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Genetics of Host Reaction to Corn Stunt Virus 1
Author(s) -
Grogan C. O.,
Rosenkranz E. E.
Publication year - 1968
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/cropsci1968.0011183x000800020034x
Subject(s) - biology , backcrossing , epistasis , leafhopper , genetics , heterosis , gene , dominance (genetics) , zea mays , host (biology) , agronomy , botany , hybrid , hemiptera
Progeny of combinations of one susceptible line (Mp420) with three resistant maize ( Zea mays L.) lines (T204, GT11, and CI21) were tested for three gorwing seasons to determine the genetics of host reaction to the leafhopper‐transmitted corn stunt virus. Dominance for resistance or susceptibility was lacking. The influence of heterosis favoring virus tolerance was apparent. Results indicated a relatively simple inheritance pattern. Studies of effects of genes indicated a strong additive influence, no dominance, and insignificant epistatic effects. A recurrent selection scheme would appear to be best for transferring resistance to susceptible material. If the plant breeder desires to transfer resistance to specific genotypes, a recurrent‐backcross approach is proposed where resistant segregates would be recombined before the1 next backcross. The approach is suggested also for other traits controlled by few genes, including modifiers.