Download or read book Introgressing a New Source of Host plant Resistance to European Corn Borer Into Two Elite Maize Inbred Lines written by Craig Arthur Abel and published by . This book was released on 1998 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eleven accessions of Peruvian maize were evaluated for mechanisms of resistance to leaf feeding by European corn borer, Ostrinia nubilalis (Hubner). Antibiosis was identified as one mechanism of resistance that operates at a level equivalent to Cl31A which is a maize inbred line containing high levels of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), thus having strong antixenotic and antibiotic properties towards leaf feeding by European corn borer. Antixenosis may be another mechanism of resistance operating in the Peruvian maize but at a level lower than Cl31A. The 11 Peruvian maize accessions were used as donor parents in a backcross plant breeding program designed to introgress the European corn borer resistance trait into two elite U.S. Corn Belt adapted inbred lines. Resistance to European corn borer leaf feeding and sheath and collar feeding was recovered in the Fl indicating dominant genetic control.

Download or read book Report of Annual Corn and Sorghum Research Conference written by and published by . This book was released on 1997 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inheritance in Maize of Reaction to European Corn Borer and Its Relationship to Certain Agronomic Characters written by and published by . This book was released on 1958 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toward Insect Resistant Maize for the Third World written by International Maize and Wheat Improvement Center and published by CIMMYT. This book was released on 1989 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanisms of Resistance to European Corn Borers Ostrinia Nubilalis Hubner in Exotic Maize Lines written by Sue Lynn Sullivan and published by . This book was released on 1975 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Combining Ability Study for Resistance to Second Generation European Corn Borer in Seven Maize Populations written by Khamis Ibrahim Khalifa and published by . This book was released on 1986 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Southwestern Corn Borer Host Plant Resistance For Open Pedigree Hybrids and Inbred Lines of Corn written by Edsel D. Bynum and published by . This book was released on 1980 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selection for European Corn Borer Leaf and Sheath collar feeding Resistance in Maize written by James Steven Parks and published by . This book was released on 1980 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Studies to Investigate Maize Zea Mays L Leaf Feeding Resistance to Lepidopteran Insect Pests written by Catherine Rose Thome and published by . This book was released on 1991 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Trait Loci for First and Second generation European Corn Borer Resistance in Maize written by Chaba Jampatong and published by . This book was released on 1999 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: European corn borer (ECB), Ostrinia nubilalis Hübner, family Crambidae, order Lepidoptera, is a serious insect pest of maize (Zea mays L.) in the United States. Losses to farmers resulting from ECB damage and control costs exceed $1 billion each year. An understanding of the genetic basis for ECB resistance should increase the efficiency of breeding for insect resistant varieties. The objectives of this study were to determine the number, genomic positions, and genetic effects of quantitative trait loci (QTL) conferring resistance to the first- and second-generation of European corn borer (1ECB, 2ECB), and to observe QTL × environment interactions. The study included 244 F 2-3 families derived from the cross of B73 (susceptible) × Mo47 (resistant). Evaluating resistance against 1ECB, plants were manually infested at the eight- to ten-leaf stage of plant development. Leaf feeding damage was assessed three weeks after infestation with a visual rating scale. Evaluation for resistance to 2ECB involved manually infesting at anthesis stage of plant development. Approximately seven weeks later, stalks were split lengthwise and number and the length of tunnels visually estimated in inches. Plant height and rind penetrometer resistance were measured two weeks after flowering. Quantitative trait loci analyses for individual environments and combined across three environments were performed by composite interval mapping using QTL Cartographer. For 1ECB leaf feeding, nine QTLs were identified on chromosomes 1(three QTLs), 2, 4 (two QTLs), 5, 6, and 8. Seven QTLs for resistance to 2ECB tunnel length were found on chromosomes 2, 5 (two QTLS), 6 (two QTLs), 8, and 9. Twelve QTLs for resistance to 2ECB tunnel length adjusted for plant height were identified on chromosomes 1 (two QTLs), 2, 3 (two QTLs), 5, 6 (three QTLs), 8, 9, and 10. In addition, QTLs were identified for tunnel number (16 QTLS), plant height (11 QTLs) and rind penetrometer resistance (nine QTLs). In this experiment, a total of 47 QTLs for all traits were mapped in three individual environments and combined over environments. Nine (19%) QTLs were expressed in all three environments and combined, 17 (36%) were expressed in two environments and combined, and 21 (45%) were expressed only in single environment and combined. Inconsistency of QTLs across environments suggested need for breeders awareness when selecting markers linked to QTLs for marker-assisted selection (MAS). Further study on consistency of QTLs across populations is needed before applied breeding programs can fully utilized QTL information.

Download or read book Investigation of Resistance to Ear Damage in Maize Caused by the Second Brood European Corn Borer written by Stephen Lambert Grier and published by . This book was released on 1981 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Host Plant Resistance in Two Tropical Maize Zea Mays L Populations to the Southwestern Corn Borer Diatraea Grandiosella Dyar the Sugarcane Borer D Saccharalis Fabr written by Daniel G. Hinderliter and published by . This book was released on 1983 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resistance of Maize to European Corn Borer Damage and Its Relationship to Larval Behavior written by Elizabeth Margaret Lamb and published by . This book was released on 1992 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Physiology and Host Genetics of Quantitative Resistance in Maize to the Fungal Pathogen Cochliobolus Heterostrophus written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative disease resistance, despite widespread use, remains poorly understood. A previous project in the NCSU Maize Disease Resistance Genetics lab has generated 253 near-isogenic lines (NILs) in the background of the historically important maize inbred line B73. B73, although of excellent overall agronomic quality, is highly resistant to a number of common maize diseases. Each NIL is genetically differentiated by its combination of 1-5 of 12 total introgressed regions from the multiple disease-resistant parent NC250P. These 12 NC250P introgressions were selected for study as, following an initial B73 x NC250P cross, they had been retained by a program of recurrent backcrossing to B73 and selection for resistance to the fungal maize pathogen Cochliobolus heterostrophus, causal agent of southern corn leaf blight (SLB). Prior research also evaluated the effect of each NC250P introgression in conferring quantitative resistance or susceptibility against SLB. Introgressions having an effect can be designated as disease resistance quantitative trait loci, or ÃØâ'ƠÅ"dQTLsÃØâ'ƠÂ . Presented here is a 2-phase study with the ultimate aim of characterizing the physiological basis for the effect on disease severity of these NC250P-derived SLB dQTLs. The first phase attempts to determine more precisely how infection is altered by the two largest-effect introgressions, termed dQTL 3.04 and dQTL 6.01 (or 3B and 6A). To do so, it uses growth chamber juvenile plant trials to compare the interactions between C. heterostrophus and 6 select lines - B73, the major-gene resistant line B73rhm (also a B73-background NIL), and four NILs with varying combinations of dQTLs 3.04 and 6.01 - by quantifying spore germination and penetration efficiency, hyphal growth, and host expression of the pathogenesis related genes PR1 and PR5. The second phase investigates dQTL disease specificity by field testing 236 NILs for adult plant resistance to 5 fungal maize pathogens. Based on the results of.

Download or read book European Corn Borer Ostrinia Nubilalis Hubner Resistance in Maize written by Chareinsuk Rojanaridpiched and published by . This book was released on 1983 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Architecture of Resistance to Phylogenetically Diverse Viruses in Maize written by Jose Luis Zambrano Mendoza and published by . This book was released on 2013 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: MRFV causes one of the most important virus diseases of maize in the Americas. Genetic resistance was previously identified in a tropical highland inbred line and two tropical landraces. The fact that the landraces were populations complicated genetic analysis of the resistance. In this research, novel sources of resistance to MRFV were identified, including inbred lines Oh1VI, Cuba, CML287, Ki11 and CML333. The discovery of novel sources of resistance in maize inbred lines facilitated the identification of a QTL conferring resistance to MRFV and will make possible its incorporation and use into breeding programs.