Download or read book Assessment of Resistance and Inheritance to Barley Yellow Dwarf Virus Disease in Five Wheat Cultivars Triticum aestivum L written by Tola Jaime and published by INIAP Archivo Historico. This book was released on with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Resistance and Inheritance to Barley Yellow Dwarf Virus Disease BYDV in Five Wheat Cultivars Triticum Aestivum L written by Jaime Tola and published by INIAP Archivo Historico. This book was released on 1983 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barley Yellow Dwarf Virus (BYDV) is a major disease of wheat. Unfortunately, unlike barley where the Yd2 gene provides adequate levels of resistance, the situation in wheat is more complex. This study was designed to provide information regarding: 1) evaluation of methods of measuring resistance among selected cultivars; 2) identification of sources of resistance; and 3) determination of the nature of inheritance controlling BYDV resistance. Five wheat cultivars with possible different levels of resistance to BYDV and the resulting F1, F2, F3, BC-1 and BC-2 populations provided the experimental material. An assessment of the damage inflicted by aphids feeding per se and aphid plus virus on the five cultivars was determined under greenhouse conditions. Cultivars and the resulting progeny were grown in the field to confirm the greenhouse findings and to determine nature of inheritance. Aphid feeding per se did not influence most cultivars other than for plant height involving Yamhill and Anza. Despite the lack of visual symptoms, BYDV did significantly influence the six parameters measured with the cultivars Stephens and Riebesel exhibiting the greatest reduction. No immunity was observed for any of the cultivars tested. Under field conditions Stephens, followed by Riebesel, were the most susceptible cultivars with Yamhill, Novi Sad and Anza being the most resistant based on the parameters measured. The inheritance pattern appeared to be quantitative with both additive and nonadditive genetic variability involved in controlling resistance. This was verified by the transgressive segregation noted in F2 and F3 generations and the significant General and Specific Combining Ability estimates for the BYDV score. Due to the quantitative nature of BYDV resistance and the different genetic factors observed for the cultivars in this study, a recurrent selection program should result in higher levels of resistance than exhibited by the cultivars employed in this study. Also, the use of a visual BYDV score appears to be an effective means of identifying resistant parents.

Download or read book The Inheritance of Resistance to the Barley Yellow Dwarf Virus in Wheat Triticum Aestivum L written by Mehmet Ali Topcu and published by . This book was released on 1975 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inheritance of Resistance to Barley Yellow Dwarf Virus in Wheat on Basis of Visual Symptom Expression and PAV RNA Concentration written by Gale Francis Lorens and published by . This book was released on 1988 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quick Bibliography Series written by and published by . This book was released on 1976 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ti plasmids and Other Plant Gene Vectors written by Robert D. Warmbrodt and published by . This book was released on 1991 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1984-02 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effectiveness of the Visual Symptom Score in Selecting Germplasm for Resistance to the Barley Yellow Dwarf Virus Disease in Wheat Triticum Aestivum L written by Oswaldo Chicaiza and published by INIAP Archivo Historico. This book was released on 1989 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1999 with total page 1664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1983 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Barley Yellow Dwarf Disease written by Monique Henry and published by CIMMYT. This book was released on 2002* with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbiology Abstracts written by and published by . This book was released on 1984 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Selected Varieties of Wheat Barley and Oats for Resistance to Barley Yellow Dwarf Virus written by Louis T. Palmer and published by . This book was released on 1965 with total page 108 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 1984 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pyramiding Disease Resistance Genes In Wheat Triticum Aestivum L written by Mitra Serajazari and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The major goal of this study was to accumulate plant disease resistance QTL (Quantitative Trait Loci) and genes to Fusarium head blight (FHB), leaf rust (Lr), Septoria tritici blotch (STB) and barley yellow dwarf virus (BYDV) in wheat. Two winter and two spring wheat cultivars were crossed and seven generations of spring wheat were developed in three years. Fifty percent of the F3 and 20% of the F5 population showed low severity to both leaf rust and Septoria tritici blotch. Analysis of QTL tagged by molecular markers showed an epistatic effect of an Xgwm533 allele (associated with type II resistance to FHB) on an unknown allele in the F5 population. The relationships between the leaf rust resistance gene Lr34 and Fusarium toxin deoxynivalenol (DON) were not significant. Biplot analyses of the F3 and derived F5 populations demonstrated that the associations between molecular markers and disease resistance were heritable and that genotypic screening can be used in early generations in a small population. Pre-screening of a doubled haploid (DH) wheat population with molecular markers demonstrated that the resistant Xgwm533 allele from Sumai3 had no negative effect on yield whereas the effects of other QTL on yield remains to be determined. Two sources of FHB resistance (25R51 and RCATL31) were incorporated into the DH population and 6% of DH lines displayed a lower FHB incidence than the parent line 25R51 indicating improved FHB resistance in this population.