Helms T.C.,Dep. of Plant science |
Scott R.A.,U.S. Department of Agriculture |
Schapaugh W.T.,Kansas State University |
Goos R.J.,Dep. of Soil Science |
And 2 more authors.
Agronomy Journal | Year: 2010
Cultivar selection is one of the best ways to manage iron-deficiency chlorosis (IDC) problems in soybean [Glycine max (L.) Merr.]. The objective was to determine if precision farming techniques of planting IDC-tolerant cultivars in calcareous soil areas and high-yielding cultivars in non-IDC areas would increase soybean yield. We used paired sites within the same field. The sites were located in areas of a field where IDC was present and absent. The same commercial soybean cultivars were planted on the paired sites. Results showed that visual scores for IDC could not identify the highest-yielding cultivar in IDC-affected areas. If the only information available to growers is yield on non-IDC sites and visual IDC ratings, then the yield of the whole field could be increased by planting two different cultivars. If yield data from replicated performance testing of numerous different cultiars was available for IDC sites and also for non-IDC sites, then growers may be able to identify a single cultivar that has high yield across the entire field. © 2010 by the American Society of Agronomy.
Lozano-Del Rio A.J.,Antonio Narro Agrarian Autonomous University |
Lozano-Cavazos C.J.,Instituto Nacional de Investigaciones Nucleares |
Ibarra-Jimenez L.,Research Center en Quimica Aplicada |
de la Cruz-Lazaro E.,Juarez Autonomous University of Tabasco |
And 5 more authors.
Journal of Plant Registrations | Year: 2010
'TCLF-AN-105' (Reg. No.TCL-009-251104, México; Reg. no. CV-31, PI 658496) intermediate triticale (× Triticosecale Wittmack) was developed by the International Maize and Wheat Improvement Center (CIMMYT), México, and reselected and released as a forage cultivar in Mexico by the Universidad Autónoma Agraria Antonio Narro (UAAAN). TCLF-AN-105 was selected from the progeny of the cross CT776.81//TESM01/MUSK603 produced in the Yaqui Valley, México, in 1989. CT776.81 and TESM01/MUSK603 are two parental lines (winter and spring triticale, respectively) developed by CIMMYT. TCLF-AN-105 was released because of its biomass production, cycle duration and nutritive value. The selection was based primarily on forage and agronomic characteristics and resistance to stem and leaf rust. 'TCLF-AN-31' winter triticale (Reg. no. CV-25, PI 620762), released as a forage cultivar by the UAAAN in 1992 (México Reg. No. TCL-07-080592) was used as reference cultivar. © Science Society of America.
Lozano-Del rio A.J.,Antonio Narro Agrarian Autonomous University |
Lozano-Cavazos C.J.,Antonio Narro Agrarian Autonomous University |
Ibarra-Jimenez L.,Research Center en Quimica Aplicada |
De la cruz-Lazaro E.,Juarez Autonomous University of Tabasco |
And 10 more authors.
Journal of Plant Registrations | Year: 2014
'ANPELON' (Reg. No. 2640-TCL-014-010313, Mexico; Reg. No. CV-32, PI 669388) winter triticale (× Triticosecale Wittm.) was selected from the heterogeneous population URSS 3310, sent to Universidad Autónoma Agraria Antonio Narro (UAAAN) by the International Maize and Wheat Improvement Center (CIMMYT), Mexico, and registered and released as a forage cultivar in Mexico by the UAAAN and the National Seed Inspection and Certification Service (SNICS) in 2012. ANPELON was released because of its biomass production, regrowth capacity, awnless spikes, and nutritive value. The primary selection was based on agronomic characteristics and resistance to stem rust (caused by Puccinia graminis Pers. f. sp. tritici Eriks. & Henn) and leaf rust (caused by P. recondita Rob. ex Desm. f. sp. tritici) and subsequently, on forage and nutritional characteristics. The reference cultivar was 'TCLFAN-31' winter triticale (Reg. No. CV-25, PI 620762), released as a forage cultivar by the UAAAN in 1992 (Reg. No. TCL-07-080592, Mexico). © Crop Science Society of America. All rights reserved.
Wild P.L.,Dep. of Plant science |
van Kessel C.,Dep. of Plant science |
Lundberg J.,Lundberg Family of Farms |
Linquist B.A.,Dep. of Plant science
Agronomy Journal | Year: 2011
Nitrogen is the most limiting nutrient in irrigated rice (Oryza sativa L.) production, and growers continue to be faced with the challenge of meeting crop N demand, particularly in organic production systems. The main objective of this study was to determine how rice yield was affected by seasonal availability of N from organic sources under continuously and noncontinuously flooded conditions. Laboratory and field experiments were conducted to determine the effectiveness of the commonly used poultry litter, pelletized organic fertilizers (blood, meat, and feather meal 13-0-0, feather meal 12-0-0, poultry litter plus feather meal 6-3-2), and (NH 4) 2SO 4, in synchronizing the supply of mineralized N with the demand of N by rice. The N mineralization of all organic fertilizers occurred primarily during the first 53 d after planting, results which were confirmed subsequently in a laboratory incubation study. In all fields, fertilizers increased grain yield and N uptake relative to a zero N control. Relative to poultry litter, the pelletized fertilizers resulted in higher yields (9980 vs. 9267 kg ha -1), N uptake (140 vs. 114 kg ha -1), and N recovery efficiency (35 vs. 20%) in all fields. It was concluded that pelletized fertilizers were significantly more effective than poultry litter in supplying N to the crop when fields were continuously flooded. In contrast all organic fertilizers were less effective in supplying N when fields were drained for weed control due to lower N recovery efficiency (26%) and N loss through denitrify cation, indicating that organic fertilizer application may not be economically viable under such circumstances. © 2011 by the American Society of Agronomy. All rights reserved.
Kang J.,University of Maryland University College |
Clark A.,University of Maryland University College |
Van Sanford D.,Dep. of Plant science |
Griffey C.,Virginia Polytechnic Institute and State University |
And 4 more authors.
Crop Science | Year: 2011
Fusarium head blight (FHB), caused by Fusarium graminearum, of wheat (Triticum aestivum L.) is a disease that periodically strikes the mid- Atlantic region of the United States. Breeding for resistant wheat varieties is an effective method of disease control. The objective of this study was to evaluate the effects of exotic FHB resistance quantitative trait loci (QTL), singly and in combination, on FHB resistance in soft red winter wheat (SRWW). Three FHB resistance QTL on chromosomes 3BS (Fhb1), 2D, and 5A were introgressed from nonadapted Chinese cultivar Ning7840 into the adapted SRWW cultivar McCormick. Eight near-Isogenic lines (NIL) were developed by marker-assisted backcrossing. The NIL that combined 3BS and 2DL expressed the highest resistance and lowest deoxynivalenol (DON) content in four environments that included three field and one greenhouse studies. These results indicate that the combination of just two QTL (3BS and 2DL) would be useful to breed for improved FHB resistance in SRWW in the mid-Atlantic region. © Crop Science Society of America.