Plant Pathology Commons^™

Development Of A Standardized Soybean Cyst Nematode Screening Assay In Pennycress And Identification Of Resistant Germplasm, Pawan Basnet, Clinton G. Meinhardt, Bishnu Dhital, Alice Nguyen, Jason D. Gillman, Trupti Joshi, Melissa G. Mitchum, Andrew M. Scaboo

Biomedical Sciences

The prospect of incorporating pennycress as an oilseed cover crop in the Midwest’s corn-soybean rotation system has drawn researcher and farmer attention. The inclusion of pennycress will be beneficial as it provides an excellent soil cover to reduce soil erosion and nutrient leaching while serving as an additional source for oilseed production and income. However, pennycress is an alternative host for soybean cyst nematode (SCN), which is a major biological threat to soybean that needs to be addressed for sustainable pennycress adoption into our current production systems. To develop a standardized SCN resistance screening strategy in pennycress, we tested and …

Epistatic Interaction Between Rhg1‑A And Rhg2 In Pi 90763 Confers Resistance To Virulent Soybean Cyst Nematode Populations, Pawan Basnet, Clinton G. Meinhardt, Mariola Usovsky, Jason D. Gillman, Trupti Joshi, Qijian Song, Brian Diers, Melissa G. Mitchum, Andrew M. Scaboo

Biomedical Sciences

Key message

An epistatic interaction between SCN resistance loci rhg1-a and rhg2 in PI 90763 imparts resistance against virulent SCN populations which can be employed to diversify SCN resistance in soybean cultivars.

Abstract

With more than 95% of the $46.1B soybean market dominated by a single type of genetic resistance, breeding for soybean cyst nematode (SCN)-resistant soybean that can effectively combat the widespread increase in virulent SCN populations presents a significant challenge. Rhg genes (for Resistance to Heterodera glycines) play a key role in resistance to SCN; however, their deployment beyond the use of the rhg1-b allele has been …

Flora And Vegetation Of The Meadow River Wetlands, Greenbrier County, West Virginia, Alan Edward Brant

Theses, Dissertations and Capstones

The Meadow River wetlands comprise the second largest wetland complex within the state of West Virginia, containing approximately 3131 acres (1392 ha) of swamp and wet meadow (Evans et al. 1982). Plant collecting within this complex as determined by available literature and herbarium specimens has been limited in the past and apparently dealt only with the wetlands near the head of Otter Creek. Grafton et al. (1982) conducted walk-through surveys in conjunction with a statewide wetland survey and the West Virginia Department of Highways performed a rather detailed vegetation analysis in the same area as part of an environmental impact …

A Biosystematic Study Of The Polemonium Reptans L. Complex In The Eastern United States Including P. Reptans L. Var. Reptans, P. Reptans L. Var. Villosum Braun And Related Taxa (Polemoniaceae), Bill Lucas

Theses, Dissertations and Capstones

The taxonanic relationship of Polemoniun reptans L. var. reptans and P. reptans L. var. villosum Braun (Polemoniaceae) is examined in this studly. The former taxon occurs throughout most of the eastern deciduous forest while the latter is rare and limited to southern Ohio and northcentral Kentucky. The natural coherence of the species has provided a bimodal frequency distribution which displays clustering of the two varieties at opposite ends of a continuum. Significant differences were obtained using the BMDP7M multivariate analysis (0.05 level of significance) based on morphometric information gathered from herbarium specimens throughout the midwest and eastern states, between var. …

Variation In Leaf Anatomy In Ten Selected Species Of Carex (Cyperaceae) Representing Three Subgeneric Sections (Bracteosae, Multiflorae, And Squarrosae), Marion Rae Mallory

Theses, Dissertations and Capstones

Leaves of Carex (Cyperaceae) representing three subgeneric sections were collected from wide spread localities and observed for anatomical variation. Among the quantitative characters evaluated were, epidermal cell height, width, and number per unit area, bulliform cell height and width, ai r cavity length, width, and number per unit area, and number of stomata per unit area. some descriptive anatomical characters were leaf and keel shape, air cavity shape, sclerenchyma pattern, vascular bundle location, presence or absence of a hypodermis, nature of the mesophyll, silica body shape and location, presence or absence of epidermal projections, stomatal pattern, and subsidiary cell shape.

Vascular Vegetation And Flora Of Remnant Forest In The Ohio River Floodplain Between The Great Kanawha And Big Sandy Rivers, West Virginia, John Carl Furry

Theses, Dissertations and Capstones

A total of 246 species of vascular plants representing 75 families were recorded from six physiographically defined forest types in the Ohio River floodplain between the Greet Kanawha end Big Sandy Rivers, West Virginia. Distinct woodlands were those associated with the River flats, River front, bottoms of secondary streams, stream banks, the high floodplain end swamps. Only two species, Acer saccharinum and Platenus occidentalis representing 0.81 percent of the total species encountered, were present in all forest types; 105 species (42.7 percent) were restricted to one forest type. Fifty-five species were new additions to the flora of one or more …

A Study Of Vascular Plants On Rock Outcrops In Southwestern West Virginia, Sheila Kay Adkins Zeto

Theses, Dissertations and Capstones

A total of 223 species of vascular plants representing 66 families were collected from rock outcrops at five study sites in Cabell, Wayne and Lincoln Counties, southwestern West Virginia. Eighteen species (8.07 percent) were present at all five sites with little regard for site conditions. One hundred seventeen species (52,4 percent) were restricted to only one of the five sites. The outcrop flora included nine species (5.03 percent) that are considered introduced elements, Forty-eight species were new additions to the flora of one or more of the counties studied, Floristic similarity coefficients of five sites range .from .347 to .512. …