Results 231 to 240 of about 4,842,066 (260)

Postulation of Leaf Rust Resistance Genes in Iranian Wheat Cultivars and Breeding Lines

Canadian Journal of Plant Pathology, 2011
Abstract Knowledge of the number and identity of the leaf rust resistance genes in wheat breeding material is essential for maximizing resistance in future-bred cultivars. The objective of this study was to test for seedling resistance genes to Puccinia triticina potentially present in 36 Iranian wheat cultivars and breeding lines, using 13 prevalent ...
Ahmad Arzani, Farzad Afshari
exaly   +2 more sources

Geographical Distribution of Physiologic Races of Puccinia triticina and Postulation of Resistance Genes in New Wheat Cultivars in Egypt

International Journal of Phytopathology, 2012
Knowledge of the geographical distribution for physiologic races of Puccinia triticina and identification of leaf rust resistance genes (Lr ,s) in the recent Egyptian wheat cultivars are essential for maximizing resistance in future-bred cultivars. The  aim   of   this   study   was   to   know   the   status  of resistance in Egyptian wheat cultivars ...
Ashraf Abdelbacki
exaly   +3 more sources

Postulation of Leaf (Brown) Rust Resistance Genes in 70 Wheat Cultivars Grown in the United Kingdom

Euphytica, 2001
Multi-pathotype tests on 70 U.K. wheat cultivars permitted postulation of eight known seedling genes for resistance to Puccinia recondita f. sp.tritici either singly or in combinations. The most commonly detected gene was Lr13 (present in approximately 57% of cultivars), followed by Lr26 (22%), Lr37 (20%), Lr10 (17%), Lr17b (LrH) (10%), Lr1 (7%), Lr3a (
Robert F Park, Davinder Singh, R A McIntosh   +2 more
exaly   +2 more sources

Characterization of yellow rust resistance genes by using gene postulation and assessment of adult plant resistance in some Indian wheat genotypes

Research on Crops, 2015
The yellow rust caused by Puccinia striiformis f.sp. tritici is an important constraint to wheat production worldwide. Host resistance is the most economicalway to manage yellow rust. Race-specific resistance is short-lived and overcome by the evolution of new races of the pathogens. However, non-race-specific, or quantitative resistance, controlled by
Vaibhav K. Singh, R. C. Mathuria, G. P. Singh, P. K. Singh, Sanjay Singh, R. Gogoi, Rashmi Aggarwal   +6 more
openaire   +1 more source

Postulation of Seedling Resistance Genes in 20 Wheat Cultivars to Yellow Rust (Puccinia striiformis f. sp. Tritici)

Agricultural Sciences in China, 2009
Abstract The gene postulation, cluster analysis and pedigree analysis of 20 wheat cultivars to 28 physiological races of yellow rust ( Puccinia striiformis ) were conducted under greenhouse conditions. The spectrum of their resistance were compared each other. None of the 20 cultivars were resistant to all the test pathogens. The cultivars containing
Jing Feng
exaly   +2 more sources

Postulation of resistance genes to barley diseases in heterogeneous varieties

Biologia, 2011
Resistance to causal agents of diseases is an important varietal characteristic that influences the management practice of crop plants and thus production costs of commodities. At present, almost all European barley varieties possess at least one major gene for resistance to powdery mildew.
openaire   +1 more source

Postulation of Seedlings Resistance Genes to Yellow Rust in Commercial Wheat Cultivars From Yunnan Province in China

Agricultural Sciences in China, 2011
Abstract The objective of this study was to characterize yellow (stripe) rust resistance gene(s) in 52 commercial wheat cultivars from Yunnan Province in China, and to provide information for their rational deployment in field. Seedlings of wheat cultivars were inoculated with 25 differential isolates of Puccinia striiformis from foreign and home to ...
Jing Feng
exaly   +2 more sources

Postulation of Rust Resistance Genes in Nordic Spring Wheat Genotypes and Identification of Widely Effective Sources of Resistance Against the Australian Rust Flora

Journal of Applied Genetics, 2016
Wild relatives, landraces and cultivars from different geographical regions have been demonstrated as the sources of genetic variation for resistance to rust diseases. This study involved assessment of diversity for resistance to three rust diseases among a set of Nordic spring wheat cultivars.
Mandeep Randhawa, Morten Lillemo, Urmil K Bansal   +2 more
exaly   +3 more sources

Combination of resistance tests and molecular tests to postulate the yellow rust resistance gene Yr17 in bread wheat lines

Plant Breeding, 2000
AbstractYellow rust caused by Puccinia striiformis is a wheat disease of worldwide importance. The Yr17 resistance gene introgressed from Aegilops ventricosa was effective, in France, against all yellow rust isolates until 1998. The SC‐Y15 marker is one of three molecular markers closely linked to Yr17. In this paper, results obtained are compared with
Robert, Ophélie, Dedryver, Françoise, Leconte, M., Rolland, B., Devallavieillepope, C.   +4 more
openaire   +2 more sources

Postulated Genes for Resistance to Stripe Rust in Selected CIMMYT and Related Wheats

Plant Disease, 1989
Infection type data were used to postulate the presence of stripe rust seedling resistance genes in 20 CIMMYT and related bread wheats. Yr3, Yr6, Yr7 and Yr9 were hypothesized to be present in 12 lines, either alone or in combination. The isolates used also indicated the presence of additional unknown seedling resistance genes. Four lines produced only
openaire   +1 more source