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Isolation Requirements for Foundation Alfalfa Seed Fields 1
Author(s) -
Brown D. E.,
Kehr W. R.,
Manglitz G. R.
Publication year - 1981
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/cropsci1981.0011183x002100040037x
Subject(s) - biology , cultivar , medicago sativa , acyrthosiphon pisum , aphid , agronomy , germplasm , resistance (ecology) , aphididae , horticulture , homoptera , pest analysis
Two alfalfa ( Medicago sativa L.) cultivars in commercial production were used to study isolation distance for foundation seed production using insect resistance traits as genetic markers. Twenty‐one seed samples were obtained for comparison with foundation and certified seed lots. Spotted alfalfa aphid [ Therioaphis maculata (Buckton)] resistance values indicated adequate isolation at 0.4 km (1,320 feet) and no shift in resistance from breeder seed to the foundation seed generation. Resistance to pea aphid [ Acyrthosiphon pisum (Harris)] could not be used to measure cross‐fertilization between cultivars because the range of resistance overlapped between cultivars.