Sugarcane Mosaic Virus Strain Maize Dwarf Mosaic Virus B as a Pathogen of Eastern Gamagrass

Seifers, D. L.; Handley, Mary K.; Bowden, Robert L.

doi:10.1094/pd-77-0335

Cited by 11 publications

(2 citation statements)

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“…We also suggest future persistence studies utilize multiple environments that include phenotyping for disease and pest resistance. Although eastern gamagrass has been considered to have few diseases and pest issues, there have been reports of infestation by aphids ( Rhopalosiphum maidis ) that could lead to infection with maize dwarf mosaic virus (MDMV) and sugarcane mosaic virus (SCMV‐MDMV‐B) (Seifers et al., 1993). Larvae of southern cornstalk borer have also been shown to infest culms of eastern gamagrass (Springer & Dewald, 2004; Springer et al., 2011) and even reduce stands of eastern gamagrass grown in Maryland (Krizek et al., 2003).…”

Section: Resultsmentioning

confidence: 99%

Is it feasible to improve stand persistence of eastern gamagrass (Tripsacum dactyloides L.) through breeding?

Boerman

Moffet

Gunter

2023

Agrosystems Geosci & Env

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Eastern gamagrass is a warm‐season perennial grass that has excellent forage nutritional quality and a broad range of adaptations. Despite the favorable forage qualities, agronomic issues persist; most important for grazing systems is stand persistence from preferential grazing when growing in mixed species communities. Stand persistence when monoculture stands are grazed has been previously studied, and it has been observed that stands decline under high stocking rates or low grazing height. The objective of our study was to evaluate if an improvement of stand persistence under defoliation to a low‐cut height is feasible through the breeding of improved lines. A persistence trial was conducted using a completely random design and eight replications to evaluate the stand persistence of two commercial cultivars, two experimental lines, and an ecotype selection. Defoliation occurred by grazing and mowing to a height of 8 cm three‐to‐four times over the course of five growing seasons. Stand counts of live plants were taken following the final defoliation of the season. Mixed linear regression modeling indicates significant differences between genotypes developed in years where no grazing occurred. An ecotype selection from Northwest Oklahoma exhibited significantly greater persistence than the cultivar Pete and the other experimental lines. These results suggest that different alleles exist for critical persistence genes, indicating it may be feasible to improve the trait through breeding and selection.

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Section: Resultsmentioning

confidence: 99%

Is it feasible to improve stand persistence of eastern gamagrass (Tripsacum dactyloides L.) through breeding?

Boerman

Moffet

Gunter

2023

Agrosystems Geosci & Env

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“…One problem is disease. Infection by maize dwarf mosaic virus B has been very serious in plots at The Land Institute (Seifers et al, 1993). Also, the hard fruitcase of Tripsacum weighs almost three times as much as the seed itself and makes processing difficult.…”

Section: Eastern Gamagrassmentioning

confidence: 99%

Breeding Perennial Grain Crops

Cox

Bender

Picone

et al. 2002

BPTS

161

113

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Abstract:One-third of the planet's arable land has been lost to soil erosion in recent decades, and the pace of this degradation will increase as the limits of our food-production capacity are stretched. The persistent problem of worldwide soil erosion has rekindled interest in perennial grain crops. All of our current grain crops are annuals; therefore, developing an array of new perennial grains -grasses, legumes, and others -will require a long-term commitment. Fortunately, many perennial species can be hybridized with related annual crops, allowing us to incorporate genes of domestication much more quickly than did our ancestors who first selected the genes. Some grain crops -including rye, rice, and sorghum -can be hybridized with close perennial relatives to establish new gene pools. Others, such as wheat, oat, maize, soybean, and sunflower, must be hybridized with more distantly related perennial species and genera. Finally, some perennial species with relatively high grain yields -intermediate wheatgrass, wildrye, lymegrass, eastern gamagrass, Indian ricegrass, Illinois bundleflower, Maximilian sunflower, and probably others -are candidates for direct domestication without interspecific hybridization. To ensure diversity in the field and foster further genetic improvement, breeders will need to develop deep gene pools for each crop. Discussions of breeding strategies for perennial grains have concentrated on allocation of photosynthetic resources between seeds and vegetative structures. But perennials will likely be grown in more diverse agro-ecosystems and require arrays of traits very different from those usually addressed by breeders of annuals. The only way to address concerns about the feasibility of perennial grains is to carry out breeding programs with adequate resources on a sufficient time scale. A massive program for breeding perennial grains could be funded by diversion of a relatively small fraction of the world's agricultural research budget.

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