Pedigree analysis of Cashmere goat breed of South Khorasan

Joezy-Shekalgorabi, Sahereh; Maghsoudi, Ali; Taheri-Yeganeh, Amir; Rajabi-Marand, Behzad

doi:10.1080/1828051x.2016.1221748

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Tomar et al ( 41 ) reported that the generation interval was 2.04 years for Beetal goats. Similar results were observed in other breeds of goats ( 34 , 35 , 42 ). The generation length is ~4 years for most goats.…”

Section: Discussionsupporting

confidence: 90%

“…A small fraction of high inbreeding individuals may be caused by natural mating or poor management. The average inbreeding value in the entire studied population was 4.50%, which is lower than that in the cashmere goat breed of the South Khorasan and Iranian Adani goat breeds reported by Joezy-Shekalgorabi et al ( 34 , 35 ). However, Illa et al ( 14 ) reported that the average inbreeding coefficient in Nellore sheep was 3.32%, which was lower than that in the IMCG population.…”

Section: Discussioncontrasting

confidence: 58%

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Assessing Genetic Diversity and Estimating the Inbreeding Effect on Economic Traits of Inner Mongolia White Cashmere Goats Through Pedigree Analysis

et al. 2021

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Objective: The purpose of this study was to discover the population structure and genetic diversity of Inner Mongolia White Cashmere goats (IMCGs) and demonstrate the effect of inbreeding on the live body weight (LBW), cashmere yield (CY), fiber length (FL), and fiber diameter (FD) of IMCGs.Materials and Methods: All data were collected from pedigree information and production performance records of IMCGs from 1983 to 2019. The population structure and genetic diversity were analyzed by Endog 4.8 software. Inbreeding coefficients were obtained by the pedigree package in R. Then, a linear regression model was used to analyze how inbreeding influences economic traits in IMCGs. Four levels of inbreeding coefficients (Fi) were classified in this study, including Fi = 0, 0< Fi ≤ 6.25, 6.25< Fi ≤ 12.5 and Fi≥12.5. Variance analysis was performed to determine whether inbreeding levels had a significant effect on economic traits in IMCGs.Results: The proportions of rams and dams in IMCGs for breeding were relatively small, with values of 0.8 and 20.5%, respectively. The proportion of inbred animals in the entire population was high, with values up to 68.6%; however, the average inbreeding coefficient and relatedness coefficient were 4.50 and 8.48%, respectively. To date, the population has experienced 12 generations. The average generation interval obtained in the present study was 4.11 ± 0.01 years. The ram-to-son pathway was lowest (3.97 years), and the ewe-to-daughter pathway was highest (4.24 years). It was discovered that the LBW, CY, and FL increased by 3.88 kg, 208.7 g, and 1.151 cm, respectively, with every 1% increase in the inbreeding coefficient, and the FD decreased by 0.819 μm with every 1% increase in the inbreeding coefficient. Additionally, multiple comparison analysis indicated that when the inbreeding coefficient was higher than 6.25%, the LBW showed an obvious decreasing trend. The threshold value of inbreeding depression in the CY is 12.5%. However, inbreeding depression has not been observed in the FL and FD.Conclusion: Pedigree completeness needs to be further strengthened. The degree of inbreeding in this flock should be properly controlled when designing breeding programs.

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Section: Discussionsupporting

confidence: 90%

Section: Discussioncontrasting

confidence: 58%

Assessing Genetic Diversity and Estimating the Inbreeding Effect on Economic Traits of Inner Mongolia White Cashmere Goats Through Pedigree Analysis

et al. 2021

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“…This could be attributed to the fact that Galla goats tend to have a rapid growth rate as compared to SEA goats which makes them be bred at a younger age. Similar values were reported by 29 , 30 for South Khorasan Cashmere and Creole Goats in America, however, a higher generation interval of 5.28 years was reported by 31 in Brazilian Marota goats. Lower figures for the generation interval of 3.3, 2.77, and 3.3 years were reported by 3 , 10 , 28 in Jamunapari, Spanish Murciano-Granadina and Markhoz goats.…”

Section: Discussionsupporting

confidence: 85%

Assessing the population structure and genetic variability of Kenyan native goats under extensive production system

Kichamu,

Wanjala,

Cziszter

et al. 2024

Sci Rep

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Indigenous goats are important to many livelihoods. Despite this, they are subjected to indiscriminate crossbreeding. This affects their genetic variability which is needed to survive in current regime of climate change. The study assessed population structure and genetic diversity of Galla and Small East African goats (SEA) using pedigree information. A total of 7384 animals, 5222 of the Galla and 2162 of the SEA breeds, born between the years 1983 and 2022, were utilized. Individuals with known parents were defined as reference population. From the results, the maximum generation traced for Galla and SEA populations was 14.6 and 14.5, respectively. However, only 6 and 5 generations for Galla and SEA were complete. Pedigree completeness increased with the increasing number of generations. The average generation interval (GI) for Galla and SEA was 3.84 ± 0.04 and 4.4 ± 0.13 years. The average increase in the rate of inbreeding per generation for Galla and SEA was 0.04 and 0.05, with the effective ancestors and founders (fa/fe) ratio being same (1.00) for both breeds. Fifty percent (50%) of the genetic variability in the populations was contributed by 3 and 1 ancestor for Galla SEA, respectively. The effective population size (Ne) was 5.19 and 4.77 for Galla and SEA. Therefore, the current breeding programs should be changed to avoid future genetic bottlenecks in this population. These findings offer an opportunity to enhance the current genetic status and management of Kenyan native goats and other regions with similar production systems.

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Genetic diversity and population structure of Jamunapari goat in India using pedigree analysis

Mandal

Baneh

Roy³

et al. 2021

Trop Anim Health Prod

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Pedigree analysis of Cashmere goat breed of South Khorasan

Cited by 7 publications

References 13 publications

Assessing Genetic Diversity and Estimating the Inbreeding Effect on Economic Traits of Inner Mongolia White Cashmere Goats Through Pedigree Analysis

Assessing Genetic Diversity and Estimating the Inbreeding Effect on Economic Traits of Inner Mongolia White Cashmere Goats Through Pedigree Analysis

Assessing the population structure and genetic variability of Kenyan native goats under extensive production system

Genetic diversity and population structure of Jamunapari goat in India using pedigree analysis

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