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Comparison of Expected Genetic Advance with Selection on the Basis of Clone and Polycross Progeny‐Test Performance in Alfalfa 1
Author(s) -
Hill R. R.,
Pedersen M. W.,
Elling L. J.,
Cleveland R. W.,
Graham J. H.,
Frosheiser F. I.,
Starling J. L.
Publication year - 1971
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/cropsci1971.0011183x001100010031x
Subject(s) - biology , heritability , selection (genetic algorithm) , chaff , medicago sativa , clone (java method) , botany , horticulture , agronomy , genetics , gene , artificial intelligence , computer science
Sixty‐seven alfalfa, Medicago sativa L., clones and their polycross progenies were evaluated for hay, seed, and chaff yields. The progenies were also evaluated in separate experiments for resistance to Corynebacterium insidiosum (McCull.) Jens.; Leptosphaerulina briosiana (Poll.) Graham & Luttrell; Pseudopeziza medicaginis (Lib.) Sacc.; Phoma herbarum West. f. medicaginis West, ex. Rab.; and Uromyces striatus Schroet. var. medicaginis (Pass.) Arth. Expected genetic gains with selection on the basis of clone and polycross progeny‐test performance were compared for each of the characters. Relative effectiveness of the two methods varied with heritability of the trait and the selection intensity permitted with each method; the polycross progeny test was favored with traits which had low heritability. Expected advance from selection on the basis of polycross progeny‐test performance was greater for hay, seed, and chaff yields, but expected advance with individual plant selection was greater for resistance to some of the pathogens.