Relationship between inbreeding and milk production traits in two Italian dairy sheep breeds

Cesarani, Alberto; Mastrangelo, Salvatore; Congiu, Michele; Portolano, Baldassare; Gaspa, Giustino; Tolone, Marco; Macciotta, N.P.P.

doi:10.1111/jbg.12741

Cited by 3 publications

(3 citation statements)

References 95 publications

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“…The average value of the inbreeding coefficient in our study is 3.64%, which is within the range of average values compared to other populations. Although this coefficient is much higher than for extensively bred breeds (Kiya et al, 2019), it also reaches much lower values than for intensively bred breeds (Cesarani et al, 2023). It is true that the above-mentioned values of the inbreeding coefficient result in great variability between populations, which is also due to different mating management and different ways of using studs in herds.…”

Section: Discussionmentioning

confidence: 91%

“…In contrast, for the Morada Nova breed, the authors report an average value of 2.88 % (Matos and Lôbo, 2021). Another study on two breeds in Italy found a large variation in the inbreeding coefficient in different sheep populations, with one breed having an inbreeding value of 5.3 % and the other having an inbreeding value of 15.3 % (Cesarani et al, 2023). An inbreeding analysis of three meat breeds in Denmark showed variability in the inbreeding coefficient ranging from 1.2 % to 2.6 %, with an intergenerational increase in inbreeding of around 1 % (Norberg and Sorensen, 2007).…”

Section: Discussionmentioning

confidence: 93%

“…The value of the inbreeding coefficient is another important factor influencing sheep meat productivity. It has negative effects on both milk yield (Cesarani et al, 2023) and meat yield (Kiya et al, 2019). Inbreeding has also been shown to have a negative effect on milk yield in goats, with a 1 % increase in the inbreeding coefficient resulting in a 2.31 kg decrease in milk yield per lactation (Paiva et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Inbreeding in the Zwartbles breed population and its influence on meat production in the Czech Republic

Filipčík,

Falta,

Sokolová

et al. 2023

Arch. Anim. Breed.

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Abstract. The aim of this study was to estimate the inbreeding coefficient in the Zwartbles sheep population in the Czech Republic, as well as to investigate the effect of inbreeding on meat yield indicators. The analysis used data on the entire population since 1997, with the original database containing 13 150 animals. In this population, the average inbreeding coefficient is 3.64 %. There is a significant increase in inbreeding – from zero values to more than 4 % between 1997 and 2021. The effect of inbreeding on the weight of the animals at 100 d of age, the weight at bonitation prior to breeding, the thickness of the musculus longissimus dorsi (MLD), the thickness of the subcutaneous back fat, and the fleshiness of the animals were all evaluated. The value of the inbreeding coefficient had a statistically significant effect on weight at 100 d, MLD thickness, and back fat thickness. A negative relationship between inbreeding and all of these parameters was found when the inbreeding coefficient was increased by 1 %, resulting in a 60.2 g weight reduction at 100 d, 0.06 mm reduction in MLD thickness, and 0.013 mm reduction in back fat thickness.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inbreeding in the Zwartbles breed population and its influence on meat production in the Czech Republic

Filipčík,

Falta,

Sokolová

et al. 2023

Arch. Anim. Breed.

View full text Add to dashboard Cite

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Relationship between inbreeding and milk production traits in two Italian dairy sheep breeds

Cesarani

Mastrangelo

Congiu

et al. 2022

J Animal Breeding Genetics

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The effects of inbreeding in livestock species breeds have been well documented and they have a negative impact on profitability. The objective of this study was to evaluate the levels of inbreeding in Sarda (SAR, n = 785) and Valle del Belice (VdB, n = 473) dairy sheep breeds and their impact on milk production traits.Two inbreeding coefficients (F) were estimated: using pedigree (F PED ), or runs of homozygosity (ROH; F ROH ) at different minimum ROH lengths and different ROH classes. After the quality control, 38,779 single nucleotide polymorphisms remained for further analyses. A mixed-linear model was used to evaluate the impact of inbreeding coefficients on production traits within each breed. VdB showed higher inbreeding coefficients compared to SAR, with both breeds showing lower estimates as the minimum ROH length increased. Significant inbreeding depression was found only for milk yield, with a loss of around 7 g/day (for SAR) and 9 g/day (VdB) for a 1% increase of F ROH . The present study confirms how the use of genomic information can be used to manage intra-breed diversity and to calculate the effects of inbreeding on phenotypic traits.

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Age Changes in the Body Weight of Ram Lambs Obtained From Ewes of Different Body Types

Kitaeva,

Bezaltychna,

Novichkova

2024

STBIAS

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The research was carried out in the production conditions of the private farm “AGRO-DIS” of the Podilsky district of the Odesa oblast with the population of crossbred F1 rams, obtained from the industrial crossing of ewes of the Askaniysky meat-wool breed with crossbred wool of the Odesa inbred type of different body types with Merinolandschaf rams. Changes in body weight of ram lambs from birth to 18 months old were studied according to generally accepted methods. It was established that the type of birth – singles or twins – affects the body weight of crossbred lambs. So, at birth, single lambs, offspring of ewes with a strong body type, had the largest body weight compared to peers of other body types. Their advantage compared to peers obtained from ewes of a slender body type was 1.3 kg or 26.42% (Р>0.999), and compared to rams of a corpulent body type, it was 0.59 kg or 10.48% (Р>0, 95). However, in later age periods of growth, peers of the corpulent body type dominated in terms of body weight. Crossbred rams (AMO x ME) in all age periods of growth had a high body weight regardless of the type of birth and the body type of the ewes. The difference in body weight of single rams, offspring from ewes of strong and corpulent body type was greater in favor of rams obtained from ewes of corpulent body type with a high degree of probability and amounted to: in 4 months. – 11.54 kg or 26.58% (Р>0.999), 8 months. – 9.29 kg or 18.8% (Р>0.999), 12 months. –14.26 kg or 23.2% (Р>0.999), 16 months. – 10.39 kg or 14.35% (Р>0.999), 18 months. – 11.15 kg or 13.93% (Р>0.999). Offspring born by ewes with a corpulent body type also prevailed over peers obtained from ewes of a slender body type at all age periods of growth. The obtained results of research indicate the expediency of industrial crossbreeding at farms with the aim of increasing the meat productivity of sheep.

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Relationship between inbreeding and milk production traits in two Italian dairy sheep breeds

Cited by 3 publications

References 95 publications

Inbreeding in the Zwartbles breed population and its influence on meat production in the Czech Republic

Inbreeding in the Zwartbles breed population and its influence on meat production in the Czech Republic

Relationship between inbreeding and milk production traits in two Italian dairy sheep breeds

Age Changes in the Body Weight of Ram Lambs Obtained From Ewes of Different Body Types

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