Abstract
Inheritance of reaction to race T-2 of Tilletia caries (DC.) Tul. was studied in populations of F3 and B2 lines from the cross Redman × S-615 (Triticum aestivum L.) and the respective backcrosses. Redman and S-615 were found to differ by three genes for bunt reaction. Redman possesses a major gene recessive for resistance, and two minor genes. Each of the minor genes is capable of conditioning a moderate degree of resistance alone but together they are capable of conditioning high resistance as a result of geometric gene actionCorrelation coefficients show that bunt reaction to race T-2 is not associated with wheat stem sawfly (Cephus cinctus Nort.) reaction, total stem solidness, solidness in each internode, awn type, glume color, plant height, or heading date.
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