TY  - JOUR 
T1  - Fifty years of wheat breeding in Southern Brazil: yield improvement and associated changes
JO  - Pesquisa Agropecuária Brasileira
A1  - Rodrigues, Osmar
A1  - Lhamby, Julio César Barreneche
A1  - Didonet, Agostinho Dirceu
A1  - Marchese, José Abramo
SN  - 0100-204X
UL  - 10.1590/S0100-204X2007000600008
VL  - 42 
Y1  - 2007
PB  - Brazil 
ER  -