Selection for testis size and correlated responses of female reproductive traits in golden hamsters

2012 ◽  
Vol 84 (5) ◽  
pp. 382-388 ◽  
Author(s):  
Tsutomu Furukawa ◽  
Takashi Awata ◽  
Masahiro Satoh
2014 ◽  
Vol 47 (5) ◽  
pp. 1488-1498 ◽  
Author(s):  
Azhar Hamzah ◽  
Nguyen Hong Nguyen ◽  
Wagdy Mekkawy ◽  
Hooi Ling Khaw ◽  
Hoong Yip Yee ◽  
...  

1992 ◽  
Vol 63 (5) ◽  
pp. 495-502
Author(s):  
Tsutomu FURUKAWA ◽  
Takashi AWATA ◽  
Yasuo SHIOYA ◽  
Hirotaka TANAKA

1981 ◽  
Vol 53 (6) ◽  
pp. 1458-1464 ◽  
Author(s):  
R. D. Allrich ◽  
C. T. Wang ◽  
G. E. Dickerson ◽  
Dwane R. Zimmerman

Crop Science ◽  
2002 ◽  
Vol 42 (3) ◽  
pp. 730 ◽  
Author(s):  
C. T. Cervantes-Martinez ◽  
K. J. Frey ◽  
P. J. White ◽  
D. M. Wesenberg ◽  
J. B. Holland

1990 ◽  
Vol 51 (1) ◽  
pp. 23-34 ◽  
Author(s):  
R. A. Mrode ◽  
C. Smith ◽  
R. Thompson

ABSTRACTSelection of bulls for rate and efficiency of lean gain was studied in a herd of Hereford cattle. There were two selection lines, one selected for lean growth rate (LGR) from birth to 400 days and the other for lean food conversion ratio (LFCR) from 200 to 400 days of age, for a period of 8 years. A control line bred by frozen semen from foundation bulls was also maintained. Generation interval was about 2·4 years and average male selection differentials, per generation were 1·2 and — 1·1 phenotypic standard deviation units for LGR and LFCR respectively.Genetic parameters and responses to selection were estimated from the deviation of the selected lines from a control line and by restricted maximum likelihood (REML) techniques on the same material. Realized heritabilities were 0·40 (s.e. 0·12) for LGR and 0·40 (s.e. 0·13) for LFCR using the control line. Corresponding estimates from REML were 0·42 (s.e. 0·10) and 0·37 (s.e. 0·14). The estimate of the genetic correlation between LGR and LFCR was about — 0·69 (s.e. 0·12) using REML.The estimates of direct annual genetic change using deviations from the control were 3·6 (s.e. 1·3) g/day for LGR and — 0·14 (s.e. 0·07) kg food per kg lean gain for LFCR. Corrsponding estimates from REML were similar but more precisely estimated. The correlated responses for LFCR in the LGR line was higher than the direct response for LFCR.


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