Phenotypic and Genetic Trends for Some Milk Yield Traits of Egyptian Buffaloes

El-Arian, M.; Shalaby, N.; Khattab, A. S.; Darwish, S.; Abou-Gamous, R.

doi:10.21608/jappmu.2012.82938

Cited by 6 publications

(14 citation statements)

References 7 publications

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“…The alike phenotypic trend for FDO was non-significant, but positive, which is not desirable. Similarly, noticed by El-Arian et al (2012) for MY, LP and DO in Friesian cows. In Egyptian buffaloes, Fooda et al (2010) obtained the annual phenotypic trend for milk yield was 26 kg being in all Mahallet Mousa farms.…”

Section: Resultssupporting

confidence: 74%

“…Fooda et al (2010) found the annual genetic trends for milk yield in all Mahallet Mousa farms were positive and being 0.58 kg in Egyptian buffaloes. El-Arian et al (2012) obtained that the annual genetic change for TMY and LP was positive and being 3.70kg and 0.55d, respectively as the regression coefficient of sire breeding values per year in Egyptian buffaloes. Annual phenotypic trends for studied traits in Egyptian buffaloes are illustrated in Table 6.…”

Section: Resultsmentioning

confidence: 96%

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Direct and Maternal Genetic Trends for Some Productive and Reproductive Traits in Egyptian Buffaloes

Naser

2020

JITV

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This study was done to determine the direct and maternal genetic and phenotypic trends for productive traits such as first lactation milk yield (FLMY, kg), first lactation period (FLP, d) and first lactation daily milk (FLDM, kg), and reproductive traits such as age at first calving (AFC, mo), First days open (FDO, d) and first calving interval (FCI, d). Data were collected over consecutive 25 years (1991 to 2015) of 1104 first lactation of 135 sires and 482 dams maintained at Mahallet Mousa farms of Animal Production Research Institute. Data were analyzed by Animal model to determine genetic parameters for studied traits. Means of FLMY, FLP, FLDM, AFC, FDO and FCI were 1546.5kg, 189d, 7.9kg, 37.9mo, 120.8d and 428d, respectively. The direct heritability (h2a) for same traits were 0.25, 0.18, 0.24, 0.45, 0.18 and 0.19, respectively. Corresponding maternal heritability (h2m) for mentioned traits was 0.12, 0.19, 0.22, 0.25, 0.12 and 0.12, respectively. Genetic correlations (rg) among studied traits were varied between -0.19 to 0.38. Accuracy of predicted breeding value varied between 69 to 94, 0.37 to 94 and 42 to 91% for FLMY, FLP, FLDM, AFC, FDO and FCI of sires, cows and dams, respectively that revealed the genetic improvement could be actualized through each of cows or sires or dams. Additive and maternal genetic, permanent environmental and phenotypic trends were not significant for all studied traits. It indicated that it is important to set up a plan to improve genetic and environmental conditions thus, increasing productivity and realization of high profitability.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 96%

Direct and Maternal Genetic Trends for Some Productive and Reproductive Traits in Egyptian Buffaloes

Naser

2020

JITV

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“…The obtained results were in the same line of those obtained by (Thevamanoharan et al, 2002), (Mourad and Khattab, 2009), (El-Bramony, 2011), (Malhado et al, 2013) and (El-Bramony, 2014). On the contrary to the present findings (Kawthar et al, 2005), (EL-Arian et al, 2012) and (Ibrahim et al, 2012) showed high heritability for days in milk and milk yield. Moderate heritability estimate was 0.18 and 0.19 for days open and calving interval, respectively.…”

Section: Discussioncontrasting

confidence: 99%

“…High positive genetic correlation between total milk yield with each of days in milk (0.73) and 305day milk yield (0.86). Similar to present results (Mourad and Khattab, 2009), (Ibrahim et al, 2012), (EL-Arian et al, 2012) and (Shalaby et al, 2013) recorded that high positive genetic correlation between days in milk and milk yield. The opposite results obtained by (Barros et al, 2016) reported that low negative correlation between days in milk and milk yield.…”

Section: Discussionsupporting

confidence: 91%

“…While the corresponding values for dams were between -160 and 180 and between -230 and 170 kg, respectively. The opposite results obtained by (Cady et al, 1983) who found that expected breeding values for sires of Nili-Ravi Buffaloes for 250 to 305day milk yield averaged from -172 kg to +260, (EL-Arian et al, 2012), (Ismail, 2006), (Fooda et al, 2011) who showed that breeding value estimates for total milk yield was ranged between +101 to -269kg for Egyptian buffaloes.…”

Section: Discussionmentioning

confidence: 92%

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Detection of SNPs in Exon10 Locus of FSHR Gene and Their Association with Some Infertility problems in Egyptian Buffaloes

ShafiK

Kh.

Abo-Salem

et al. 2017

Benha Veterinary Medical Journal

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Follicle-stimulating hormone (FSH) is a glycoprotein hormone. It helps in development and maturation of the follicles in females through binding to FSH receptors which consists of 10 exons and 9 introns. The objective of this study was to estimate some genetic factors affecting milk production and fertility traits and to detect polymorphisms in exon 10 of FSHR gene and determine the associations between these polymorphisms and infertility in Egyptian buffalo. Heritability estimates were (0.19, 0.18, 0.07, 0.10, 0.21 and 0.19) for calving interval, days open, dry period, days in milk, total milk yield and 305day milk yield (305 DMY), respectively. Dry period showed high positive phenotypic and genetic correlation with day's open and calving interval. The breeding value for 305 DMY ranged from-480 to 380, from-370 to 330 and between-230 to 170 kg for cow, sire and dam, respectively. There was one non synonymous SNP (A93G) at 93bp in exon 10 of FSHR gene (with 230bp size) and there was two different pattern of single strand conformation polymorphism (SSCP) but there was no any SNP for FSHR gene (with 306bp size) in all examined Egyptian buffaloes as shown by one SSCP pattern and nucleotide sequencing.

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Genetic parameters of production and reproduction traits of Egyptian buffaloes under subtropical conditions

Easa

El-Aziz

Barbary

et al. 2022

Trop Anim Health Prod

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This research was aimed to investigate the production and reproduction traits and their genetic parameters of Egyptian buffaloes under subtropical environment. Heritability, phenotypic, and genetic parameters were estimated for productive and reproduction traits of first parity This study revealed the averages TMY, 305-dMY, LL, BW, DP, SP, CI, and AFC were 2260, 2150 kg, 271 days, 38.63 kg, 210.50 days, 195.20 days, 586.86 days, and 36.61 months, respectively. The heritability estimates for productive traits of the first lactation were 0.61, 0.52, 0.47, 0.20, and 0.23 for TMY, 305-dMY, LL, DP, and BW, respectively. Heritability estimates for reproductive traits SP, CI, and AFC were 0.07, 0.09, and 0.35, respectively. Genetic correlations of most of the investigated first parity traits were positive, with an exception of DP. The genetic correlation was negative between SP and BW, and between AFC and LL. Phenotypic correlations of the first parity among all investigated traits were positive except between DP and TMY, 305-dMY, LL, BW, and AFC. High and moderate heritability estimates indicated that the opportunity of genetic upgrading of these parameters could be achieved owing to sire selection. Selection for high milk yield will be associated with genetic improvement in lactation period and birth weight.

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Phenotypic and Genetic Trends for Some Milk Yield Traits of Egyptian Buffaloes

Cited by 6 publications

References 7 publications

Direct and Maternal Genetic Trends for Some Productive and Reproductive Traits in Egyptian Buffaloes

Direct and Maternal Genetic Trends for Some Productive and Reproductive Traits in Egyptian Buffaloes

Detection of SNPs in Exon10 Locus of FSHR Gene and Their Association with Some Infertility problems in Egyptian Buffaloes

Genetic parameters of production and reproduction traits of Egyptian buffaloes under subtropical conditions

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