Effects of inbreeding on ovarian responses and embryo production from superovulated Mantiqueira breed cows

Alvarez, Rafael Herrera; Silva, Marcos Vinícius Gualberto Barbosa da; Carvalho, João Batista Pereira de; Binelli, Mário

doi:10.1016/j.theriogenology.2004.08.018

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…The regression equation was significant for transferable (R 2 = 0.91) but not for nontransferable (R 2 = 0.13) or total (R 2 = 0.63) embryos. In a subsequent study (18), Alvarez et al described a decrease in the count of transferable embryos in the inbreeding group: F X = 3%-5.9%, F X = 6%-8.9%, and F X = 9%-30%. The counts of transferable embryos in these groups were 7.0, 5.8, and 3.5, respectively.…”

Section: Discussionmentioning

confidence: 93%

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Bezdíček

Stádník²,

Makarevich³

et al. 2014

Turk J Vet Anim Sci

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The aim of this study was to evaluate the effect of inbreeding on the yield and quality of bovine embryos. The data were obtained from 125 Holstein cows superovulated on 3 farms in the Czech Republic. In total, 125 flushings of embryos were analyzed, from which 761 embryos were obtained. Of all donors, 36 cows were inbred (199 embryos) and 89 cows were noninbred (562 embryos). The inbred cows were divided into 2 groups according to their inbreeding coefficient (F X ) level. The low F X group (F X 1.26%-1.56%) had 23 cows and 147 embryos, and the high F X group (F X 3.1%-25%) was represented by 13 cows and 52 embryos. The average value of the F X coefficient in inbred cows was 6.552%. The data were subsequently analyzed using PROC GLM of SAS as descriptive statistics and t-tests (SAS/STAT ® 9. 1., 2009). All evaluated traits in inbred cows had worse results than noninbred cows. Although there were poorer results for inbred versus noninbred cows, the differences were not great at lower F X values and were not statistically significant. Important and significant differences (P ≤ 0.05) were found in the proportion of transferable embryos and unfertilized oocytes at higher rates of F X .

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Section: Discussionmentioning

confidence: 93%

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Bezdíček

Stádník²,

Makarevich³

et al. 2014

Turk J Vet Anim Sci

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“…When animal are bred following a TAI protocol, where ovulation is induced by GnRH estrus response and increased preovulatory concentration of estradiol before ovulation are critical determinants of subsequent embryo quality and potential pregnancy loss. According to [44] that inbred animals with a lower coefficient Fx had a very small and insignificant difference in quality and proportion of transferable embryos compared with group Fx=0. At greater inbreeding coefficients (3.1%-25%),%), the reduction in embryo quality increased.…”

Section: Linear Regression Between Dominant Follicle CL and Numbementioning

confidence: 99%

Application of Embryo Transfer Technology to Improve Fertility Using GnRH Plus Progesterone and Estradiol Combination (FTAI) of Local South Pesisir Cow in West Sumatra

Udin

Hendri

Masrizal

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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The objective of this research was to evaluate the effect of FTAI on embryo production that used GnRH plus progesterone combination to synchronize ovulation of 3 different parity of donor from local pesisir cows in west Sumatra. This study used timed embryo transfer program using GnRH plus progesterone combination in 3 local pesisir cows and 2 cows in time embryo program using estradiol plus progesterone of donor. Ovarian ultrasonography was performed on d 0 (time of AI) and at flushing to determine ovulatory diameter and ovulation. On d 0 at the time CIDR implant + PGF2α injection and on d 7 started ovsynch protocol administrated by injection GnRH and FSH for FTAI without detection estrus. The number and the quality of embryo was evaluated to determine the fertility of pesisir selatan cows. The result showed that the expression of estrus cows tend to high ovulation rate. The diameter size of a follicle was range from 5 to 15 mm with 10.67±2.96 mm in GnRH plus progesterone and 5 to 14 mm with mean was 8.75±2.05 mm in estradiol plus progesterone (P<0.005). The number of follicle ovulation was 27 in treatment A and 18 in treatment B (P<0.05). The number of CL and embryos was higher in treatment A. CL was 19, with 18 embryos and in treatment B was 9 with 6 embryos. The quality of embryo range from 1-4 grade with the transferable embryos was higher in treatment A than treatment B (P<0.05). There was the linear regression between ovular follicle, CL and number of embryos recovery of local pesisir cows. It was concluded that equal numbers of embryos and transferable embryo by using GnRH plus progesterone combination of local pesisir cows.

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“…Furthermore, inbreeding may negatively affect the quality of oocytes and embryos produced, as it happens with spermatozoa. There is yet not much evidence on this issue but data from cattle suggest that inbreeding does lower ovarian responses and the yield of transferable embryos (Alvarez et al. 2005).…”

Section: Genetic Resource Banks and Assisted Reproductive Techniquesmentioning

confidence: 99%

Inbreeding and Reproduction in Endangered Ungulates: Preservation of Genetic Variation through the Organization of Genetic Resource Banks

Roldán

Gomendio

Garde

et al. 2006

Reprod Domestic Animals

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There is a constant increase in the number of species suffering marked reductions in population size. This reduction in size and the lack of genetic flow may lead to a decrease in genetic variability and to matings between close relatives (i.e. inbreeding) with an ensuing reduction in fitness. It is thus important to understand the mechanism underlying the deleterious effects of inbreeding and to develop reproductive biotechnologies that will allow the reduction of inbreeding depression by facilitating gene exchange between populations. The study of three endangered species of gazelles, Cuvier's gazelle (Gazella cuvieri), Mohor gazelle (Gazella dama mhorr) and dorcas gazelle (Gazella dorcas neglecta) has revealed that inbreeding negatively affects several semen parameters (motility, sperm morphology, acrosome integrity). Semen cryopreservation has been achieved in the three species but success varies depending on the diluent employed and the level of inbreeding. Artificial insemination of Mohor gazelles have led to the birth of the first gazelle born using frozen-thawed semen but improvements are needed before this technology can be applied on a routine basis for the genetic management of the populations. Collection of oocytes after ovarian stimulation, followed by in vitro maturation, fertilization and culture has met with some initial success in the Mohor gazelle. These, together with other reproductive technologies, will offer an invaluable help in preserving the maximum of genetic diversity of these and related endangered ungulate species.

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Effects of inbreeding on ovarian responses and embryo production from superovulated Mantiqueira breed cows

Cited by 11 publications

References 14 publications

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Application of Embryo Transfer Technology to Improve Fertility Using GnRH Plus Progesterone and Estradiol Combination (FTAI) of Local South Pesisir Cow in West Sumatra

Inbreeding and Reproduction in Endangered Ungulates: Preservation of Genetic Variation through the Organization of Genetic Resource Banks

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