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Genetic Variabilty for Resistance to Propanil Injury in Soybeans 1
Author(s) -
Karazawa Missae,
Caviness C. E.
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/cropsci1979.0011183x001900050049x
Subject(s) - propanil , biology , heritability , oryza sativa , trait , agronomy , cultivar , dominance (genetics) , quantitative trait locus , genotype , botany , genetics , weed control , horticulture , gene , computer science , programming language
Propanil (3′4′‐dichloropropionanilide) is applied by aircraft to rice [ Oryza sativa (L.)] for weed control, therefore, injury from spray drift of this herbicide frequently occurs on plants in nearby soybean [ Glycine max (L.) Merr.] fields. Severity of injury from drift has been shown to vary among soybean cultivars. We studied genetic variability for resistance to a drift rate in crosses between resistant ✕ resistant, susceptible ✕ resistant, and susceptible ✕ susceptible parents. Mean scores for F 1 populations from crosses between susceptible ✕ resistant parents indicated partial dominance for resistance to propanil injury. It was not possible from the data to determine the actual number of genes responsible for this trait, but F 2 distributions indicated a relatively small number was involved. Broad sense heritability estimates ranged from 38 to 50% in crosses involving susceptible ✕ resistant parents to near zero for crosses between susceptible ✕ susceptible and resistant ✕ resistant parents.