Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

Koketsu, Yuzo; Tani, Satomi; Iida, Ryosuke

doi:10.1186/s40813-016-0049-7

Cited by 196 publications

(193 citation statements)

References 51 publications

(82 reference statements)

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“…Though the superiority of natural mating in both studies is vivid and indeed, this study found a higher litter size (12.47) than that of the Indian study, which was also done at a private farm. Low parity females especially pregnant gilts and primiparous sows have also been reported elsewhere to have lower reproductive performance than sows in parities between second and fifth parity (Koketsu et al, 2017). Sow fertility is also closely associated with varying doses of semen volume and spermatozoa count for AI (Apic et al, 2015).…”

Section: Discussionmentioning

confidence: 89%

Success drivers of pig artificial insemination based on imported fresh semen

Vincent¹,

Rugira²,

Dâ€TMAndre³

2018

Int. J. Livest. Prod.

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This study was conducted to assess the factors that affect pig litter size, proportion of live pigs at birth, number of inseminations per conception, and efficiency of artificial insemination. The main factors assessed were sow breed (n = 2), sire breed (n = 3), sow parity (n = 7) and insemination method (n = 2). The sow breeds used were Landrace, LL (n = 27) and Landrace × Pietran crossbreds, LP (n = 37); boar breeds used were Landrace (LL), Pietran (PP) and Landrace × Pietran crossbreds (LP). Sows were randomly inseminated either by boar or artificially, with semen freshly imported from Belgium to Rwanda. Landrace (LL) sows had significantly smaller (P<0.05) litter sizes at birth (9.04±0.72) compared to LP sows (11.49±0.45). On the other hand, the litter size for LL (9.04±0.58) and LP (11.49±0.67) sires did not differ, while PP sires had the highest (P<0.05) litter size (13.37±1.43). Interestingly, the method of insemination, whether use of a boar or artificially did not (P>0.05) affect the number of inseminations per conception, litter size, and proportion of piglets born live. Sow parity was found to have a linear relationship with a mean litter size at birth of 6.9±0.43 piglets for primiparous sows and 15.2±1.12 piglets for a sow of parity 7. However, the number of piglets born dead increased with parity, peaking at 3.0±0.66 (parity 7), while it was only 0.2±0.2 for parity 1. Therefore, the LP crossbred sows and Pietran sires are recommended. Artificial insemination should be promoted since it performed as well as natural insemination but provides other advantages such as African swine fever and inbreeding prevention, and avoids boar management costs.

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Section: Discussionmentioning

confidence: 89%

Success drivers of pig artificial insemination based on imported fresh semen

Vincent¹,

Rugira²,

Dâ€TMAndre³

2018

Int. J. Livest. Prod.

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“…Reproductive herd life days was defined as the number of days from the date that the gilts was first-inseminated to its removal [18]. Lifetime NPD was defined as the number of days when a female was neither gestating nor lactating during her reproductive herd life.…”

Section: Methodsmentioning

confidence: 99%

Characteristics and risk factors for severe repeat-breeder female pigs and their lifetime performance in commercial breeding herds

Tani

Piñeiro²,

Koketsu

2017

Porc Health Manag

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BackgroundRepeat-breeder females increase non-productive days (NPD) and decrease herd productivity and profitability. The objectives of the present study were 1) to define severe repeat-breeder (SRB) females in commercial breeding herds, 2) to characterize the pattern of SRB occurrences across parities, 3) to examine factors associated with SRB risk, and 4) to compare lifetime reproductive performances of SRB and non-SRB females. Data included 501,855 service records and lifetime records of 93,604 breeding-female pigs in 98 Spanish herds between 2008 and 2013. An SRB female pig was defined as either a pig that had three or more returns. The 98 herds were classified into high-, intermediate- and low-performing herds based by the upper and lower 25th percentiles of the herd mean of annualized lifetime pigs weaned per sow. Multi-level mixed-effects logistic regression models with random intercept were applied to the data.ResultsOf 93,604 females, 1.2% of females became SRB pigs in their lifetime, with a mean SRB risk per service (± SEM) of 0.26 ± 0.01%. Risks factors for becoming an SRB pig were low parity, being first-served in summer, having a prolonged weaning-to-first-mating interval (WMI), and being in low-performing herds. For example, served gilts had 0.81% higher SRB risk than served sows (P < 0.01). Also, female pigs in a low-performing herd had 1.19% higher SRB risks than those in a high-performing herd. However, gilt age at-first-mating (P = 0.08), lactation length (P = 0.05) and number of stillborn piglets (P = 0.28) were not associated with becoming an SRB female. The SRB females had 14.4–16.4 fewer lifetime pigs born alive, 42.8–91.3 more lifetime NPD, and 2.1–2.2 lower parities at culling than non-SRB females (P < 0.05).ConclusionsWe recommend that producers closely monitor the female pig groups at higher risk of becoming an SRB.

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“…Відомо, що якість і благополуччя поросят можуть бути поставлені під загрозу, коли плодючість свиноматок генетично підвищена до високого рівня, а генетичні поліпшення не спрямовані на збільшення кількості функціональних сосків і молочності маток (Koketsu et al, 2017).…”

Section: обговоренняunclassified

Reproductive performance of sows depending on different combinations of breeds and types

Khramkova¹

2019

TAVM

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From the standpoint of scientific achievements, it has been established that not a single animal husbandry industry in the world, with the exception of poultry farming, possesses such effective potential and develops as dynamically as pig breeding. Reproductive performance of sows is one of the main factors that characterizes the efficiency of pig breeding and its profitability. Practice shows that the selection of sows for reproductive qualities works, but it is necessary to approach in a comprehensive way. The efficiency of raising the reproductive qualities of the pigs is due to the combined ability of the original parent forms that is their compatibility with different variants of cross-breeding. The aim of the study was to analyze the reproductive qualities of sows to determine the best maternal form. The reproductive indices of sows of different foreign and domestic combinations of breeds and types are compared. Six groups of animals were formed on an analogue group basis which were evaluated using performance indicators. The final evaluation was carried out using the estimation and selection indices of sow reproductive performance. Crossbred sows of Yorkshire and Landrace breeds (Yi × Li) of Irish selection showed significantly better performance indicators (P ˂ 0.001) than other breeds. They excelled as sows with the largest litter size at birth (13.73 piglets), including live litter size (13.07 piglets), litter size at weaning (11.87 piglets) and litter weight at weaning (89.74 kg). The piglets of experience groups had lower indexes of living mass both at birth and at weaning, in relation to control, that confirms the display of biological antagonism of dependence of living mass of piglets from their amount in a nest. It was established, that the influence of maternal genotype was significant (P ˂ 0.01) and was higher compared with the boar genotype factor in the reproductive performance of sows and their complex indices. It is advisable to use sows (Yi × Li) as a productive maternal form in order to obtain commercial hybrids.

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Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

Cited by 196 publications

References 51 publications

Success drivers of pig artificial insemination based on imported fresh semen

Success drivers of pig artificial insemination based on imported fresh semen

Characteristics and risk factors for severe repeat-breeder female pigs and their lifetime performance in commercial breeding herds

Reproductive performance of sows depending on different combinations of breeds and types

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