Abstract
Charcoal rot, caused by Macrophomina phaseolina, significantly reduces yield in soybean more than most other diseases in the midsouthern United States. There are no commercial genotypes marketed as resistant to charcoal rot. Reactions of 27 maturity group (MG) III, 29 Early MG IV, 34 Late MG IV, and 59 MG V genotypes were evaluated for M. phaseolina between 2006 and 2008 in a non-irrigated, no-till field that had been artificially infested for three years. There was significant variation in root colonization among genotypes and years, indicating the value of screening genotypes over multiple years. Based on CFUI there was no genotype that was consistently immune to charcoal rot each year. However, there were a total of six genotypes (one genotype in MG III, one in Late MG IV, and four in MG V) that were identified as moderately resistant. Some of the commercial and public genotypes were resistant to M. phaseolina at levels equal to or greater than the standard DT97-4290, a moderately resistant cultivar. The genotypes identified as having moderate resistance across the three years could be useful as sources for developing resistant soybean genotypes. Accepted for publication 27 July 2011. Published 26 September 2011.
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Claims 5
Claim · model-written summary
Root colonization varied significantly among genotypes and years.
- Taxon
- soybean
Glycine maxt0 - Material
- genotypese0
- Interactor
- Macrophomina phaseolina
Macrophomina phaseolinae0 - Outcome
- root colonizatione0
- Direction
- variatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Charcoal rot, caused by Macrophomina phaseolina, significantly reduces yield in soybean more than most other diseases in the midsouthern United States. There are no commercial genotypes marketed as resistant to charcoal rot. Reactions of 27 maturity group (MG) III, 29 Early MG IV, 34 Late MG IV, and 59 MG V genotypes were evaluated for M. phaseolina between 2006 and 2008 in a non-irrigated, no-till field that had been artificially infested for three years. There was significant variation in root colonization among genotypes and years”
t0“Soybean Genotypes for Resistance to Charcoal Rot”
Claim · model-written summary
No genotype was consistently immune to charcoal rot each year.
- Taxon
- soybeanGlycine maxt0
- Outcome
- no genotype that was consistently immune to charcoal rot each yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no genotype that was consistently immune to charcoal rot each year”
t0“Soybean Genotypes for Resistance to Charcoal Rot”
Claim · model-written summary
Six genotypes were moderately resistant.
- Taxon
- soybeanGlycine maxt0
- Material
- genotypese0
- Outcome
- moderately resistante0
- Value
- six genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a total of six genotypes (one genotype in MG III, one in Late MG IV, and four in MG V) that were identified as moderately resistant”
t0“Soybean Genotypes for Resistance to Charcoal Rot”
Claim · model-written summary
Some commercial and public genotypes had resistance equal to or greater than DT97-4290.
- Taxon
- soybeanGlycine maxt0
- Material
- commercial and public genotypese0
- Interactor
- M. phaseolinaMacrophomina phaseolinae0pathogen
- Outcome
- resistant to M. phaseolinae0
- Direction
- equal to or greater thane0
- Comparator
- DT97-4290e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some of the commercial and public genotypes were resistant to M. phaseolina at levels equal to or greater than the standard DT97-4290”
t0“Soybean Genotypes for Resistance to Charcoal Rot”
Claim · model-written summary
Moderately resistant genotypes could be useful for developing resistant soybean genotypes.
- Taxon
- soybeanGlycine maxe0
- Outcome
- sources for developing resistant soybean genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genotypes identified as having moderate resistance across the three years could be useful as sources for developing resistant soybean genotypes”