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Phenotypic Recurrent Selection for Resistance to Phytophthora Root Rot in Two Diploid Alfalfa Populations 1
Author(s) -
Heisey R. F.,
Murphy R. P.
Publication year - 1985
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/cropsci1985.0011183x002500040028x
Subject(s) - biology , medicago sativa , phytophthora megasperma , medicago , phytophthora , ploidy , caerulea , root rot , resistance (ecology) , botany , phycomycetes , horticulture , agronomy , inoculation , gene , genetics
The object of this study was to search for resistance to Phytophthora root rot (caused by Phytophthora megasperma Drechs. f. sp. medicaginis ) among 10 sources of two wild diploid species of alfalfa, Medicago caerulea Less. and M. falcata L. Phenotypic recurrent selection using a greenhouse screening technique was effective in increasing the levels of resistance in 2 of the 10 sources investigated, M. caerulea (PI 388629) and M. falcata (PI 410970). Resistant plants were not found in the other eight sources. These new sources of resistance may be genetically different from the sources currently available in cultivated autotetrapioid alfalfa ( M. sativa L .) L.