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GREENHOUSE AND FIELD PERFORMANCE OF SORGHUM, SORGHUM BICOLOR (L.) MOENCH, RESISTANCE TO BIOTYPE E GREENBUGS, SCHIZAPHIS GRAMINUM (RONDANI) (PLANT BREEDING, SELECTION, HYBRIDS)
Abstract
Resistance of sorghum, Sorghum bicolor (L.) Moench, hybrids and selections to biotype E greenbug, Schizaphis graminum (Rondani), was studied in greenhouse and field experiments in 1984, 1985 and 1986. In 1984, the hybrids were tested along with their male parents at both seedling and adult stages in the greenhouse. Generally, resistance levels were consistent at both stages of crop growth. However, several hybrids showed resistance at one stage only. The greenhouse test in 1985 suggested that antixenosis is not important in these hybrids but this may have been resulted from lack of greenbug population. Field studies in 1984 and 1985 showed the importance of resistance in maintaining high yield under greenbug infestation. No succinct pathways of yield maintenance in the resistant hybrids could be elucidated by these studies. A group of selections were tested in the greenhouse and growth chamber in the winter of 1985/86 through the spring of 1986. Greenhouse studies showed marked differences among selections in the levels of resistance components estimated from greenbug-counting data in a two-phased free-choice test. The test suggested that the three components of resistance--antixenosis, antibiosis, and tolerance--are present in the selections independent of each other. The growth chamber test showed the importance of antixenosis in delaying the infestation of sorghum seedlings by greenbug. The male parents of the hybrids and the selections under study have the potentials to be used in the breeding program for producing hybrids or for population improvement.
Subject Area
Agronomy
Recommended Citation
DIMYATI, AHMAD, "GREENHOUSE AND FIELD PERFORMANCE OF SORGHUM, SORGHUM BICOLOR (L.) MOENCH, RESISTANCE TO BIOTYPE E GREENBUGS, SCHIZAPHIS GRAMINUM (RONDANI) (PLANT BREEDING, SELECTION, HYBRIDS)" (1986). ETD collection for University of Nebraska-Lincoln. AAI8706229.
https://digitalcommons.unl.edu/dissertations/AAI8706229