Screening and Inheritance of Rust Resistance in Snap Bean

2012 ◽  
Vol 16 (1) ◽  
pp. 99-113
Author(s):  
A. A. Hamed ◽  
Naglaa A. S. Muhanna ◽  
A. M. Abd Rabou
Keyword(s):  
Rust Resistance ◽  
Snap Bean ◽  
Inheritance Of Rust Resistance

Inheritance of Rust Resistance in Safflower 1

Crop Science ◽  
1969 ◽  
Vol 9 (4) ◽  
pp. 491-494 ◽  
Author(s):  
D. E. Zimmer ◽  
A. L. Urie
Keyword(s):  
Rust Resistance ◽  
Inheritance Of Rust Resistance

Quantitative inheritance of rust resistance in sugarcane

1993 ◽  
Vol 34 (2) ◽  
pp. 187-193 ◽  
Author(s):  
D.M. Hogarth ◽  
C.C. Ryan ◽  
P.W.J. Taylor
Keyword(s):  
Rust Resistance ◽  
Quantitative Inheritance ◽  
Inheritance Of Rust Resistance

THE INHERITANCE OF RUST RESISTANCE. VI. THE TRANSFER OF STEM RUST RESISTANCE FROM AGROPYRON ELONGATUM TO COMMON WHEAT

1961 ◽  
Vol 41 (1) ◽  
pp. 109-123 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Gamma Rays ◽  
Stem Rust ◽  
Rust Resistance ◽  
Wheat Chromosome ◽  
Stem Rust Resistance ◽  
Thermal Neutrons ◽  
X Rays ◽  
Agropyron Elongatum ◽  
Inheritance Of Rust Resistance ◽  
Or Genes

The rust resistance of a 56-chromosome wheat-Agropyron derivative was found to be controlled by a gene or genes on a single Agropyron chromosome. Resistant wheat plants having 21II of wheat chromosomes plus a single added Agropyron chromosome were produced. Spikes of these plants were irradiated with either gamma rays or X-rays and seeds were irradiated with thermal neutrons. As a result of the irradiation, in at least five lines and possibly seven a piece of the Agropyron chromosome carrying the gene or genes for rust resistance was transferred to a wheat chromosome. One of the translocations is transmitted normally through the gametes but the remaining six show irregularities in transmission particularly through the pollen.

The inheritance of stem rust resistance in Thatcher wheat

2000 ◽  
Vol 80 (1) ◽  
pp. 53-63 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Triticum Aestivum L ◽  
Stem Rust Resistance ◽  
Puccinia Graminis ◽  
Single Seed Descent ◽  
Good Resistance ◽  
Canadian Prairies ◽  
Single Seed ◽  
Inheritance Of Rust Resistance

Thatcher was the predominant wheat (Triticum aestivum L.) cultivar on the Canadian prairies in the 1950s. Until race 15B (TMH) of stem rust (Puccinia graminis pers. f. sp. tritici Eriks. & Henn.) became widespread, Thatcher had good resistance to stem rust, but was susceptible to leaf rust (P. recondita f. sp. tritici Rob. ex Desm.). Although genes for stem rust resistance have been identified in Thatcher, the inheritance of its resistance has never been fully understood. The objective of this research was to attempt to elucidate the inheritance of the resistance of Thatcher and to determine why it had a reputation as a poor parent for rust resistance. Over a period of 40 yr, crosses and backcrosses to a susceptible genotype and two sets of single seed descent (SSD) lines were studied. The second set of SSD lines was tested with isolates of six races of stem rust to which Thatcher is resistant. The data showed that Thatcher is a very heterogenous cultivar with individual plants differing widely in the genes for stem rust resistance that they carry. The inheritance of rust resistance varied greatly from race to race and was often quite complex. Either complementary genes or a gene plus a suppressor appeared to condition resistance to one race. Most genes gave resistance to only one race. The presence of Sr5, which Thatcher is known to have obtained from Kanred, was confirmed. Most of its many additional genes probably came from Iumillo durum wheat. Key words: Stem rust, Thatcher wheat, single seed descent

THE INHERITANCE OF RUST RESISTANCE. III. THE INHERITANCE OF STEM RUST RESISTANCE IN NINE KENYA VARIETIES OF COMMON WHEAT

1957 ◽  
Vol 37 (4) ◽  
pp. 366-384 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Genetic Analysis ◽  
Common Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Hypersensitive Reaction ◽  
Stem Rust Resistance ◽  
Inheritance Of Resistance ◽  
Susceptible Parent ◽  
Inheritance Of Rust Resistance ◽  
Moderate Resistance

The inheritance of resistance to races 15B and 56 of stem rust was studied in the varieties Kenya 58, Kenya 117A, Kenya C9906, Kenya 338.AC.2.E.2, Kenya Governor, Kenya B286, Kenya 291.J.1.I.1, Kenya 321.BT.1.B.1 and Kenya 350.AD.9.C.2. The first five varieties had been studied previously and crosses involving them were not repeated. The genetic analysis of the varieties was based on diallel crosses and backcrosses to a susceptible parent, Marquis.All nine varieties proved to carry Sr7, a gene which conditions resistance to race 15B. Four varieties, Kenya 58, Kenya C9906, Kenya 291 and Kenya 350, carry the gene Sr6, which conditions a hypersensitive reaction to both race 15B and race 56. In addition, four of the varieties carry Sr9 and five carry Sr10, two genes which produce moderate resistance to race 56. Kenya 338.AC.2.E.2 carries two additional dominant, complementary genes, Sr11 and Sr12, which condition resistance to race 56.The genes, Sr9, Sr10, Sr11 and Sr12 are important modifiers of the resistance to race 15B conditioned by Sr7, with Sr9 probably having the greatest effect.

scholarly journals Targeting Gene Combinations for Broad-spectrum Rust Resistance in Heat-tolerant Snap Beans Developed for Tropical Environments

2010 ◽  
Vol 135 (6) ◽  
pp. 521-532 ◽  
Author(s):  
Charles J. Wasonga ◽  
Marcial A. Pastor-Corrales ◽  
Timothy G. Porch ◽  
Phillip D. Griffiths
Keyword(s):  
Puerto Rico ◽  
Heat Tolerance ◽  
Rust Resistance ◽  
Eastern Africa ◽  
Snap Bean ◽  
Breeding Lines ◽  
Snap Beans ◽  
Tropical Environments ◽  
Heat Tolerant ◽  
Rust Resistance Genes

Common bean rust disease (caused by Uromyces appendiculatus) and high temperatures (heat stress) limit snap bean (Phaseolus vulgaris) production in many tropical and temperate regions. We have developed snap bean lines combining broad-spectrum rust resistance with heat tolerance for tropical agroecosystems. Eight breeding populations were developed by hybridizing BelJersey-RR-15 and BelFla-RR-1 (each possessing the Ur-4 and Ur-11 rust resistance genes) and the heat-tolerant snap bean breeding lines HT601, HT603, HT608, and HT611. F2–F4 generations of the populations were evaluated under greenhouse conditions and selected for heat tolerance while simultaneously selecting for the rust resistance genes Ur-4 and Ur-11. Three heat-tolerant F5 lines, which were homozygous for Ur-4 and Ur-11 genes, were selected together with a rust-resistant but heat-sensitive control. These and 12 cultivars adapted to different geographical regions were evaluated for their reaction to rust and yield at six contrasting field sites in eastern Africa and their response to high temperature verified in Puerto Rico. Rust incidence and severity was high at three of the trial sites in eastern Africa. Two of the 12 cultivars were resistant to rust at most of these sites, and three of the four breeding lines were resistant at all sites. The Ur-11 gene effectively conferred rust resistance at all sites. Yield in Puerto Rico was strongly correlated (R2 = 0.71, P < 0.001) with that of the hottest site in eastern Africa, highlighting the similarity in genotypic response to high temperatures at the two distinct sites. The newly developed rust-resistant and heat-tolerant breeding lines showed stable yield at the eastern Africa sites with contrasting mean temperatures compared with the cultivars presently grown in the region. Two of these lines, HT1 and HT2, were confirmed to be homozygous for Ur-4 and Ur-11 and with high heat tolerance under both greenhouse and field environments. This research validates the effectiveness of targeted rust resistance gene combinations for tropical environments and the effective selection of high temperature tolerance traits correlating across multiple environments. The breeding lines HT1 and HT2 developed in this research could be used to improve snap beans for the tropics and other environments with similar constraints.

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