Premium
Gene Pm5 for Resistance to Erysiphe graminis f. sp. tritici in Hope Wheat 1
Author(s) -
Lebsock K. L.,
Briggle L. W.
Publication year - 1974
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/cropsci1974.0011183x001400040020x
Subject(s) - biology , powdery mildew , chlorosis , locus (genetics) , inoculation , erysiphe graminis , fungus , gene , botany , phenotype , genetics , poaceae , microbiology and biotechnology , horticulture , hordeum vulgare
‘Hope’ wheat ( Triticum aestivum L.) is known to be resistant to certain cultures of the powdery mildew fungus, Erysiphe graminis DC. f. sp. tritici Em. Marchal. We inoculated parental, F 2 , and F 3 populations from crosses of Hope with four lines near‐isogenic for Pm1 , Pm2 , Pm3a , and Pm4 , with three cultures of the powdery mildew fungus. Our data showed that Hope has a single, recessive gene pan: that conditions resistance to the fungus and that the gene is different from Pm1 , Pm2 , Pm3a , and Pm4 . The symbol Pm5 has been assigned to the Hope locus. The phenotype of pm5 is best expressed when the host is inoculated at the four to five leaf stage of growth. Reaction of Hope is characterized by marked chlorosis surrounding lesions.