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Evidence of inheritance of resistance to the mexican bean beetle in soybeans

, : Evidence of inheritance of resistance to the mexican bean beetle in soybeans. Crop Science 16(6): 835-837

The inheritance of resistance to the Mexican bean beetle [MBB], (Epilachna varivestis Mulsant), in soybeans, (Glycine max L. Merr.), was evaluated using F3 popualtions. Four populations were obtained by crossing resistant plant introductions to susceptible commercial cultivars. Ratings of percent foliar damage were made on F3 progeny rows containing 25 plants. Progeny rows were replicated 2-4 times depending on seed availability. Parental lines were also grown for comparison. Population means were recorded and estimates of genotypic, environmental and phenotypic variances computed. Broad sense heritability estimates were calculated for each population. Significant genetic variance occurred in all populations. A quantitative inheritance of resistance in soybeans was suggested. Percent foliar damage approximated a normal distribution in the F3 populations exposed to a moderate to heavy MBB infestation. Population means of the F3 progeny were not significantly different from their mid-parent values, alluding to a primarily additive gene action. Several F3 progeny rows with levels of resistance equal to the mean of the resistant parent were observed. Involvement of only 2-3 major genes is suggested, although the exact number of genes controlling resistance was not determined. Broad sense heritabilities were from 44-81% under the conditions of this investigation.

Accession: 005411521

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Related references

Duyn, J.W.V.n; Turnipseed, S.G.; Maxwell, J.D., 1972: Resistance in soybeans to the Mexican bean beetle: II. Reactions of the beetle to resistant plants. When fed foliage from the resistant genotypes PI229358,PI227687 AND PI171451, individuals of Epilachna varivestis had differential preferences for each genotype and shows marked reactions as a result of the preferences. These included reduced long...

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Duyn, J.W.V.n Turnipseed, S.G.; Maxwell, J.D., 1971: Resistance in soybeans to the Mexican bean beetle. I. Sources of resistance. The varieties Bragg and Nela were less susceptible to Epilachna varivestis than three others. In a study of 23 selections in the field, PI229358, PI171451 and PI227687 were highly resistant and were unsatisfactory as food for the beetles even when...

Elden, T.C.; Schillinger, J.A.; Steinhauer, A.L., 1974: Field and laboratory selection for resistance in soybeans to the Mexican bean beetle. More than 350 soy-bean lines were screened for resistence to Epilachna varivestis Muls. in field and laboratory experiments in the United States in 1971 and 1972. Entries with low feeding damage scores in the field were screened in the laboratory...

Nolting, SP., 1988: Yield response of soybeans to consecutive growth stage defoliation by the Mexican bean beetle, Epilachna varivestis Mulsant, and methods of predicting defoliation from field sample estimates of Mexican bean beetle numbers and plant leaf area. Dissertation Abstracts International B Sciences and Engineering, 4810: 2863

Underwood, N.C.; Rausher, M.D., 1995: Timing and responsiveness of induced resistance to Mexican bean beetle herbivory in soybeans. Bulletin of the Ecological Society of America 76(2 SUPPL PART 2): 269

Paz, P.E., 1974: Heritability of Mexican bean beetle resistance in soybeans and interrelationships with agronomic characters. Two seven-parent diallel sets of crosses were studied at two localities in 1973. Moderately high heritability estimates for resistance to Epilachna varivestis were obtained. Yield had the lowest heritability and seed size the highest. Inheritance...

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