caa a22 4500 397568371 CHVBK 20180308164834.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.3382/ps.0750472 doi (NATIONALLICENCE)oxford-10.3382/ps.0750472 Divergent Selection for Body Weight and Yolk Precursor in Coturnix coturnix japonica [Elektronische Daten] 11. Correlated Responses Over Thirty Generations1 [K. E. NESTOR, W. L. BACON, N. B. ANTHONY, D. O. NOBLE] Japanese quail lines were divergently selected for 4-wk BW (HW and LW lines) and plasma yolk precursor [total plasma phosphorus (TPP); HP and LP lines] for 30 generations. The base population was a randombred control line (R1) that was maintained along with the selected lines. Sublines were established from the ninth selected generation of HW by continuing to select males for increased 4-wk BW and selecting females for increased (HW-HP line) or decreased (HW-LP line) TPP. Correlated responses over the entire selection period were measured. Egg production of HW, LW, HP, and HW-HP declined over generations. There was a positive quadratic component to the change in HW indicating that the change in egg production over generations was decreasing. There was no significant change in egg production of LP. Number of ovarian follicles in rapid development increased in LP and decreased in LW and HP, Total follicular weight increased in HW and LP and decreased in LW. Production of abnormal eggs increased over generations in HW and HW-HP. Body weight at the beginning and end of the laying period increased in HW, HW-HP, HW-LP, and LP and decreased in LW. Egg weight increased in HW and HW-HP and decreased in LW and LP. The increase in egg weight of HW was due to a disproportionate increase in shell and yolk. Wet weight of the liver increased in HW and decreased in LW and HP. Dry liver weight decreased in LW, HP, and LP. Mortality to 4 wk of age increased in LW, HP, and LP. © 1996 Poultry Science Association, Inc. Breeding and Genetics nationallicence Japanese quail nationallicence body weight nationallicence total plasma phosphorus nationallicence reproduction nationallicence correlated responses nationallicence NESTOR K. E. aut BACON W. L. aut ANTHONY N. B. aut NOBLE D. O. aut Poultry Science Oxford University Press 75/4(1996-04), 472-477 0032-5791 75:4<472 1996 75 ps https://doi.org/10.3382/ps.0750472 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0750472 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- NESTOR K. E. aut NATIONALLICENCE 700 1- BACON W. L. aut NATIONALLICENCE 700 1- ANTHONY N. B. aut NATIONALLICENCE 700 1- NOBLE D. O. aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/4(1996-04), 472-477 0032-5791 75:4<472 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence SWISSBIB 39756791X BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford