Mp. Mariot et al., EVALUATION OF THE INCIDENCE OF LEAF RUST AND STRAW RUST IN OAT INTERSPECIFIC CROSSINGS, Pesquisa agropecuaria brasileira (1977), 33(9), 1998, pp. 1481-1486
The wild species Avena vena sterilis L. has been employed for crossing
with Avena sativa L. cultivars in order to increase the genetic varia
bility and to transfer the important agronomic characteristics, mainly
the resistance to leaf rust (Puccinia coronata avenae) and to stem ru
st (Puccinia graminis avenae). An experiment was conducted at the Agro
nomic Experimental Station from UFRGS, to evaluate the natural inciden
ce of these diseases in the field in cultivated oat cultivars (UFRGS-7
, UFRGS-8 and UPF-7), in wild introductions of Avena sterilis (I-377,
I-378 and I-ARG) and in segregative generations from interspecific dre
ssing in the purpose of verifying the possibility of transferring this
wild genotype character for the cultivated ones. Genes for resistance
, mainly to leaf rust, were transferred from wild genotypes I-377 and
I-378 to Avena sativa. The possibility of transgressive segregation fo
r resistance in some crossings was also evidenced.