Download or read book Heritability of Resistance to Barley Yellow Dwarf Virus in Oats written by George Eldon Brown and published by . This book was released on 1961 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on the Disease Reactions of Pure lines and the Inheritance of Barley Yellow Dwarf Virus Resistance in Oats written by David Creighton Cooper and published by . This book was released on 1983 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stunting as an Indicator of Barley Yellow Dwarf Severity in Winter Wheat and Spring Oats and Genetics of Tolerance to Barley Yellow Dwarf Virus in Oats written by Andrea Rochelle Collett McNabb and published by . This book was released on 2007 with total page 130 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 The Genetics of Barley Yellow Dwarf Virus Resistance in Barley and Rice written by Nicholas C. Collins and published by . This book was released on 1996 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis aims to characterise the basis of naturally occuring resistance to BYDV in cereals in three ways: i. A map-based approach to the isolation of the Yd2 gene for BYDV resistance from barley. -- ii. Determining if a BYDV resistance gene in rice is orthologous to Yd2. -- iii. Establishing if other BYDV resistance genes in non-Ethiopian barleys are allelic to Yd2.

Download or read book World Perspectives on Barley Yellow Dwarf written by Peter A. Burnett and published by CIMMYT. This book was released on 1990 with total page 532 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 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 Inheritance of Resistance to Barley Yellow Dwarf Virus Disease in Barley written by William Earl Sieveking and published by . This book was released on 1969 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were conducted on artificially infected susceptible and resistant barley varieties in an attempt to determine the effect of barley yellow dwarf virus on the growth and development of these plants. A resistant and a susceptible variety were infected at four stages of growth and harvested at two stages. Roots, and the above ground portions of the plants were measured and weighed and the number of tillers were counted. Thirty barley varieties and three oat varieties were grown in greenhouse soilbeds and infected with barley yellow dwarf virus. The height of the plants was measured at weekly intervals until heading, and again at harvest. Yield components were also determined at harvest as well as total seed yield. Seventeen crosses between thirteen resistant and susceptible barley varieties were made, and the F2 and F3 generations evaluated for resistance to the barley yellow dwarf disease. The possibility of an association between resistance and the characters of kernel row number, kernel color, rachilla hair length, and the length of outer glumes was investigated. These investigations indicated that the barley yellow dwarf disease apparently exerts a primary effect on root development, resulting in an inadequate supply of moisture and nutrients to the plant. While the root development of susceptible plants was restricted when plants were infected at early stages of growth, infection of resistant plants at the 3- and 5-leaf stages of development resulted in stimulation of root development. Resistant varieties reacted differently to infection by barley yellow dwarf virus. While all infected plants of resistant varieties grew approximately the same in height as the uninfected plants, the components of yield were affected. One yield component of a resistant variety would be increased while another was suppressed. In another resistant variety the reverse reaction was observed. A few varieties were observed in which the all yield components were equal or superior to those of uninfected plants of the same variety, resulting in increased total yields of grain. Genetic investigations indicated that one gene segregated for resistance, and that the same gene segregated in the varieties CI 3208-4, CI 9654, and CI 9795. The gene which segregated for resistance was assumed to be the Yd2 gene even though this gene was expressed as a recessive in all crosses between a resistant and susceptible variety. The difference in behavior of this gene was explained by the fact that the susceptible variety, Hannchen, exhibits a low level of resistance to the disease. No association was found between yellow dwarf resistance and any other characters studied. An association was found between the character of red kernel color in the Abate variety and kernel row number, indicating that kernel color was controlled by the Re2re2 gene on chromosome V.A recombination value of 20.42 ± 4.67% was obtained.

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 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 Barley Yellow Dwarf Virus Tolerance written by David E. Baltenberger and published by . This book was released on 1987 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Barley Yellow Dwarf Virus BYDV in Oat and Wheat and Identification of a RAPD Marker Associated with BYDV Tolerance in Oat written by Catherine Gourmet and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Populations of F$sb2$ and F$sb3$ plants from intraspecific spring oat (Avena sativa L.) crosses were grown in the greenhouse using a modified single-seed descent method with 100 plants per 15 cm pot. Subpopulations were inoculated with the BYDV-PAV-IL strain (1) in the F$sb2$ generations only, and (2) in the F$sb2$ and F$sb3$ generations, using viruliferous aphids (Rhopalosiphum padi L.). These subpopulations were compared to uninoculated subpopulations. Inoculation did not increase the frequency of BYDV tolerant genotypes in the four crosses studied. The transmission characteristics of wingless (nymphs and apterous adults) viruliferous R. padi after access to oat treated with different rates of imidacloprid, a seed-treatment insecticide, were compared. After access to treated plants, aphid fecundity was reduced, aphids walked and fed atypically, and often abandoned the host plant. Aphids transmitted the virus to both treated and untreated plants, but the percentage of infected insecticide-treated seedlings was half that of untreated seedlings. The control of barley yellow dwarf using imidacloprid at three rates (0.6, 1.2 and 1.8 g a.i. Kg$sp{-1}$) was studied in two oat and four soft red winter wheat cultivars in six-row plots. All insecticide treatments decreased the percentage of infected plants. Compared to untreated plots, yields were increased 112% and 35% in 1992 and 1993, respectively, in treated plots of a moderately susceptible oat cultivar inoculated with viruliferous aphids carrying BYDV-PAV-IL. In insecticide-treated plots of a tolerant oat cultivar, yields increased 23% and 21% in 1992 and 1993, respectively, compared to untreated plots. Yield increases of up to 21% were observed in treated plots of a susceptible wheat cultivar inoculated with viruliferous aphids carrying BYDV-PAV-IL. For all wheat cultivars, yield was negatively correlated with the percent disease incidence, and positively correlated with test weight and the calculated number of seeds tiller$sp{-1}$. Test weight was negatively correlated with kernel weight. A RAPD marker associated with a gene for BYDV tolerance was identified in neat-isogenic lines (NILs) differing in BYDV tolerance. The NILs were derived by backcrossing with the sensitive cultivar Clintland 64 as recurrent parent to tolerant parents Ogle, IL 86-5698, IL 86-6404, and IL 86-1156 as donor parents. A polymorphic band is present in the donor parents and most BYDV tolerant NILs, but absent in the recurrent parent. The marker is associated with a gene for BYDV tolerance in NILs of IL 86-5698 x Clintland 64 and of IL 86-1156 x Clintland 64. The marker is not associated with BYDV tolerance in the two groups of NILs derived from backcross involving Ogle x Clintland 64 and IL 86-6404 x Clintland 64.

Download or read book Selection for Barley Yellow Dwarf Tolerance written by Catherine Gourmet and published by . This book was released on 1991 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Barley Yellow Dwarf in West Asia and North Africa written by and published by . This book was released on 1992 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Barley Yellow Dwarf written by George W. Bruehl and published by . This book was released on 1961 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: