Download or read book Experiments on Breeding Corn Resistant to the European Corn Borer written by and published by . This book was released on 1937 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiments on Breeding Corn Resistant to the European Corn Borer written by Marion Thomas Meyers and published by . This book was released on 1937 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiments on Breeding Corn Resistant to the European Corn Borer written by Marion Thomas Meyers and published by . This book was released on 1937 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiments in Breeding Corn for the Control of the European Corn Borer written by Marion Thomas Meyers and published by . This book was released on 1930 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breeding Corn Resistant to European Corn Borer written by OAC Review Index and published by . This book was released on 1933 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by and published by . This book was released on 1945 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Correlated Response to Recurrent Selection for Resistance to the European Corn Borer written by Gary Dean Lawrance and published by . This book was released on 1978 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to determine if the three cycles of recurrent selection for first-brood corn borer resistance also caused, or was accompanied by, significant changes in several important plant, ear, and grain traits. For a trait such a first-brood corn borer resistance, which is highly heritable when artificial infestation is used, favorable changes can be effected easily by the recurrent selection breeding procedure. Consequently, in certain circumstances it may be desirable to make such an improvement in a synthetic (or more than one highly heritable trait could be improved) before the synthetic is used for other purpose such as a source for new inbred lines. Therefore, it is important to know if unfavorable changes for other important traits may occur as correlated responses while the recurrent slection for the highly heritable trait is in progress. Although statistical significance may be obtained rather easily in experiments that have a high level of precision (relatively low experimental error and a high number of degrees of freedom), the breeder must decide if the differences observed are reat enough to be of practical importance. In the present study, significant variation was expected for population types and synthetics. The items of most interest were the main effects of corn borer treatment and cycles and interactions involving one or the other of these main effects. It was unfortunate that higher levels of corn borer infestation were not obtained in the (...).

Download or read book Evaluation of Recurrent Selection in Breeding Corn Resistant to the European Corn Borer Pyrausta Nubilalis Hbn written by Robert Louis Harrison and published by . This book was released on 1961 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Factors Influencing Populations of European Corn Borer Pyrausta Nubilalis Hbn in the North Central States written by Allan Ralph Barr and published by . This book was released on 1958 with total page 710 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 Look for the European Corn Borer written by Stanley Black Fracker and published by . This book was released on 1926 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Managing the Risk of European Corn Borer Resistance to Transgenic Corn written by Terrance M. Hurley and published by . This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Resistance of Corn to the European Corn Borer written by Robert Simpson Loomis and published by . This book was released on 1956 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book How Corn Breeders Put Insect Resistance Into Modern Hybrid Corn written by Funk Brothers Seed Company. Funk Hybrid Corn Research Staff and published by . This book was released on 1946 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Yield Performance of a Resistant and a Susceptible Field Corn Hybrid Under Different Intensities of European Corn Borer Infestation written by Avery Daniel Pratt and published by . This book was released on 1958 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The European Corn Borer written by Leonard Haseman and published by . This book was released on 1920 with total page 4 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.