Estimates of genetic parameters for stayability and their associations with traits of economic interest in Gir dairy cows

Silva, R. M. O.; Boligon, Arione Augusti; Fernandes, Alexandre Rodrigo Mendes; Filho, Aníbal Eugênio Vercesi; Faro, Lenira El; Tonhati, Humberto; Albuquerque, Lúcia Galvão de; Fraga, Angelina Bossi

doi:10.4238/gmr.15016958

Cited by 4 publications

(2 citation statements)

References 14 publications

(16 reference statements)

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“…Grossi et al (2009); Buzanskas et al (2010) and Bernardes et al (2015) estimated lower AFC heritability for Nellore, Canchim and Tabapuã cattle, respectively. Moreira et al (2015) and Silva et al (2016) reported higher AFC heritability estimates, 0·2 ± 0·01 and 0·3 ± 0·06 for Nellore and Gir, respectively. These findings would predict that direct selection for AFC might result in slow improvement compared to selection for other reproductive traits such as HP.…”

Section: Discussionmentioning

confidence: 91%

Genetic analysis of visual assessment and body weight traits and their relationships with reproductive traits in Nellore cattle

Paterno

Buzanskas

Filho³

et al. 2017

J. Agric. Sci.

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SUMMARYGenetic parameters for visual assessment traits measured at 487 days of age (body structure (BS), finishing precocity (FP) and muscling (MS)), body weight at 450 days of age (W450), age at first calving (AFC), heifer pregnancy (HP) and stayability (STAY, i.e. the probability of a cow to produce at least three calves before reaching 76 months of age) were estimated in Nellore cattle, seeking to include these traits in the selection criteria for dams. The statistical models included additive genetic and residual random effects using single- and two-trait Bayesian analyses. The average heritability estimates were equal to 0·37 for BS, 0·42 for FP, 0·37 for MS and 0·48 for W450. Age at first calving had a low average heritability estimate (0·13), while HP and STAY estimates were higher (0·36 and 0·24, respectively). The genetic correlations between AFC, HP and STAY with visual assessment traits and body weight were favourable, indicating that selecting animals with higher BS, FP, MS and W450 values will result in the indirect selection of animals with lower AFC and successful scores for HP and STAY. The selection of heifers that present an early pregnancy should anticipate AFC and improve HP in the current herd. Except for AFC, the heritability and genetic correlation estimates between the studied traits justify their inclusion in the selection criteria of the Nellore breeding programme.

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Section: Discussionmentioning

confidence: 91%

Genetic analysis of visual assessment and body weight traits and their relationships with reproductive traits in Nellore cattle

Paterno

Buzanskas

Filho³

et al. 2017

J. Agric. Sci.

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“…There is a lack of studies reporting the genetic correlation between MY305 and LG in buffaloes, but some studies have reported genetic correlation estimates for these traits in dairy cattle (0.04 to 0.35; Wasana et al, 2015). Silva et al (2016) estimated a positive genetic correlation (0.61) between the permanence in the herd at 60 months and MY305 in a herd of dairy Gyr cattle, concluding that selection for MY305 could be used to improve the animals' ability to remain in the herd. Stefani et al (2018) found a negative genetic correlation (−0.25) between permanence in the herd at 60 months of age and MY305 in Holstein cattle.…”

Section: My305mentioning

confidence: 99%

Genetic parameters and association between longevity and milk production in buffaloes using the ssGBLUP method

Carvalho¹,

Lázaro²,

Stefani³

et al. 2023

Revista Brasileira De Zootecnia

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The objectives of this work were to estimate the genetic parameters for the traits longevity (LG) and accumulated milk yield at 305 days (MY305) using a bitrait animal model and the single-step GBLUP method and estimate the genetic gain for LG through direct and indirect selection for MY305. We used 4,057 records of first lactations of Murrah dairy buffaloes, collected between 1987 and 2020, belonging to six Brazilian herds located in the states Ceará, Rio Grande do Norte, and São Paulo and 960 animals genotyped using the 90K Axiom Buffalo Genotyping (Thermo Fisher Scientific, Santa Clara, CA) to estimate the genetic parameters. The heritability estimate was 0.25 for MY305 and 0.13 for LG. The genetic gain for LG was 0.13 months under direct selection, and 0.14 months under indirect selection, which results in a relative selection efficiency of 11% under selection for MY305 compared with the direct selection. The genetic correlation between the two traits was 0.77, indicating that animals with genetic potential for high MY305 tend to live longer. The genetic trends for MY305 and LG were 0.22 kg/year and 5.20 days/year, respectively, indicating a positive response, which reaffirms its relationship with the high genetic correlation between the two traits.

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Genetic parameters for body weight and milk production of dairy Gyr herds

Hortolani

Bernardes

Filho

et al. 2022

Trop Anim Health Prod

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Estimates of genetic parameters for stayability and their associations with traits of economic interest in Gir dairy cows

Cited by 4 publications

References 14 publications

Genetic analysis of visual assessment and body weight traits and their relationships with reproductive traits in Nellore cattle

Genetic analysis of visual assessment and body weight traits and their relationships with reproductive traits in Nellore cattle

Genetic parameters and association between longevity and milk production in buffaloes using the ssGBLUP method

Genetic parameters for body weight and milk production of dairy Gyr herds

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