Incubation Period of Chickens Selected Bidirectionally for Juvenile Body Weight
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چکیده
منابع مشابه
Transcriptional analysis of the liver in juvenile broiler chickens divergently selected for high or low body weight
egg ω-3 content for the fl axseed diet (from 546 to 578 mg/60g egg; P=0.02) and for the Linpro diet (from 415 to 438 mg/60g egg; P=0.07). As well, an overall decrease (P=0.01) in ω-6 to ω-3 ratio (from 1.53 to 1.47) was noted. Enzyme addition increased (P=0.02) the NSP digestibility from 17.2 to 24.6%. There was no signifi cant effect of enzyme addition on total tract fat digestibility. Overall...
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Artificial selection of White Plymouth Rock chickens for juvenile (day 56) body weight resulted in two divergent genetic lines: hypophagic low weight (LWS) chickens and hyperphagic obese high weight (HWS) chickens, with the latter more than 10-fold heavier than the former at selection age. A study was designed to investigate glucose regulation and pancreas physiology at selection age in LWS chi...
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By studying genomic changes over time in populations subjected to strong artificial directional selection, we can gain insights to the dynamics of beneficial alleles originating from the founder population or emerging as novel mutations undergoing ongoing selection. The Virginia lines are a chicken resource population generated by long-term bi-directional, single-trait selection for juvenile bo...
متن کاملRemoval of residual yolk at hatch influences food choice and feeding activity in lines of chickens selected for high or low juvenile body weight.
The effect of residual yolk removal at hatch on growth and feeding behavior was assessed in lines of chickens divergently selected for low (LW) or high (HW) 56-day body weight. At hatch chicks were assigned to 1 treatment: removal of the residual yolk (R) or no surgery (I). Twenty-four chicks per line (12 I and 12 R) were assigned to an all-mash regimen (M) and 48 per line (24 I and 24 R) to a ...
متن کاملMapping QTL for growth and shank traits in chickens divergently selected for high or low body weight.
An F(2) population (695 individuals) was established from broiler chickens divergently selected for either high (HG) or low (LG) growth, and used to localize QTL for developmental changes in body weight (BW), shank length (SL9) and shank diameter (SD9) at 9 weeks. QTL mapping revealed three genome-wide QTL on chromosomes (GGA) 2, 4 and 26 and three suggestive QTL on GGA 1, 3 and 5. Most of the ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1968
ISSN: 0032-5791
DOI: 10.3382/ps.0470105