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
Keyword(s):  
Reproductive Traits ◽  
Testis Size ◽  
Correlated Responses ◽  
Golden Hamsters ◽  
Selection For ◽  
Female Reproductive Traits

Genetic parameters and correlated responses in female reproductive traits in the GIFT strain

2014 ◽  
Vol 47 (5) ◽  
pp. 1488-1498 ◽  
Author(s):  
Azhar Hamzah ◽  
Nguyen Hong Nguyen ◽  
Wagdy Mekkawy ◽  
Hooi Ling Khaw ◽  
Hoong Yip Yee ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Reproductive Traits ◽  
Correlated Responses ◽  
The Gift ◽  
Female Reproductive Traits

scholarly journals The Possibility of the Indirect Selection for Ovulation Rate Based on Testis Size in Golden Hamsters

1992 ◽  
Vol 63 (5) ◽  
pp. 495-502
Author(s):  
Tsutomu FURUKAWA ◽  
Takashi AWATA ◽  
Yasuo SHIOYA ◽  
Hirotaka TANAKA
Keyword(s):  
Indirect Selection ◽  
Ovulation Rate ◽  
Testis Size ◽  
Golden Hamsters ◽  
Selection For

Selection for Increased Rate or Efficiency of Lean Growth in Rats: Correlated Responses in Reproductive Performance

1981 ◽  
Vol 53 (6) ◽  
pp. 1458-1464 ◽  
Author(s):  
R. D. Allrich ◽  
C. T. Wang ◽  
G. E. Dickerson ◽  
Dwane R. Zimmerman
Keyword(s):  
Reproductive Performance ◽  
Correlated Responses ◽  
Or Efficiency ◽  
Lean Growth ◽  
Selection For

Correlated Responses to Selection for Greater β-Glucan Content in Two Oat Populations

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
Keyword(s):  
Correlated Responses ◽  
Selection For

Selection for rate and efficiency of lean gain in Hereford cattle 1. Selection pressure applied and direct responses

1990 ◽  
Vol 51 (1) ◽  
pp. 23-34 ◽  
Author(s):  
R. A. Mrode ◽  
C. Smith ◽  
R. Thompson
Keyword(s):  
Genetic Parameters ◽  
Control Line ◽  
Correlated Responses ◽  
Direct Response ◽  
Lean Growth ◽  
Hereford Cattle ◽  
Frozen Semen ◽  
Phenotypic Standard Deviation ◽  
Selection For ◽  
Selection Of

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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