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Inheritance of a Second Major Gene for Resistance to Phytophthora Rot in Soybeans 1
Author(s) -
Kilen T. C.,
Hartwig E. E.,
Keeling B. L.
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/cropsci1974.0011183x001400020027x
Subject(s) - phytophthora megasperma , phytophthora sojae , biology , locus (genetics) , phytophthora , genetics , cultivar , gene , plant disease resistance , botany , horticulture , elicitor
The inheritance of another gene for resistance to Phytophthora megasperma Drechs. var. sojae Hildeb. in soybeans [ Glycine max (L.) Merr.] was studied. This dominant gene, proposed as Rps 2 , is found in the cultivars ‘CNS’ and derived strains. The results obtained indicated that Rps 2 is at a locus different from the Rps , rps 2 , rps locus. It is suggested that the first locus should now be changed from Rps , rps 2 , rps to Rps 1 , rps 1 2 , rps 1 to distinguish it from the second locus, Rps 2 rps 2 , Rps 2 has given a high level of resistance to phytophthora rot in repeated field plantings under conditions favorable for development of the disease. Screening for Rps 2 is easily accomplished by growing plants in a liquid culture medium with the pathogen.