VERIFICATION OF ADULT PLANT RESISTANCE TO STRIPE RUST (P. STRIIFORMIS F.SP. TRITICI) IN INTERNATIONAL BREAD WHEAT NURSERIES IN CENTRAL ANATOLIA
F DÜSÜNCELI1, S ALBUSTAN1, L ÇETIN1 and SPS BENIWAL21Central Research Institute for Field Crops, PK 226, Ulus, Ankara, Turkey; 2ICARDA, Highlands Regional Program, P.K.39, Emek, Ankara, Turkey
Background and objectives
The most economical means of protection against rusts is the development and utilization of resistant cultivars. To facilitate this in the region, the International Center for Agricultural Research in the Dry Areas (ICARDA) based in Aleppo, Syria, in collaboration with CIMMYT, has been developing wheat germplasms with resistance to diseases of regional importance. This study was undertaken (i) to assess suitability of ICARDA/CIMMYT bread wheat germplasms for utilization in Central Anatolia as YR adult plant resistance sources, and (ii) to compare their YR resistance performance in Ankara with previous findings in middle-eastern countries.
Materials and methods
The entries were hand-sown in 2-m rows, with a susceptible check Michigan Amber (MA) repeated after every 10 entries, on October 20, 1996. Spreader borders consisting of MA, Little Club and Turkish variety Sürak 1593/51 were sown around the field. The inoculum was collected from around Ankara in the previous year, stored in liquid nitrogen and multiplied in a greenhouse in spring. The inoculum carrying virulences for YR 2, 6, 7, 9 and A+ was applied in talc powder and in mineral oil in March-April. The nurseries were sprinkle irrigated. Scoring was made using the Modified Cobb scale.
Of the GP nurseries, all nine YRGP entries showed high level of YR resistance, the highest score being 20 MSS and the remaining having ACI values of under 4. This was similar to the observations of ICARDA taken from Syria, Lebanon, Yemen and Egypt in previous years. In nurseries of YRGP, SRGP, LRGP, YRBGP and STGP, 9, 15, 9, 29 and 9 entries gave ACI values of under 20, respectively. Among the 82 GP entries the most remarkable cross was Bow #1/Fenkang 15 which gave ACI of less than 10 in 17 entries, and ACI of 18 in one entry. The differences between the ACI values of the GP entries in Ankara and Tel Hadya-Syria varied between 0-59. They were significantly higher (over 18) in Ankara only for nine (10.9%) entries. In 89.1 and 72.9% of the entries the ACI difference was under 10 or 5, respectively. The study indicated that YR resistance of the tested germplasm is mostly similar at both locations and thus could be exploited for use in the Central Anatolia of Turkey.