scholarly journals Genetics of Growth and Reproduction in the Turkey. 15. Effect of Long-Term Selection for Increased Egg Production on the Genetics of growth and Egg Production Traits

2002 ◽  
Vol 81 (3) ◽  
pp. 316-320 ◽  
Author(s):  
D.A. Emmerson ◽  
S.G. Velleman ◽  
K.E. Nestor
Keyword(s):  
Egg Production ◽  
Production Traits ◽  
Term Selection ◽  
Selection For ◽  
Growth And Reproduction

Effect of long term selection for juvenile body weight and egg production on semen quality in broiler breeder dam line

2017 ◽  
Vol 52 (2) ◽  
pp. 222
Author(s):  
M. Shanmugam ◽  
M. Niranjan ◽  
K. Rakesh ◽  
T.K. Bhattacharya ◽  
B.L.N. Reddy ◽  
...  
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Semen Quality ◽  
Broiler Breeder ◽  
Term Selection ◽  
Selection For

scholarly journals Effect of long-term selection for egg production on eggshell quality of Japanese quail (Coturnix japonica)

2016 ◽  
Vol 95 (11) ◽  
pp. 2570-2575 ◽  
Author(s):  
M.M. Fathi ◽  
A.E. El-Dlebshany ◽  
M. Bahie El-Deen ◽  
L.M. Radwan ◽  
G.N. Rayan
Keyword(s):  
Japanese Quail ◽  
Egg Production ◽  
Coturnix Japonica ◽  
Term Selection ◽  
Eggshell Quality ◽  
Selection For

scholarly journals Direct and Correlated Responses to Long-Term Selection for Increased Body Weight and Egg Production in Turkeys

1996 ◽  
Vol 75 (10) ◽  
pp. 1180-1191 ◽  
Author(s):  
KARL E. NESTOR ◽  
D.O. NOBLE ◽  
J. ZHU ◽  
Y. MORITSU
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
Correlated Responses ◽  
Term Selection ◽  
Selection For

Response to long‐term selection for egg production in laying hens

1996 ◽  
Vol 37 (4) ◽  
pp. 743-756 ◽  
Author(s):  
D. G. Poggenpoel ◽  
G. F. Ferreira ◽  
J. P. Hayes ◽  
J. J. du Preez
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Term Selection ◽  
Selection For

scholarly journals Optimum selection intensities in artificial selection programmes: an experimental evaluation

1977 ◽  
Vol 30 (2) ◽  
pp. 115-119 ◽  
Author(s):  
R. Frankham
Keyword(s):  
Experimental Evaluation ◽  
Selection Intensity ◽  
Effective Population ◽  
Term Selection ◽  
Optimum Selection ◽  
Selection For ◽  
Selection Intensities ◽  
Selection Of ◽  
Better Than

SUMMARYAn experimental evaluation of Robertson's (1970) theory concerning optimum intensities of selection for selection of varying durations has been carried out using published results from a long term selection study in Drosophila. Agreement of predicted rankings of treatments with expectations was excellent for low values of t/T (generations/total number scored) but poor for larger values of t/T. This was due to the 20% selection intensity treatments responding worse than expected and the 40% treatments relatively better than expected. Several possible reasons for the discrepancies exist but the most likely explanation is considered to be the greater reduction in effective population size due to selection in treatments with more intense selection.

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