Download or read book Control of Barley Yellow Dwarf Virus BYDV in Oat and Wheat and Identification of a RAPD Marker Associated with BYDV Toleranace in Oat written by Catherine Gourmet and published by . This book was released on 1995 with total page 274 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 Trials on Wheat Barley and Oat Tolerance to Barley Yellow Dwarf Virus Bydv written by CANADA. Station de Recherches Agriculture and published by . This book was released on 1979 with total page 17 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 Evaluation of Molecular Markers Previously Associated with Barley Yellow Dwarf Virus Tolerance in Oat written by Nicholas Paul Ochs and published by . This book was released on 2004 with total page 86 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 Studies on the Barley Yellow Dwarf Virus BYDV Disease in Oats written by Praphas Weerapat and published by . This book was released on 1971 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Markers Associated with Barley Yellow Dwarf Virus Tolerance in Spring Oat and Their Utilization in Predictive Breeding written by Bradley Joseph Foresman and published by . This book was released on 2016 with total page 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 1996 with total page 800 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 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 American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tolerance to Barley Yellow Dwarf Viruses in Two Pairs of Sister Oat Lines written by Hanafy Mahmoud Fouly and published by . This book was released on 1991 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The titers of barley yellow dwarf viruses (BYDV-PAV-IL and BYDV-RPV-IL) in two pairs of sister oat lines tolerant and susceptible to BYDV-PAV were measured by double antibody sandwish enzyme-linked immunosorbent assay (DAS-ELISA) and by purification. There were consistent relationships between expression of symptoms and virus titers in tolerant and susceptible pairs of oat lines when inoculated in the greenhouse with PAV-IL or RPV-IL. In case of PAV-IL, the virus infects and accumulates to similar levels in shoot and root tissues of these lines. RPV-IL titers were higher in the susceptible line than in tolerant lines. Translocation of barley yellow dwarf viruses (BYDV-PAV-IL and BYDV-RPV-NY) in those two pairs of sister oat lines was measured by trible antibody sandwish enzyme-linked immunosorbent assay (TAS-ELISA) and by dot blot hybridization. PAV-IL virus and PAV-IL-RNA titers in shoots and roots of tolerant lines were equivalent to or higher than the titers in susceptible oat lines. Thus, there was no inhibition of PAV-IL replication or movement in tolerant lines. Titers of RPV-NY virus and RNA in shoots of tolerant lines also were equivalent to or higher than the titers in shoots of susceptible oat lines. However, titers of RPV-NY virus and RNA in roots of susceptible oat lines were higher than the titer in tolerant oat lines on middle and late sampling dates. There apparently is some restriction on RPV-NY movement to and/or replication within the roots of these tolerant lines.
Download or read book Early Generation and Molecular Assisted Selection for Barley Yellow Dwarf Virus Tolerance in Elite Oat Populations written by Mario Raul Gaggero and published by . This book was released on 2006 with total page 94 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 Recent Progress in Solving Some Farm Problems of Illinois written by University of Illinois at Urbana-Champaign. Agricultural Experiment Station and published by . This book was released on 1994 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relation of Barley Yellow dwarf Virus Infection to Rhizosphere Fungi in Barley and Oats with Emphasis on a Cryptomela Isolate written by Antonio Crisotomo Pizarro and published by . This book was released on 1966 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
