Abstract
Based on the negative relationship between lignin and digestibility, one of the most effective means of increasing forage digestibility is by reducing lignin content. Our objective was to chemically induce a brown‐midrib (bmr) mutation in pearl millet, Pennisetum americanum (L.) Leeke, and evaluate the resulting mutants for lignin content and similarity to existing bmr mutants in other species. Seeds from two inbred pearl millet lines derived from Tift 23D 2 B 1 /2 ✕ PI 185642 were treated with either ethyl methyl sulfonate or diethyl sulfate, planted, and selfed in 1984. In 1985 a single plant in one head row exhibited a brown‐midrib phenotype, and was selfed. The bmr pearl millet was compared to selfed normal plants from the same head row along with bmr and normal sorghum, Sorghum bicolor (L.) Moench., and maize, Zea mays L., in 1986 at two locations. Plants were harvested at anthesis and analyzed for apparent in vitro dry matter digestibility (IVDMD), permanganate lignin, alkali‐labile phenolics, and other quality parameters. Lignin concentration in bmr pearl millet was 40 g kg −1 compared to 50 g kg −1 for its normal counterpart, and IVDMD was 726 g kg −1 for the bmr genotype compared to 659 g kg −1 for the normal genotype. The differences in phenolic monomer concentrations between normal and bmr pearl millet were more like those in sorghum than maize. Based on IVDMD, lignin and phenolic monomer analyses, we concluded that bmr pearl millet was similar phenotypically to bmr mutants in sorghum. This trait has excellent potential for improving the quality of forage pearl millet.
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Claims 6
Claim · model-written summary
A brown midrib phenotype appeared in one pearl millet plant.
- Taxon
- Pearl Millet
Cenchrus americanust0 - Outcome
- brown‐midrib phenotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1985 a single plant in one head row exhibited a brown‐midrib phenotype”
t0“Pearl Millet”
Claim · model-written summary
Brown midrib pearl millet had lower lignin concentration than normal plants, 40 versus 50 g kg −1.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- bmr pearl millete0
- Outcome
- Lignin concentratione0
- Direction
- lowerinferrede0
- Value
- 40 g kg −1e0
- Comparator
- normal counterparte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lignin concentration in bmr pearl millet was 40 g kg −1 compared to 50 g kg −1 for its normal counterpart”
Claim · model-written summary
Brown midrib pearl millet had higher digestibility than normal plants, 726 versus 659 g kg −1.
- Taxon
- pearl milletCenchrus americanust0
- Material
- bmr genotypee0
- Outcome
- IVDMDe0
- Direction
- higherinferrede0
- Value
- 726 g kg −1e0
- Comparator
- normal genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IVDMD was 726 g kg −1 for the bmr genotype compared to 659 g kg −1 for the normal genotype”
t0“pearl millet”
Claim · model-written summary
Pearl millet phenolic monomer differences resembled sorghum more than maize.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- bmr pearl millete0
- Outcome
- differences in phenolic monomer concentrationse0
- Direction
- more likee0
- Comparator
- sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences in phenolic monomer concentrations between normal and bmr pearl millet were more like those in sorghum than maize.”
Claim · model-written summary
Brown midrib pearl millet was phenotypically similar to sorghum mutants.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- bmr pearl millete0
- Outcome
- similar phenotypicallye0
- Comparator
- bmr mutants in sorghume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we concluded that bmr pearl millet was similar phenotypically to bmr mutants in sorghum.”
Claim · model-written summary
The brown midrib trait has potential to improve forage pearl millet quality.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- improving the quality of forage pearl millete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This trait has excellent potential for improving the quality of forage pearl millet.”