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- W1929637355 abstract "Data from the Merino Plan database were used to estimate genetic parameters for body weight (BW), clean fleece weight (CFW), fibre diameter (FD), staple length (SL) and total weight of lamb weaned. The number of records that could be used ranged from 26533 for TWW to 124252 for BW. Fourtrait estimates of h2 were 0.35 for BW, 0.29 for CFW, 0.55 for FD, 0.26 for SL, and 0.05 for TWW (single-trait analysis). Genetic correlations among traits were mostly in accordance with published values. When expressed relative to the overall phenotypic means for the respective traits, genetic trends (for animals born during 1993 to 2005, for TWW 1993 to 2003) in the national flock were 0.52% for BW, -0.24% for CFW, -0.42% for FD, 0.19% for SL and 0.14% for TWW. Studs with extreme responses in relative economic value were identified and compared for their genetic trends. Relative to overall phenotypic means, genetic trends in the best performing stud were 1.09% for BW, 0.73% for CFW, -0.48% for FD, 0.74% for SL and 0.73% for TWW. Corresponding values for the worst performing stud were 0.02% for BW, -0.54% for CFW, -0.32% for FD, 0.17% for SL and -0.27% for TWW. The results indicate that genetic progress in the South African Merino industry is in the desired direction, although responses in individual traits are below those achievable in experimental populations. It is further evident that not all breeders apply the information supplied effectively and that other non-measured traits are also considered during selection." @default.
- W1929637355 created "2016-06-24" @default.
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- W1929637355 date "2007-01-01" @default.
- W1929637355 modified "2023-09-23" @default.
- W1929637355 title "Genetic change in some South African Merino Studs Participating in the Merino Plan" @default.
- W1929637355 hasPublicationYear "2007" @default.
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