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Reaction of Wheat Varieties to Composites of Races of Bunt Occurring in the Pacific Northwest 1
Author(s) -
Martin J. Foster
Publication year - 1936
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1936.00021962002800080008x
Subject(s) - division (mathematics) , agriculture , agronomy , agricultural experiment station , mathematics , agricultural science , engineering , political science , geography , biology , archaeology , arithmetic
TSCHARNER, according to Woolrnan and Humphrey (16) 3, was the first to mention a varietal difference for resistance of ~Theat to bunt when he stated in 1764 that whi~e spel~ w~s more liable ~o bun~ ~han red spel~. S~nce ~ha~ ~ime, considerable dat~ h~ve been publ~shed sho~ng ~ha~ rarefies d~ffer ~n ~he~r resistance ~o the bun~ organism. In ~9=~, Par~s (?) published the firs~ evidence of physiologic specialization in bunt. About ~ decade ~go, the quest for h~gh-yield~ng v~rieties of whea~ which also were resistant to bunt (Tilletia tritici (Bjerk.) Wint., and T. le~s Kflhn) appeared relatively simple. In 1922, Stephens ~d Woolman (13) found in their experiments nearly ~o varieties thought ~o be safe for sowing withou~ seed treatment, but many of them were not suitable for commercial production. Schafer, Gaines, and Barbee (i~) reported in ~9~6 that Albit, Hussar, Martin, Ridit, and White Odessa were ~oo~ resistant in their trials. In recent years, physiologic races have been found which infect most of ghe va~eties fomerly considered highly resistant or immune. Luckily, ghere are differengial reactions between resistant whea~ varieties and the morevirulent races of bunt, and a number of varieties are resistant to many races. ~ile ~he development by hybridization of agronomically desirable smut-resistant wheats is more involved than it fo~erly appeared to be, it nevertheless remains feasible. Some of the most virulent races of bun~ known to exis~ have been found within relatively small areas in the Col~bia Basin of Oregon, Washington, and Idaho. The investigations reported herein were made de~e~ine the relative susceptibility and resistance of most of wh~ varieties grown in *he United S~a*es ~o collections of bunt from the dw lands of ~he Pacific Northwest. Tests of this kind should provide valuable info~ation for use in hybridization programs.