Yazar "Alkan, Sezai" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Classification Tree Method for Determining Factors that Affecting Hatchability in Chukar Partridge (Alectoris chukar) Eggs
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2010) Karabag, Kemal; Alkan, Sezai; Mendes, Mehmet
    The study was carried out to investigate the effects of some external egg traits on hatchability using classification tree method (CTM) in Chukar partridge (Alectoris chukar). 1193 eggs were collected from 90 female partridges and 671 chicks were obtained from 847 fertile eggs. Overall hatching, fertility and hatchability of fertile eggs were determined as 56.2%, 79.2%, and 71.0%, respectively. Four variables (egg weight=EW, egg volume=EV, egg length=EL and egg breadth=EB) from external egg traits have a significant effect on hatchability was estimated with 75.6% accuracy by using the CTM. Hatchability (H) was occurred as 80.0% at higher eggs than 18.1 g while H was found as 56.0% at lesser eggs than 18.1 g. When EV and EB were higher than 27.2 and 3.14 cm respectively, H was around 82.1%. But, when EV was higher than 27.2 and EB was lower than 3.14 cm (Node 9) respectively, hatchability was lower than desired. EW greater than 18.1 g hatchability was affected significantly by EV, EL and EB. This situation can be regarded as an indicator for hatching from fertilized eggs. The first report on this subject which the external egg traits of Chukar partridges influenced on hatchability were demonstrated by CTM.
  • [ X ]
    Öğe
    EFFECTS OF SELECTION IN TERMS OF MEAT YIELD TRAITS ON LEPTIN RECEPTOR GENE IN JAPANESE QUAIL LINES
    (Univ Ljubljana, Veterinary Faculty, 2022) Karabag, Kemal; Alkan, Sezai; Karsli, Taki; Ikten, Cengiz; Sahin, Inci; Mendes, Mehmet
    This study was carried out to investigate the effects of selection on the single nucleotide polymorphisms (SNPs) in coding sequence of leptin receptor (LEPR) gene and possible associations between SNPs' and some meat yield traits of Japanese quail lines. Fifteen generations divergently selected two lines (HBW and LBW) for 5-weeks of age body weight and a control were used as materials for this study. A348-bp part of the LEPR coding region (18th exon) were sequenced in a total of 113 individuals from the three quail lines and shown that the fragments contained four SNPs loci (T490C, C528T, G537A, T571C) and five haplotypes (TTGT, CTGT, TCGT, TCAT, TCAC). T490C replacement caused the missense mutation of phenylalanine to convert to leucine (Phe>Leu). However, other SNPs were synonymous and there were no changes in transcripts. It was determined that the quails with higher phenotypic values were in the TT genotype at the T390C locus. Statistical analyses showed that there were significant differences among the quail lines, SNP alleles and haplotypes in terms of interested phenotypic traits (P<0.05), and also SNP and haplotype distributions changed depending on quail lines (P<0.001). When all results were evaluated together, it was concluded that the fifteen generations of selection caused significant changes in the LEPR gene in terms of economically important traits in Japanese quail lines (C. coturnix japonica).