Author: G. C. LuzzardiPublisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Studies on the Inheritance of Resistance of Varieties of Wheat to Septoria Nodorum Berk
Author: G. C. LuzzardiInheritance of Resistance to Septoria Nodorum (Berk.) Berk. in a Wheat Cross
Author: João Carlos A. DiasPublisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Inheritance of sedling resistance to Septoria nodorum (Berk.) Berk. was studied in the cross of spring wheat, Toropi, with a hard red winter wheat, Centurk 78, at the University of Nebraska-Lincoln greenhouse, Lincoln, Nebraska. Percent necrosis per square centimeter of leaf area and number of lesions per square centimeter of leaf area were symptom parameters measured. Analyses od variance of the symptom expressions in the parents, F1, F2 and backcrosses to each parent were calculated. The genetic variation obtained though the frequency distribution for each generation and parents was studied. Heritability in the broad sense was calculated for each character studied. The heritability in the broad sense was relatively high, especially in the second test for both characters. The genetic variances of the F2 progenies were greater than the genetic variances within the parents. In order to obtain better information to support the finding of this study, the tests made with F2 plants should be followed up by head-row tests. These tests were not made in this study due to limitations of time. The lack of significant dominance effects the absence of heterosis for both symptom parameters studied in this experiment provide evidence that dominance may be lacking in loci controlling either susceptibility or resistance to Septoria nodorum in this cross. Very positive transgressive segregation for resistance or susceptibility was not evident in this research. From the results of this experiment it can be concluded that quantitative factors are involved in the inheritance of resistance to Septoria nodorum. Therefore, efficient breeding procedures which allow the accumulation of favorable genes for resistance through some recurrent selection system should be effective in the improvement of high-yielding lines highly resistant to Septoria nodorum. Since the pricipal problem in conducting recurrent selection in a self-pollinated crop is the large number of crosses necessary in the recombination phase of the selection cycle, simple seed descent methods could be used, as suggested by Brim (1966) and Compton (1968).
Studies on the Mechanisms of Resistance of Wheat to Septoria Nodorum Berk..
Author: studies on Septoria nodorum Berk., a pathogen of wheat in eastern Washington
Author: J. M. FernandesPathogenesis of Septoria Nodorum (Berk) Berk. on Wheat Cultivars Varying in Resistance to Glume Blotch
Author: Mary Louise StraleyPublisher:
ISBN:
Category : Phytopathogenic fungi
Languages : en
Pages : 198
Book Description
Regional Wheat Workshop for Eastern, Central and Southern Africa 12. Nakuru, (Kenya); 22-26 Nov. 2004. Proceedings
Author: The Septoria Diseases of Wheat
Author: Z. EyalPublisher: CIMMYT
ISBN: 9789686127065
Category : Septoria
Languages : en
Pages : 56
Book Description
Inheritance and Improvement of Disease Resistance or Stress Tolerance for Triticeae Crops
Author: Pengtao MaPublisher: Frontiers Media SA
ISBN: 2889748154
Category : Science
Languages : en
Pages : 122
Book Description
Septoria of Cereals
Author: Septoria and Stagonospora Diseases of Cereals
Author: Maarten Van GinkelPublisher: CIMMYT
ISBN: 9706480358
Category : Grain
Languages : en
Pages : 194
Book Description