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Relationship between Resistance to Hessian Fly and Powdery Mildew in Soft White Spring Wheat PI 468960 1
Author(s) -
Sunderman D. W.,
Hatchett J. H.
Publication year - 1986
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1986.0011183x002600050047x
Subject(s) - biology , powdery mildew , erysiphe graminis , botany , white (mutation) , horticulture , gene , poaceae , genetics , hordeum vulgare
Tests of F 2 and F 3 progenies from crosses of near‐isogenic spring wheat ( Triticum aestivum L.) lines of PI 468960 segregating for reaction to powdery mildew ( Erysiphe graminis DC. f. sp. tritici Em. Marchal) and Hessian fly [ Mayetiola destructor (Say)] suggested that the Pm3a and H 3 genes previously identified as located on chromosomes 1A and 5A, respectively, were linked in repulsion. Crossover values were calculated as 10.5 and 14.3%, by the maximum likelihood and product methods, respectively. Microsporocytes from F 1 plants of PI 468960/susceptible showed that a ring of four chromosomes caused the linkage. PI 468960 will be a useful parent in breeding programs where screening for resistance is limited to one pest.