Elucidating genetic diversity and population structure of Alpine x Beetal goats using pedigree analysis

Sahoo, Shweta; Alex, Rani; Vohra, Vikas; Mukherjee, Sabyasachi; Gowane, G. R.

doi:10.1016/j.smallrumres.2023.107060

Cited by 5 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The climate is subtropical. The temperature of this farm ranges from 0 to 45°C and annual rainfall ranges from 760 to 960 mm (Sahoo et al, 2023a;Upadhyay et al, 2024a).…”

Section: Location Of the Farmmentioning

confidence: 99%

Assessing genetic parameters for first parity reproductive traits for early selection in Saanen × Beetal goats of India

Sahoo,

Alex,

Vohra

et al. 2024

Reprod Domestic Animals

Self Cite

View full text Add to dashboard Cite

The present study aimed to evaluate the genetic parameters of first parity reproductive traits. Information on 762 reproductive records on Saanen × Beetal (S × B) goats reared for approximately five decades was collected from ICAR‐National Dairy Research Institute, Karnal, Haryana (1973–2020). For genetic analysis, single‐trait and multiple‐trait animal models were used. Gibbs sampler for animal model (GSAM) approach was used for estimating (co)variance components of reproductive traits. Six different single‐trait animal models (with or without maternal and environmental effects) were used and the deviance information criterion (DIC) determined the best model. The least squares mean for age at first service (AFS), age at first kidding (AFK), service period (SP), dry period (DP), gestation length (GL), kidding interval (KI), litter weight (LW), number of kids born (NKB) and number of female kids born (NFKB) in first parity were 526.99 ± 4.86, 662.96 ± 5.03, 219.11 ± 6.25, 109.38 ± 6.00, 150.48 ± 0.27, 356.63 ± 4.80 days, 3.87 ± 0.05 kg, 1.27 ± 0.02 and 0.67 ± 0.03, respectively. Lower heritability estimates for these reproductive traits revealed a sparse scope for genetic improvement. Multivariate analysis using Model 1 was carried out to evaluate the genetic and phenotypic correlation of these nine reproductive traits. The genetic correlation of DP and SP was negatively with LW, NKB and NFKB, which is favourable as reduction in SP and DP can improve these economically important traits through indirect selection. Consistent efforts towards genetic improvement of these goat flock poses a promising future for meat industry owing to high prolificacy and good reproductive potential in this flock.

show abstract

“…The climate is subtropical. The temperature of this farm ranges from 0 to 45°C and annual rainfall ranges from 760 to 960 mm (Sahoo et al, 2023a;Upadhyay et al, 2024a).…”

Section: Location Of the Farmmentioning

confidence: 99%

Assessing genetic parameters for first parity reproductive traits for early selection in Saanen × Beetal goats of India

Sahoo,

Alex,

Vohra

et al. 2024

Reprod Domestic Animals

Self Cite

View full text Add to dashboard Cite

show abstract

“…The present flock of Alpine × Beetal has an average 4.77% overall inbreeding and effective population size of 51.39 (Sahoo et al., 2023a). The Alpine × Beetal goats at NDRI are prolific with average overall prolificacy of 32% and are adapted to Karnal's tropical climate (Sahoo et al., 2023b). However, the success of crossbreeding programmes in goats is contingent upon various factors, including the selection of breeding individuals.…”

Section: Introductionmentioning

confidence: 99%

“…The detailed study on reproductive performance of the Alpine × Beetal goats was carried out by Sahoo et al. (2023b), however the milk production and reproductive efficiency, its genetic variance and selection strategy for futuristic breeding has not yet been defined.…”

Section: Introductionmentioning

confidence: 99%

Optimizing selection strategy for enhancing reproduction efficiency in Indian crossbred goats using milk productivity as a selection criterion

Upadhyay,

Alex,

Sahoo

et al. 2023

Reprod Domestic Animals

Self Cite

View full text Add to dashboard Cite

The present study was aimed at optimizing the selection strategy for enhancing reproductive efficiency and milk productivity of Alpine × Beetal crossbred goats. The data set included 2949 milk trait records across parities and 1389 milk records from first parity and corresponding reproductive traits. The traits included for analysis were 150‐day milk yield (150DMY), days in milk (DIM), peak yield (PY) and total milk yield (TMY). The litter size (LS) and litter weight (LW) were used for specifically formulating selection plan using indirect selection. The least squares mean for lactation traits during the first parity were 150DMY: 195.32 ± 2.09 kg, DIM: 236.42 ± 3.04 days, PY: 1.82 ± 0.02 kg, TMY: 269.62 ± 4.52 kg. Notably, Alpine × Beetal goats demonstrated genetic superiority pan India for milk productivity as compared to other native goat breeds. The least squares mean for 150DMY across all parities was 236 ± 3.13 kg. An animal model employing average information restricted maximum likelihood was used for (co)variance component estimation to get the genetic parameters. The analysis revealed total heritability estimates for 150DMY, DIM, PY and TMY as 0.18 ± 0.06, 0.04 ± 0.04, 0.12 ± 0.06 and 0.08 ± 0.05, respectively. Repeatability estimates for 150DMY, DIM, and TMY were 0.28 ± 0.04, 0.21 ± 0.03 and 0.37 ± 0.03, respectively. Bivariate analysis of 150DMY with reproductive traits revealed heritability for LS and LW as 0.05 ± 0.01 and 0.10 ± 0.01, respectively using Gibbs sampling. Strong and positive genetic correlations of 150DMY with other production and reproduction traits was observed, such as DIM (0.72), PY (0.98), TMY (0.88), LS (0.57) and LW (0.33). Moderate heritability and repeatability estimate of 150DMY, along with its positive correlation with production and reproductive traits suggested it as a suitable selection criterion for early selection and overall genetic progress of lactation traits. The genetic trend analysis showed an overall improvement in all these traits, with observed gain of 98.4 g per year for 150DMY, 0.04 days per year for DIM, 0.5 g per year for PY and 220.5 g per year for TMY. We observed that selecting based on 150DMY would lead to a favourable indirect improvement for LW as 79 g and LS 0.04 units per generation. We, therefore, recommend employing 150DMY as the single trait selection criteria to enhance both milk productivity and reproductive potential of Alpine × Beetal goats.

show abstract

Explicating the genetic diversity and population structure of Saanen × Beetal goats using pedigree analysis

Sahoo,

Alex,

Vohra

et al. 2023

Trop Anim Health Prod

Self Cite

View full text Add to dashboard Cite

Pedigree analysis is required to assess the genetic diversity and population structure of a close breeding population in order to effectively manage the breeding program and keep inbreeding under acceptable limits. Saanen x Beetal is a crossbred population of goats, reared at National Dairy Research Institute (NDRI) Karnal for the last ve decades. This germplasm has been acclimated to a tropical climate and has a higher milk potential and proli cacy. Objective of this study was to elucidate the genetic diversity, population structure, and inbreeding in the ock of the Saanen x Beetal goats. The data were collected from the Animal Genetics and Breeding Division of ICAR-NDRI, Karnal for 2603 animals from the year 1971-2021. Animals born between 2014-2017 were considered as a reference cohort. Results revealed that the average generation interval was 3.44 years for the complete pedigree. The average inbreeding coe cient and the average relatedness were 4.20% and 6.87%, respectively, for the complete pedigree and 10.78% and 10.80%, for the reference population. Higher inbreeding coe cient and average relatedness in the reference cohort demonstrated impact of enclosed gene pool and demands immediate intervention for managing diversity in the closed nucleus under study. Ancestors contributing 50% of the gene pool were 8 and 3 for the complete pedigree and reference cohort, respectively, which illustrates the fact that very few ancestors were responsible for genetic diversity in the ock, which results in the decline of effective population size. Effective number of founders (f e ), ancestors (f a ), and founder genome equivalents (f g ) were 15, 7, and 3.11, respectively. The (f e /f a ) ratio in the reference population was 2.14 indicating the occurrence of the bottleneck effect in the ock. We observed that inbreeding was non-signi cant for all reproductive traits except for age at rst service and age at rst kidding. To lessen inbreeding and augment genetic diversity in the ock, the strati ed breeding plan needs to be followed, where, mate sele ction would be based on relatedness. Furthermore, introduction of unrelated Saanen and Beetal crosses will help alleviate the inbreeding accumulation.

show abstract

Elucidating genetic diversity and population structure of Alpine x Beetal goats using pedigree analysis

Cited by 5 publications

References 33 publications

Assessing genetic parameters for first parity reproductive traits for early selection in Saanen × Beetal goats of India

Assessing genetic parameters for first parity reproductive traits for early selection in Saanen × Beetal goats of India

Optimizing selection strategy for enhancing reproduction efficiency in Indian crossbred goats using milk productivity as a selection criterion

Explicating the genetic diversity and population structure of Saanen × Beetal goats using pedigree analysis

Contact Info

Product

Resources

About