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Inheritance of Stem‐Nematode Resistance in Alfalfa 1
Author(s) -
Elgin J. H.
Publication year - 1979
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/cropsci1979.0011183x001900030019x
Subject(s) - biology , selfing , inheritance (genetic algorithm) , nematode , inoculation , resistance (ecology) , medicago sativa , gene , genetics , botany , horticulture , agronomy , ecology , population , demography , sociology
Inheritance of resistance to stem nematode [ Ditylenchus dipsaci (Kühn) Filipjev] in alfalfa ( Medicago sativa L.) was investigated by selfing and testcrossing 25 resistant and three susceptible clones. Progeny were inoculated with stem nematodes and resistant:susceptible segregation ratios were determined. Segregation ratios could be explained under the hypothesis that resistance was conditioned by two complementary, dominant, tetrasomically inherited genes, Sn and Sn 1 . In addition, segregations from earlier reports proposing possible disomic multiple‐gene inheritance schemes were reevaluated and were found to fit tetrasomic inheritance schemes.