VTechWorks Repository :: Browsing by Author "Rucker, Elizabeth"

Browsing by Author "Rucker, Elizabeth"

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The 2008 Virginia Corn Silage Hybrid Trials
Jones, Brian Paul; Behl, Harry D.; Rucker, Elizabeth; Thomason, Wade E. (Virginia Cooperative Extension, 2008)
Discusses the results of performance trials from commercial corn hybrids produced for silage at four Virginia locations in 2008.
Fine mapping of a quantitative resistance gene for gray leaf spot of maize (Zea mays L.) derived from teosinte (Z-mays ssp parviglumis)
Zhang, Xinye; Yang, Qin; Rucker, Elizabeth; Thomason, Wade E.; Balint-Kurti, Peter J. (2017-06)
In this study we mapped the QTL Qgls8 for gray leaf spot (GLS) resistance in maize to a similar to 130 kb region on chromosome 8 including five predicted genes. In previous work, using near isogenic line (NIL) populations in which segments of the teosinte (Zea mays ssp. parviglumis) genome had been introgressed into the background of the maize line B73, we had identified a QTL on chromosome 8, here called Qgls8, for gray leaf spot (GLS) resistance. We identified alternate teosinte alleles at this QTL, one conferring increased GLS resistance and one increased susceptibility relative to the B73 allele. Using segregating populations derived from NIL parents carrying these contrasting alleles, we were able to delimit the QTL region to a similar to 130 kb (based on the B73 genome) which encompassed five predicted genes.
Genotypic and phenotypic characterization of a large, diverse population of maize near-isogenic lines
Morales, Laura; Repka, A. C.; Swarts, Kelly L.; Stafstrom, William C.; He, Yijian; Sermons, Shannon M.; Yang, Qin; Lopez-Zuniga, Luis O.; Rucker, Elizabeth; Thomason, Wade E.; Nelson, Rebecca J.; Balint-Kurti, Peter J. (2020-08)
Genome-wide association (GWA) studies can identify quantitative trait loci (QTL) putatively underlying traits of interest, and nested association mapping (NAM) can further assess allelic series. Near-isogenic lines (NILs) can be used to characterize, dissect and validate QTL, but the development of NILs is costly. Previous studies have utilized limited numbers of NILs and introgression donors. We characterized a panel of 1270 maize NILs derived from crosses between 18 diverse inbred lines and the recurrent inbred parent B73, referred to as the nested NILs (nNILs). The nNILs were phenotyped for flowering time, height and resistance to three foliar diseases, and genotyped with genotyping-by-sequencing. Across traits, broad-sense heritability (0.4-0.8) was relatively high. The 896 genotyped nNILs contain 2638 introgressions, which span the entire genome with substantial overlap within and among allele donors. GWA with the whole panel identified 29 QTL for height and disease resistance with allelic variation across donors. To date, this is the largest and most diverse publicly available panel of maize NILs to be phenotypically and genotypically characterized. The nNILs are a valuable resource for the maize community, providing an extensive collection of introgressions from the founders of the maize NAM population in a B73 background combined with data on six agronomically important traits and from genotyping-by-sequencing. We demonstrate that the nNILs can be used for QTL mapping and allelic testing. The majority of nNILs had four or fewer introgressions, and could readily be used for future fine mapping studies.
Producing Virginia's small grains for human consumption
Stadler, Kathleen M.; Brann, Daniel Edward, 1945-; Rucker, Elizabeth (Virginia Cooperative Extension, 2000)
Registration of 'Hilliard' wheat
Griffey, Carl A.; Malla, Subas; Brooks, Wynse S.; Seago, John E.; Christopher, Anthony; Thomason, Wade E.; Pitman, Robert M.; Markham, Robin; Vaughn, Mark E.; Dunaway, David W.; Beahm, Mary; Barrack, C. Lin; Rucker, Elizabeth; Behl, Harry D.; Hardiman, Thomas H.; Beahm, Bruce R.; Browning, Phillip; Schmale, David G. III; McMaster, Nicole J.; Custis, J. Tommy; Gulick, Steve; Ashburn, S. Bobby; Jones, Ned, Jr.; Baik, Byung-Kee; Bockelman, Harold; Marshall, David; Fountain, Myron O.; Brown-Guedira, Gina L.; Cowger, Christina; Cambron, Sue; Kolmer, James; Jin, Yue; Chen, Xianming; Garland-Campbell, Kimberly; Sparry, Ellen (2020-09)
'Hilliard' (Reg. no. CV-1163, PI 676271), a soft red winter (SRW) wheat (Triticum aestivum L.) developed and tested as VA11W-108 by the Virginia Agricultural Experiment Station, was released in March 2015. Hilliard was derived from the cross '25R47'/'Jamestown'. Hilliard is widely adapted, from Texas to Ontario, Canada, and provides producers with a mid-season, medium height, awned, semi-dwarf (Rht2) cul tivar that has very high yield potential, good straw strength, and intermediate grain volume weight and quality. It expresses moderate to high levels of resistance to most diseases prevalent in the eastern United States and Ontario. In the 2016-2018 USDA-ARS Uniform SRW Wheat nurseries, Hilliard ranked first in grain yield in the southern nursery across all 3 yr (5,147-5,758 kg ha(-1)). In the uniform eastern nursery, it ranked first for grain yield in 2016 (6,159 kg ha(-1)) and 2017 (5,633 kg ha(-1)) and second in 2018 (5,515 kg ha(-1)). Grain volume weights of Hilliard were similar to overall trial averages in the uniform southern (73.4-75.2 kg hl(-1)) and eastern (70-75.8 kg hl(-1)) nurseries. Hilliard has soft grain texture with flour softness equivalent values varying from 58.1 to 61.7 g 100 g(-1). Straight grade flour yields on a Quadrumat Senior mill varied from 66.8 to 68.4 g kg(-1). Flour protein concentration varied from 7.0 to 9.1 g 100 g(-1) and gluten strength from 108 to 128 g 100 g(-1), as measured by lactic acid solvent retention capacity. Cookie spread diameter varied from 18.3 to 18.6 cm.
Registration of 'SB255' winter barley
Brooks, Wynse S.; Griffey, Carl A.; Vaughn, Mark E.; Seago, John E.; Thomason, Wade E.; Fitzgerald, Joshua; Christopher, Anthony; Pitman, Robert M.; Dunaway, David W.; Light, Jon; Rucker, Elizabeth; Behl, Harry D.; Beahm, Bruce R.; Browning, Phillip; McMaster, Nicole J.; Schmale, David G. III; Hardiman, Thomas H.; Custis, J. Tommy; Gulick, Steve; Ashburn, S. Bobby; Jones, Ned, Jr.; Marshall, David; Fountain, Myron O.; Tan Tuong; Oakes, Joseph C. (2021-05)
'SB255' (Reg. no. CV-373, PI 693987) is a six-rowed hulled barley (Hordeum vulgare L.) cultivar with winter growth habit. The cultivar was released by the Virginia Agricultural Experiment Station in May 2019. SB255 is widely adapted, high yielding, high grain volume weight, and medium tall. It has good winterhardiness and good straw strength. The spikes of SB255 are strap and slightly waxy with no overlapping lateral kernels and with long awns. Prior to being named, SB255 was tested under the experimental designation VA11B-141 (LA). It was derived from the cross Spont03-44/VA01B-44 and developed using a modified-bulk breeding method. It was evaluated from 2013 to 2019 in the Virginia Official Variety Trials at five to six locations. SB255's average grain yield (5,214 kg ha(-1)) was similar to the check cultivars 'Secretariat' and 'Thoroughbred' but significantly (P <= .05) higher than 'Atlantic', 'Price', 'Callao', 'Nomini', and 'Wysor'. Average grain volume weight of SB255 (60.8 kg hL(-1)) was similar to Secretariat and Price but exceeded (P <= 0.05) those of Thoroughbred, Atlantic, Callao, Nomini, and Wysor. Head emergence of SB255 was similar to Thoroughbred and 2-5 d later than winter feed barley cultivars Secretariat, Atlantic, Price, Callao, and Nomini. SB255 was developed primarily as a feed barley cultivar. It provides barley producers and end users in the eastern United States with a high-grain-yielding cultivar having good to moderate resistance to all diseases prevalent in the eastern United States, including Fusarium head blight (FHB), and also lower deoxynivalenol (DON) accumulation in the grain.
Registration of 'Secretariat' Winter Barley
Griffey, Carl A.; Brooks, Wynse S.; Vaughn, Mark E.; Berger, Gregory L.; Thomason, Wade E.; Pitman, Robert M.; Malla, Subas; Seago, John E.; Dunaway, David W.; Rucker, Elizabeth; Behl, Harry D.; Browning, Phillip; Schmale, David G. III; McMaster, Nicole J.; Hardiman, Thomas H.; Custis, J. Tommy; Starner, David Eugene; Gulick, Steve; Ashburn, S. Bobby; Jones, E. H.; Marshall, David; Fountain, Myron O.; Tuong, Tan Duy; Kurantz, Michael J.; Moreau, Robert A.; Hicks, Kevin B. (2016-08-30)
‘Secretariat’ (Reg. No. CV-359, PI 673931) is a six-row hulled winter barley (Hordeum vulgare L.) developed by the Virginia Agricultural Experiment Station and released in May 2014. Secretariat, formerly designated VA08B-85, was derived from the cross VA00B-199/VA00B-259 and developed using a modified bulk breeding method. It was evaluated from 2012 to 2015 in the Virginia Official Variety Trials at five to six locations. Secretariat’s average grain yield (5907 kg ha−1) was higher than the check cultivars ‘Atlantic’, ‘Price’, ‘Callao’, ‘Nomini’, and ‘Wysor’ and similar to ‘Thoroughbred’. Average grain volume weight of Secretariat (61.1 kg hL−1) was similar to Thoroughbred, Atlantic, Price, and Callao and higher than Nomini and Wysor. Head emergence of Secretariat is 6 d earlier than the predominant cultivar Thoroughbred. Earlier maturity is a primary factor determining whether barley or wheat (Triticum aestivum L.) is used in double-cropping systems with soybean [Glycine max (Merr.) L.]. Grain of Secretariat produced an average starch concentration (56.9%) that was higher than Price and Callao, similar to Atlantic, but lower than Thoroughbred. Secretariat provides barley producers and end users in the eastern United States with a high-yielding, widely adapted, early-maturing winter barley cultivar that has good grain quality and is highly resistant to leaf rust (caused by Puccinia hordei G. Otth) and powdery mildew [caused by Blumeria graminis (DC.) E.O. Speer f. sp. hordei Em. Marchal].
Small Grain Forage Variety Testing, 2018
Thomason, Wade E.; Lael, Brad; Rucker, Elizabeth (Virginia Cooperative Extension, 2018-07-20)
For the 2017-2018 growing season, a forage production trial for small grains was conducted at the Northern Piedmont AREC. Cultivars of barley, oats, rye, triticale, and wheat were tested for forage yield and maturation rate.
Small Grain Forage Variety Testing, 2019
Thomason, Wade E.; Lillard, Greg; Rucker, Elizabeth (Virginia Cooperative Extension, 2019-07-15)
For the 2018-2019 growing season, a forage production trial for small grains was conducted at the Northern Piedmont AREC. Cultivars of barley, oats, rye, triticale, and wheat were tested for forage yield and maturation rate.
Small Grain Forage Variety Testing, 2020
Thomason, Wade E.; Rucker, Elizabeth (Virginia Cooperative Extension, 2020-07-01)
A forage production trial of commercial barley, oats, rye, triticale, and wheat cultivars has been conducted yearly from 1994-2020 at the Northern Piedmont AREC, Orange. Results from the 2019-20 crop season are presented in this report.
Small Grains in 1994
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Price, Allen; Rucker, Elizabeth; Behl, Harry D.; Stromberg, Erik L.; Keister, Judy (Virginia Cooperative Extension, 2009-06-10)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 1995
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Price, Allen; Rucker, Elizabeth; Behl, Harry D.; Keister, Judy (Virginia Cooperative Extension, 2009-06-10)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 1996
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Rucker, Elizabeth; Behl, Harry D.; Das, Modan; Pridgen, Thomas H., 1957-; Keister, Judy (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 1997
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Das, Modan; Pridgen, Thomas H., 1957-; Keister, Judy (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 1998
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 1999
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 2000
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 2001
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 2002
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.
Small Grains in 2003
Brann, Daniel Edward, 1945-; Griffey, Carl A.; Behl, Harry D.; Rucker, Elizabeth; Pridgen, Thomas H., 1957- (Virginia Cooperative Extension, 2009-05-01)
Discusses test results for several varieties of barley and wheat grown in Virginia. Presents yield performance data for each variety for the year and also averaged for several years.