Evaluation of STR set for bovine traceability in the context of Chinese Beef Imports and Argentine-Chinese beef trade.

ROGBERG MUÑOZ A; WEI S; RIPOLI M V; GUO B; GOSZCZYNSKI D E; CARINO M H; CASTILLO N S; MELUCCI N S; VILLARREAL E; LIRON J P; CRESPI J A; WEI Y M; GIOVAMBATTISTA G

Cairns

Congreso; 33rd Conference of the International Society of Animal Genetics; 2012

International Society for Animal Genetics

Genetic traceability allows individual, breed or species identifcation. Furthermore, it has a proved use to detect frauds and, to protect and valorise local productions. The objective of the present work was to evaluate 22 STRs in 357 animals corresponding to 4 Chinese populations, and 9 Bos taurus and 2 B. indicus breeds raised in Argentina, and commonly raised in the whole world. PCA showed that the frst PC accounted for 22% of the total variance and differentiate Zebuine from Taurine breeds, and admixtured were intermediate located. The second PC (16% of the variance) distin-guished the European from Asiatic Taurine breeds. FST showed signifcant differences across the populations (FST = 0.12). AMOVA differences among and within populations account for 11.42% and 88.58% of genetic variance. When breeds were grouped according to their origin, AMOVA showed differences among groups of 2.16%, while among populations within groups was 9.82%. Variance within individuals explained 88.02%. For K = 13 Structure clustered all Argentine breeds in- dependently, but Brangus assigned with Angus. Part of Chinese populations shared a common cluster, while the other was wrong allocated as Limousin. The results evidence that it would be possible to differentiate many of the most commonly raised beef breeds from those typically produced in China