The Response of 1-Week Body Weight and 1 to 7-Week Growth Rate to Selection for 7-Week Body Weight in the Chicken
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چکیده
منابع مشابه
Divergent selection for four-week body weight in Japanese quail (Coturnix coturnix japonica): response to selection and realized heritability
The Japanese quail has been utilized as a research species in establishing the genetic relationships that may also be present in other species. Divergent phenotypic selection for 4-wk BW was conducted for three generations in high (HW) and low (LW) lines. Within each line, 50 females and 25 males were selected among 600 birds, based on 4-wk BW. Mean BW at 4 wk of age in the base generation was ...
متن کاملdivergent selection for four-week body weight in japanese quail (coturnix coturnix japonica): response to selection and realized heritability
the japanese quail has been utilized as a research species in establishing the genetic relationships that may also be present in other species. divergent phenotypic selection for 4-wk bw was conducted for three generations in high (hw) and low (lw) lines. within each line, 50 females and 25 males were selected among 600 birds, based on 4-wk bw. mean bw at 4 wk of age in the base generation was ...
متن کاملResponse to selection and genetic parameters of body and carcass weights in Japanese quail selected for 4-week body weight.
The current study was conducted to investigate the effect of short-term selection in Japanese quail for 4-wk BW and estimate genetic parameters of BW, carcass traits, and egg weight. A selected line and control line were randomly selected from a base population. In each generation, 39 sires and 78 dams were used as parents for the next generation. Data were collected over 2 consecutive hatches ...
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The aim of the present research was to evaluate the growth rate of the weight and body measurements of pheasants reared up to the 24th week of life, fed with all-mash mixtures. In the 3rd, 8th, 12th , 16th, 20th and 24th week of life the birds were weighed individually and their body measurements were measured based on which the growth rate indices of the traits researched were calculated. It w...
متن کاملWeek 7: Gravitational Lensing
According to general relativity, the trajectories of light rays can be bent by gravitational fields. Massive objects can therefore gravitationally “lens” the images of objects behind them. A cosmological examples of gravitational lensing is lensing of galaxies or quasars at redshifts z ∼ 1 by elliptical galaxies or galaxy clusters along the line of sight. If the lensing is “strong,” then there ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1966
ISSN: 0032-5791
DOI: 10.3382/ps.0450897