Association between melatonin receptor 1A gene polymorphism and reproductive performance in Dorset ewes1

2009 ◽  
Vol 87 (8) ◽  
pp. 2485-2488 ◽  
Author(s):  
R. G. Mateescu ◽  
A. K. Lunsford ◽  
M. L. Thonney
Keyword(s):  
Gene Polymorphism ◽  
Reproductive Performance ◽  
Melatonin Receptor

Association between melatonin receptor 1A (MTNR1A) gene polymorphism and the reproductive performance of Mediterranean Italian buffaloes

2012 ◽  
Vol 24 (7) ◽  
pp. 983 ◽  
Author(s):  
S. Luridiana ◽  
M. C. Mura ◽  
M. Pazzola ◽  
M. Paludo ◽  
G. Cosso ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Genetic Marker ◽  
Breeding Season ◽  
Reproductive Performance ◽  
Reproductive Activity ◽  
Allelic Frequency ◽  
Genotypic Frequency ◽  
Melatonin Receptor ◽  
Reproductive Seasonality ◽  
Long Photoperiod

A melatonin receptor 1A (MTNR1A) gene polymorphism in adult buffaloes has been reported to affect reproductive seasonality. Consequently, the aim of the present study was to assess whether this polymorphism can affect age at first conception and the interval between first and second calving in Mediterranean Italian buffaloes. The allelic frequency of the C and T alleles was 0.44 and 0.56, respectively, whereas the genotypic frequency was 26% for C/C, 40% for C/T and 34% for T/T. The average age at first mating was approximately 20 months, whereas that at calving was approximately 32 months. The largest number of calvings of primiparous buffaloes was recorded between June and October. No associations between genotype, first mating and subsequent calving date were found. The duration from first to second calving was longer in buffaloes with the C/C genotype compared with those with the T/T and C/T genotypes (P < 0.01). The period of calving for buffaloes with the C/C genotype was mainly from July to September, whereas that for buffaloes with the T/T genotype was largely from March to May. The MTNR1A gene had no effect on the age of first conception in Mediterranean Italian buffaloes. Rather, the association between the T/T genotype and reproductive activity during days with a long photoperiod indicates that this polymorphism may be considered a genetic marker to identify buffaloes that are able to reproduce out of the breeding season.

scholarly journals Relationship between MT1 melatonin receptor gene polymorphism and seasonal physiological responses in Île-de-France ewes

2005 ◽  
Vol 45 (2) ◽  
pp. 151-162 ◽  
Author(s):  
Xochitl Hernandez ◽  
Loys Bodin ◽  
Didier Chesneau ◽  
Daniel Guillaume ◽  
Philippe Chemineau ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Receptor Gene ◽  
Physiological Responses ◽  
Melatonin Receptor ◽  
Receptor Gene Polymorphism ◽  
Mt1 Melatonin Receptor

Relationship between MTNR1B (melatonin receptor 1B gene) polymorphism rs10830963 and glucose levels in overweight children and adolescents†

2011 ◽  
Vol 12 (4pt2) ◽  
pp. 435-441 ◽  
Author(s):  
Thomas Reinehr ◽  
André Scherag ◽  
Hai-Jun Wang ◽  
Christian L Roth ◽  
Michaela Kleber ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Children And Adolescents ◽  
Overweight Children ◽  
Melatonin Receptor ◽  
Glucose Levels ◽  
Melatonin Receptor 1B

scholarly journals Effects of BF Gene Polymorphism on the Reproductive Performance of Hybrid Polish Landrace X Polish Large White Sows

2016 ◽  
Vol 66 (1) ◽  
pp. 125-131
Author(s):  
Dorota Napierała ◽  
Maria Kawęcka ◽  
Eugenia Jacyno ◽  
Beata Matysiak ◽  
Anita Kołodziej-Skalska
Keyword(s):  
Gene Polymorphism ◽  
Litter Size ◽  
Reproductive Performance ◽  
Reproductive Traits ◽  
Specific Primers ◽  
Large White ◽  
Potential Relationship ◽  
Pcr Rflp

AbstractThe aim of this study was to determine the potential relationship between variants of the BF gene and litter size in Polish Landrace x Polish Large White sows. To identify polymorphism within the BF gene, the PCR-RFLP method was applied, using specific primers and the SmaI enzyme. The researchers identified the presence of two alleles, T and C, with frequencies: 0.68 and 0.32, giving three genotypes with frequencies: 0.49, 0.37 and 0.14, respectively for TT, TC and CC. Analysis of relationships between the various genotypes of the BF gene and selected reproductive traits showed significant differences. Sows with TT genotype in the BF locus, gave birth to significantly more live piglets in the first litter (10.24) compared with sows with the CC genotype (7.13).

scholarly journals Melatonin Receptor 1A Gene Polymorphism Associated with Polycystic Ovary Syndrome

2011 ◽  
Vol 72 (2) ◽  
pp. 130-134 ◽  
Author(s):  
Chao Li ◽  
Yuhua Shi ◽  
Li You ◽  
Laicheng Wang ◽  
Zi-Jiang Chen
Keyword(s):  
Polycystic Ovary Syndrome ◽  
Gene Polymorphism ◽  
Polycystic Ovary ◽  
Melatonin Receptor ◽  
Ovary Syndrome

scholarly journals Relationship between MT1 melatonin receptor gene polymorphism and seasonal physiological responses in Île-de-France ewes

2005 ◽  
Vol 45 (4) ◽  
pp. 525-525 ◽  
Author(s):  
Xochitl Hernandez ◽  
Loýs Bodin ◽  
Didier Chesneau ◽  
Daniel Guillaume ◽  
Daniel Allain ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Receptor Gene ◽  
Physiological Responses ◽  
Melatonin Receptor ◽  
Receptor Gene Polymorphism ◽  
Mt1 Melatonin Receptor

scholarly journals Effect of PRNP Gene Polymorphism on Reproductive Performance of Mother Sheep and their Offspring Growth

2012 ◽  
Vol 56 (3) ◽  
pp. 279-282 ◽  
Author(s):  
Tomasz M. Gruszecki ◽  
Monika Greguła-Kania ◽  
Roman Niżnikowski ◽  
Mirosław Pięta ◽  
Krzysztof Kostro ◽  
...  
Keyword(s):  
Amino Acids ◽  
Gene Polymorphism ◽  
Prion Protein ◽  
Reproductive Performance ◽  
Prnp Gene ◽  
High Susceptibility ◽  
Sheep Population ◽  
Offspring Growth ◽  
Very High ◽  
Reproduction Efficiency

Abstract The polymorphism of prion protein (PrP) amino acids in codons 136 (A/V), 154 (R/H); and 171 (Q/R/H) was established. Reproductive performance of mother sheep was evaluated analysing the fertility coefficient and litter size, i.e. the number of born and reared lambs. The studies included mothers of synthetic lines BCP - 111 sheep and SCP - 104 sheep born in 2001-2007. In the examined ovine PRNP gene, the following four alleles were identified: ARR, AHQ, ARQ, and VRQ, with the absence of the ARH allele. The highest frequency was determined for the ARR (49.8%) and ARQ (45.8%) alleles. In the studied sheep population, the occurrence of seven different genotypes was reported. It was found that 71.6% of the animals had the genotypes ARR/ARR, ARR/ARQ, and ARR/AHQ, which are regarded as the most resistant to scrapie, while 7.9% of the population had ARR/VRQ-bearing genotypes (low resistance) or ARQ/VRQ ones (high susceptibility to scrapie). The analysis of the obtained results indicates that the PRNP genotype does not affect reproduction efficiency of mothers, or their offspring growth. It was concluded that flock elimination of ewes of genotypes with high and very high susceptibility to scrapie will not reduce the reproduction parameters of ewes or growth of their lambs.

Growth hormone gene polymorphism and reproductive performance of ai bulls

1999 ◽  
Vol 52 (7) ◽  
pp. 1145-1152 ◽  
Author(s):  
D. Lechniak ◽  
G. Machnik ◽  
M. Szydlowski ◽  
M. Switonski
Keyword(s):  
Growth Hormone ◽  
Gene Polymorphism ◽  
Reproductive Performance ◽  
Growth Hormone Gene
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