open (DO) and calving interval (CI). The least square means of LTMY, DMY, LL, LNC, DO and CI were 17546 (Kg), 12(Kg), 304 (d), 3.5 (lactations), 78 (d) and 379(d), respectively. The effect of the month, year of calving and age at first calving (AFC) were significant for all the traits except, the farm was non-significant to DMY. Estimates of the heritability (h2a) were 0.09, 0.44, 0.24 and 0.34 for LTMY, DMY, LL and LNC, respectively, whereas 0.13 and 0.17 for DO and CI, respectively. High h2a of productivity traits, particularly DMY, emphasized the possibility of achieving a significant rate of genetic improvement in this trait through selection program. The genetic correlations were positive ranging from 0.02 to 0.76 , except CI with (DMY, LL and LNC) were negative and ranging from-0.07 to-0.76. The highest genetic and phenotypic correlation between DMY and LTMY. The low genetic value of these fertility traits reflected the lack of patients' genetic advancement for these traits while, phenotypic correlation estimates were positive except reproductive traits with some productive traits. Repeatability estimates are few and close to the heritability value due to the small presence of permanent environmental variation, confirming the unpredictability of the cow from its current records of fertility traits.

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Section: Genetic Correlationsupporting

confidence: 90%

supporting

confidence: 85%

Genetic Assessment for some Productive and Fertility Traits Using Maximum Likelihood (REML) Of Friesian Cows in Egypt

Ebrahim¹

2019

Journal of Animal and Poultry Production

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“…The h 2 estimate of DO (0.08, Table 1) was within the range of 0.03 to 0.12 as reported in literature (Guo et al 2014;Yamazaki et al 2014;Faid-Allah 2015;Ben Zaabza et al 2016;Radwan and Abo Elfadl 2016;Ayalew et al 2017;Salimi et al 2017) and lower than the values of 0.15 and 0.18 as reported by Radwan and Abo Elfadl (2016) and Salem and Hammoud (2016a), respectively. Heritability of CI (0.06, Table 1) was slightly lower than the estimates of 0.09 and 0.11 as reported by Zambrano and Echeverri (2014) and Ayalew et al (2017), respectively and within the range of 0.002 to 0.07 as stated in other previous reports (El-Bayoumi 2015;Ben Zaabza et al 2016;Salimi et al 2017).…”

Section: Heritabilitiessupporting

confidence: 76%

Restricted Selection Index to Relieve the Negative Repercussion in Reproductive Performance of Holstein Cows

2021

Int J Vet Sci

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The aim of this investigation was to develop restricted selection index aiming to improve 305-day yields of milk (MY), fat (FY) and protein (PY), while keeping the deterioration in days open (DO), calving interval (CI) and number of services per conception (NSPC) at minimum levels in Holstein cows. The data represent 3682 records of 1122 cows, daughters of 95 sires and 712 dams. The data were analyzed by multi-trait animal model with repeated measures. Eight selection indexes (five unrestricted and three restricted) were derived using MY, FY, PY, CI, DO and NSPC in various combinations as sources of information in the indexes. However, the true breeding value included MY, FY and PY. The highest accuracy of selection (0.60) resulted from selection based on the full index. Milk yield and SPC appeared to be the most valuable traits in the full index. Combining the two traits into one index (the best reduced index) gave 0.57 accuracy of selection. The index based on MY alone (the most accurate single trait index) gave 0.53 accuracy. It seems possible to reduce the expected genetic deterioration in the reproductive traits by restricting the full index to result in zero genetic change in NSPC (rTI=0.48). This restriction will allow the breeder to mitigate the deterioration in DO and CI by 12 and 16 days respectively, by sacrificing with part of the expected genetic improvement in productive traits (29, 40 and 48% in MY, FY and PY, respectively).

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“…Regarding average 305 days milk yield (days MY), results were 2781.08±551.26 L which are higher than reported values of different researchers. Average values of MY-305 days reported by Mohiuddin et al (1991), Chaudary et al (1994), Dahlin et al (1998), Aslam et al (2002), Rehman et al (2008), Hassan and Khan (2013) were found to be 1603±12.3, 2729.0±669.3, 1363±30.1, 1864.5±77.1, 1393±11.7 and 1613±49.03 L. The results of Nawaz et al (1993) and Faid-Allah (2015) were 2889±92 and 6384.95±1236.9 L, which were considerably higher than current values.…”

Section: O N L I N E F I R S T a R T I C L Ementioning

confidence: 83%

Evaluation of Lactation and Performance of Friesian Cow in Local Environment of Quetta, Balochistan, Pakistan

Khalil¹

2022

PJZ

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The present study was conducted in order to analyze lactation performance of Friesian cattle in the local environment of Quetta, Pakistan and to evaluate non-genetic factors affecting the lactation traits. For this purpose, data on lactation performance of Holstein Friesian cows were collected from government livestock farms located at Quetta. Data obtained on calving from 608 cows during last sixteen years (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) were analyzed. After editing the data for consistency and errors it was subjected to statistical analysis using fixed effect models. Independent variables were year of birth, season of birth, year of calving, season of calving and parity. Age of animal (linear and quadratic effects) and lactation period were fitted as co-variables. Dependent variables were lactation performance traits (lactation milk yield, dry period, etc.). The results of all traits showed that the year of calving had a highly significant (p<0.01) effect on lactation length, month of calving and parity. Lactation milk yield was significantly affected by year of calving (p<0.01) and month of calving (p<0.05) while parity had a non-significant (p˃0.05) effect. Milk yield over 305 days was significantly (p<0.05) affected by year and month of calving, while parity had a non-significant (p˃0.05) effect. Similarly, year of calving and month of calving had a highly significant (p<0.01) effect on dry period which is non-significantly (p˃0.05) affected by parity.

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Multi-trait and multi-source selection indices for milk production and reproductive traits in a herd of Holstein cattle in Egypt

Cited by 10 publications

References 22 publications

Genetic Assessment for some Productive and Fertility Traits Using Maximum Likelihood (REML) Of Friesian Cows in Egypt

Genetic Assessment for some Productive and Fertility Traits Using Maximum Likelihood (REML) Of Friesian Cows in Egypt

Restricted Selection Index to Relieve the Negative Repercussion in Reproductive Performance of Holstein Cows

Evaluation of Lactation and Performance of Friesian Cow in Local Environment of Quetta, Balochistan, Pakistan

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