Izvorni znanstveni članak
VIRULENCE VARIABILITY IN PUCCINIA GRAMINIS F. SP. TRITICI AND PUCCINIA RECONDITA F. SP. TRITICI AND SOURCES OF RESISTANCE IN TRITICUM SPP.
Borivoje Kostić
; Institut za poljoprivredna istraživanja, Novi Sad
Momčilo Bošković
; Poljoprivredni fakultet Novi Sad
Sažetak
Stem and leaf rust of wheat have been rather common pathogens in Yugoslavia. This paper is being related to the physiological specialization of the causal fungi and to he testing of wheat stock for a search of the most appropriate sources of resistence. In the 1958-1972 period, 25 races of Puccinia graminis f. sp. tritici have been isolated in eastern part of the country. A few of them only (14, 21,34, 116, 208) were more or less regular in occurrence, while the other ones have had occasional appearance. In the latest three years the increase in prevalence was observed with races 1, 11, 34 and 186. In the same fifteen year period, 20 UN race groups of Puccinia recondita tritici have been identified in wheat samples collected in various sites over,the country. A sharp decrease of the ,race groups took place in 1971. and more drastically in 1972. Eight groups (1,2,3,6,9,10, 13, 17) in the former, and only three (3, 10, 13) in the latter were found to harbor wheat hosts. An immense number of wheat entries was tested with single races both in seedling and adult stages, but a limited one was of a good resistance against the most races in rust spectra.
Ključne riječi
Hrčak ID:
165181
URI
Datum izdavanja:
25.1.1975.
Posjeta: 679 *