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Comparison of Selection Methods for Autotetraploids. II. Selection for Disease Resistance in Alfalfa 1
Author(s) -
Haag W. L.,
Hill R. R.
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/cropsci1974.0011183x001400040030x
Subject(s) - biology , selection (genetic algorithm) , medicago sativa , plant disease resistance , resistance (ecology) , botany , agronomy , genetics , gene , artificial intelligence , computer science
One generation of selection based on selfed progeny test, selfed family, polycross progeny test, polycross family, and individual phenotype was conducted for resistance to Uromyces striatus Schroet. var. medicaginis (Pass.) Arth., Phoma herbarum West var. medicaginis Fckl., and Stem. phylium botryosum Wallr. in alfalfa ( Medicago sativa L.). Selected individuals from each method with each pathogen were intermated separately. The resulting populations were compared experimentally to evaluate relative effectiveness of the selection methods. Each method of selection produced a significant increase in resistance to U. striatus . Selfed progeny test and selfed family selection gave similar responses and were the most effective methods. Polycross progeny test and polycross family selection also gave similar responses, but were the least effective methods for U. striatus resistance. Response with individual selection was intermediate to responses with selfed and polycross methods. Each of the progeny test and family methods produced similar and significant increases in resistance to P. herbarum . Individual selection for resistance to P. herbarum was not effective. No method of selection produced a significant increase in resistance to S. botryosum