A5061979842- Turfgrass Adaptation and Management
- Rangeland and Wildlife Management
- Seedling growth and survival studies
- Insect-Plant Interactions and Control
- Plant tissue culture and regeneration
- Insect Resistance and Genetics
- Plant Disease Resistance and Genetics
- Plant Genetic and Mutation Studies
- Wheat and Barley Genetics and Pathology
- Plant Reproductive Biology
- Yeasts and Rust Fungi Studies
- Chromosomal and Genetic Variations
- Agricultural Practices and Plant Genetics
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Plant Pathogens and Resistance
- Transgenic Plants and Applications
- Agriculture, Soil, Plant Science
- Plant and animal studies
- Botany, Ecology, and Taxonomy Studies
- Plant Virus Research Studies
- Flowering Plant Growth and Cultivation
- Plant Disease Management Techniques
- GABA and Rice Research
- Plant Taxonomy and Phylogenetics
Research Institute of Dallas
2014-2023
Texas A&M University System
2009-2016
Texas A&M University
1982-2013
Kansas State University
2011
Pfizer (United States)
1990
DeKalb Medical Center
1990
The objectives of the present study were to confirm Chinese reports haploid plant production from corn microspores via anther culture and further define conditions for improved efficiency. Various genotypes (both U.S.A.), media cold‐shock pretreatments tassels evaluated. basal medium, designated Yu‐pei, was modified test various organic inorganic additives. Variations in degree duration cold pretreatment studied. Highly significant differences anthers responding with calli or embryoids found...
Rice ( Oryza sativa L. subsp. japonica ) panicles containing pollen at the G 1 2 , early binucleate, and late binucleate stages of development were subjected to 5, 10, 13 C temperatures for 3, 7, 14, 21 days before placing anthers on callus‐inducing medium. The uninucleate gave much higher frequencies callus induction in both control treated samples. In general, more moderate temperature over a 10‐ 14‐day treatment maximum frequency induction. While most plants derived from stage stored cold...
A 3-year study was conducted to evaluate the comparative performance of zoysiagrass ( Zoysia spp .) cultivars for shaded environments in which inputs are minimized. Included were commercial Diamond, Cavalier, Royal, Shadow Turf, Zorro, Zeon, Jamur, Crowne, Palisades, and Meyer. In July 2006, grass plugs planted a shade nursery comprised live oak trees providing 89% shade. From 2007 2009, turf plots periodically evaluated quality, density, color, vertical canopy height, extent lateral spread....
Auxotrophs in three different races of Pyricularia oryzae were obtained following ultraviolet mutagenesis, and tested for complementarity on minimal medium. Prototrophic growth resulted between combinations auxotrophs single strains, but not strains. The did result form crossfeeding, required at least transitory heterokaryosis. Putative diploids, i.e., large prototrophic conidia, readily isolated from the heterokaryons. In addition, conidia with nearly every possible combination parental...
Zoysiagrass (Zoysia spp.), belonging to the genus Zoysia in subfamily Chloridoideae, is widely used domestic lawns, sports fields and as forage. We constructed high-density genetic maps of japonica using a restriction site-associated DNA sequencing (RAD-Seq) approach an F1 mapping population derived from cross between 'Carrizo' 'El Toro'. Two linkage were constructed, one for each parents. A map consisting 2408 RAD markers distributed on 21 groups was 'Carrizo'. Another with 1230 mapped 20...
Zoysia matrella, widely used in lawns and sports fields, is of great economic ecological value. Z. matrella an allotetraploid species (2n = 4x 40) the genus zoysia under subfamily Chloridoideae. Despite its impacts importance, Chloridoideae has received little attention genomics studies. As a result, limited genetic genomic information are available for this subfamily, which have impeded progress understanding evolutionary history grasses important lineage. The lack high-resolution map...
ABSTRACT Zoysiagrasses ( Zoysia spp.) are widely adapted and highly variable; however, information is lacking regarding the heritability potential for improvement of numerous performance characteristics. Three individual replicated field studies, which included 90 very fine, 108 126 coarse‐textured zoysiagrass genotypes, respectively, were conducted near Gainesville, FL, to determine response broad‐sense heritabilities 10 turfgrass stress‐related Genotypic variance largely contributed wide...
Little is known about the variation of 2C nuclear DNA content in zoysiagrass ( Zoysia Willd.). Therefore, a glasshouse study including 20 cultivars and 16 experimental genotypes japonica Steud., Z. macrantha Desv., matrella (L.) Merr., minima (Colenso) Zotov, pacifica (Goudswaard) M. Hotta & Kuroki, pauciflora Mez, select interspecific hybrids was conducted 2008 at Gainesville, FL. Nuclei were stained with propidium iodide, flow cytometry (FCM) analysis laser cytometer. Genotypes from...
'DALSA 0605' (Reg. No. CV-274, PI 671959) is an embryo rescue-derived interploid hybrid of St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] resulting from a cross between TAES 5382 (African triploid 291594) and 'Palmetto' (diploid). DALSA 0605 was evaluated under the designation 5471-18 TXSA 19 approved for release as new cultivar by Texas A&M AgriLife in 2014. vegetatively propagated, genetically stable, uniform cultivar. It distinguished other cultivars traits characteristics...
KSUZ 0802 (Reg. No. CV‐282, PI 678793) is a fine‐textured, cold‐tolerant zoysiagrass ( Zoysia spp.) hybrid co‐developed and jointly released by Texas A&M AgriLife Research, Dallas, TX, the Kansas Agricultural Experiment Station, Manhattan, KS. an F 1 interspecific developed in 2001 from cross between matrella (L). Merr. ‘Cavalier’ ecotype of Z. japonica Steud. named Anderson 1, derivative ‘Chinese Common’. After years testing (2004 –2008) for turf quality winter survival at KS, was...
ABSTRACT Molecular tools have not identified markers for host‐plant resistance to fall armyworm [ Spodoptera frugiperda (J. E. Smith)], one of the most damaging insect pests in turfgrasses southeastern United States. Available quantitative trait loci (QTL) maize ( Zea mays L.) further been assessed utility as comparative across related taxa. This study reports a linkage map region conferring major control zoysiagrass Zoysia spp.). One genomic simple sequence repeat (ZgAg136) and amplified...
St. augustinegrass [ Stenotaphrum secundatum (Walt.) Kuntze] is considered to be one of the most shade-tolerant warm-season turfgrasses, yet information lacking on intraspecies developmental responses and performance in shade. This greenhouse study was conducted 1) compare quality, development, physiological 10 commercial experimental lines st. moderate heavy [32% 15% photosynthetic photon flux ( PPF ), respectively] shade environments’ 2) evaluate morphological indicators that could used...
Zoysiagrass ( Zoysia spp.) grown under shade on golf courses and in home lawns is slow to recover from damage declines quality over time. We evaluated stolon growth tillering of ‘Meyer’ Chinese Common (both Z. japonica Steud.); ‘Zorro’, ‘Diamond’, ‘Cavalier’ [all matrella L. (Merr.)]; ‘Emerald’ × pacifica Goudsw.); six experimental progeny reciprocal crosses silver maple Acer saccharinum L.) full sun 2008 2009 Manhattan, KS. A single 6-cm diameter plug was planted the center 1.2 m 1.2-m...
Abstract ‘DALZ 1701’ (Reg no. CV‐292, PI 702798) is a third‐generation hybrid resulting from mating interspecific ‘TAES 5723‐47’ with Zoysia japonica (Steud.) ‘ Meyer’. In the 2019 National Evaluation Turfgrass Program, which ran to 2022 in 15 locations, DALZ 1701 was put test. 9 of 13 established more quickly than Meyer, similarly Emerald and Zeon but slower Empire. 1701's turfgrass quality generally better Meyer's on par that Emerald, Empire, Zeon. Compared displays dark green genetic...
Abstract ‘DALZ 1308’ (Reg. no. CV‐285, PI 691612) is a first‐generation interspecific hybrid developed in 2004 by crossing genotype of Zoysia minima (Colenso) Zotov and Z. matrella (L.) Merr. ‘Diamond.’ After field evaluations Dallas, TX (2004–2009) Gainesville, FL (2006–2008), DALZ 1308 was selected for advancement to the 2013 Warm‐season Putting Greens National Turfgrass Evaluation Program (NTEP). evaluated at 10 NTEP locations (2013–2018) as well (2014–2017) (2013–2017). exhibited...
‘Chisholm’ (Reg. No. CV-273, PI 666039) is a zoysiagrass (Zoysia japonica Steud.) approved for release by Texas A&M AgriLife Research, Dallas, TX, and the Kansas Agricultural Experiment Station, Manhattan, KS. Chisholm clonal selection made in 1997 from germplasm nursery established 1983 Dallas. It was originally evaluated under designation TAES 4436 included 2002 National Turfgrass Evaluation Program Zoysiagrass Variety Test DALZ 0102. has texture coarser than ‘Meyer’ intermediate to...
The objective of this study was to develop a reliable and high throughput screening method evaluate the response St. Augustine grass ( Stenotaphrum secundatum ) genotypes grey leaf spot (GLS) caused by Magnaporthe oryzae infection. Whole plant, detached stolon assays under growth chamber conditions were compared field on eight commercial nine advanced breeding lines grass. Disease assessed using two variables, lesion size (LS) overall plant disease severity (SEV). LS SEV highly correlated...
St. Augustinegrass [ Stenotaphrum secundatum (Walt.) Kuntze] is a popular warm‐season turfgrass in Gulf Coast regions of the United States. Diploid produces fertile seed, but triploids and higher polyploids are mostly sterile. Polyploid cultivars have been selected for their resistance to southern chinch bugs, Augustine Decline, drought tolerance lack cold hardiness shade diploids. However, because sterility barriers, polyploid germplasm had not fully used as breeding material until 2009...
Abstract ‘DALSA 1618’ (Reg. no. CV‐291, PI 702594) is a first‐generation intraspecific St. Augustinegrass [ Stenotaphrum secundatum (Walt.) Kuntze] hybrid developed by Texas A&M AgriLife Research in Dallas, TX, from cross between drought‐resistant polyploid female parent, TAES 5384 (PI 300130, GRIN National Plant Germplasm System), and semi‐dwarf shade‐tolerant diploid pollen donor, ‘Amerishade’. DALSA 1618 was formerly tested as ‘TAES 5896‐09’ ‘TXSA‐156’. Superior performance quality...