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Articles by N. Vali
Total Records ( 3 ) for N. Vali
  N. Vali , M.A. Edriss and H.R. Rahmani
  In order to estimate genetic parameters for body weights and carcass yield of 2 strains of quails; 32 pairs of Japanese quail (coturnix Japanese) and 26 pairs of range quail (coturnix ypisilophorus) randomly were selected from the base populations of parents. Produced progenies (650 birds) were used to estimate the genetic parameters of body weights and carcass characteristics traits. Body weights at 35, 42 and 49 days of ages were significantly different, while there was no significant difference for body weights at 63 days of age (p>0.05). Carcass weight, carcass percent, breast weight and thigh percent were significantly affected by strain source of variations (p<0.1). Estimated heritabilities for different traits were from 0.030±0.090 for breast weight of coturnix Japanese to 0.787±0.406 for thigh weight of coturnix ypisilophorus. Genetic correlation among body weights at 35, 42, 49, 63 days of age and among carcass traits (carcass weight, breast weight and thigh weight) were all positive and high, while genetic correlation for breast percent, and carcass percent were low. Genetic correlation of thigh percent with the other considered traits was negative except body weight at 42 days of age, which tended to be low.
  N. Vali , M.A. Edriss and H.R. Rahmani
  In order to determine characteristics for hatching of two quail strains 1500 eggs of Japanese quail (Cotunix Japanese) and 1200 eggs of Range quail (Coturnix ypsilophorus) were randomly selected from breeder quails (8-16 weeks of ages). The eggs were incubated in artificial incubation in six hatches. Fertility and hatchability of fertile eggs were 74.5±7.9 and 72.46±10.73, respectively. Egg, shell and chicken weights were 10.68±1.01, 0.82±0.08 and 7.547plusmn;0.84, respectively. Chicken and shell weights were significantly affected by strain (p<0.01), while there was no strain effects for fertility, infertility, egg weights (p>0.05). Hatchability (fertile and total eggs), egg weights, chicken weights, shell weights were significantly different in six hatches, while there were no significant differences for fertility and infertility of eggs.
  N. Vali
  Hen Day (H-D) and Hen-Housed (H-H) egg production for 135 day period compared in two quail strains and their reciprocal crosses in two separate trails. At the first trail in two hatches 180 Japanese quail (Coturnix japanese) and 180 Range quail (Coturnix ypisilophorus) were reared in two different spaces [litter with sawdust (250x200x230 cm) and one-tier cage (50x50x70 cm)]. The 130-day period production was measured from date of first egg for each female. Strain difference were not significant for H-D (p>0.05), but there were significant difference for H-H (p<0.01). Also H-D and H-H were significantly different by space of variations (p<0.01). Japanese quails with H-H 72.42±0.65% were significantly higher than Range quail with 62.68±1.07. At the second trail in two hatches 800 quails include four groups: 1- Japanese quails 2- Range quails 3- Hybrid 1 (R♂xC♀). 4- Hybrid 2 (C♂xR♀) were reared in four-tier cage from 28 days of age to experiment end. H-D and H-H of four groups were significantly different (p<0.01). Japanese quails with H-D 77.39±1.23% were the highest in four groups, but H-D between Japanese quail and H2 was not significantly different (p>0.05). H-D were not affected by hatch effects (p>0.05), but H-H at second hatch was significantly higher than first hatch. Egg weights were obtained with sample 35 eggs which randomly were selected at 70th, 115th and 175th days of age production for Japanese quails, hybrid 1, hybrid 2 and Range quails 11.16±0.16, 10.92±0.17, 10.61±0.11 and 11.06±0.12 g, respectively.
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