Inheritance of Resistance in Three Cultivars of Beans to the Bean Rust Pathogen and the Interaction of Virulence and Resistance Genes

1982 ◽  
Vol 72 (7) ◽  
pp. 771 ◽  
Author(s):  
B. J. Christ
Keyword(s):  
Resistance Genes ◽  
Inheritance Of Resistance ◽  
Bean Rust ◽  
Rust Pathogen

scholarly journals Fine mapping of Ur-3, a historically important rust resistance locus in common bean

2016 ◽  
Author(s):  
O.P. Hurtado-Gonzales ◽  
G. Valentini ◽  
T.A.S Gilio ◽  
A.M. Martins ◽  
Q. Song ◽  
...  
Keyword(s):  
Common Bean ◽  
Resistance Genes ◽  
Fine Mapping ◽  
Rust Resistance ◽  
Bulked Segregant Analysis ◽  
Snp Markers ◽  
Resistance Locus ◽  
Bean Rust ◽  
Rust Pathogen ◽  
Rust Resistance Genes

AbstractBean rust is a devastating disease of common bean in the Americas and Africa. The historically important Ur-3 gene confers resistance to many races of the highly variable bean rust pathogen that overcome all known rust resistance genes. Existing molecular markers tagging Ur-3 for use in marker assisted selection produce false results. We described here the fine mapping of Ur-3 for the development of highly accurate markers linked to this gene. An F2 population from Pinto 114 × Aurora was evaluated for its reaction to four different races of the bean rust pathogen. A bulked segregant analysis using the SNP chip BARCBEAN6K_3 positioned the approximate location of the Ur-3 locus to the lower arm of chromosome Pv11. Specific SSR and SNP markers and haplotype analysis of 18 sequenced bean lines led to position the Ur-3 locus to a 46.5 Kb genomic region. We discovered a KASP marker, SS68 that was tightly linked to the Ur-3 locus. Validation of SS68 on a panel of 130 diverse common bean lines and varieties containing all known rust resistance genes revealed that it was highly accurate producing no false results. The SS68 marker will be of great value to pyramid Ur-3 with other rust resistance genes. It will also reduce significantly time and labor associated with the current phenotypic detection of Ur-3. This is the first utilization of fine mapping to discover markers linked to a rust resistance in common bean.

scholarly journals Mapping genes for resistance to Puccinia hordei in barley

2003 ◽  
Vol 54 (12) ◽  
pp. 1323 ◽  
Author(s):  
R. F. Park ◽  
D. Poulsen ◽  
A. R. Barr ◽  
M. Cakir ◽  
D. B. Moody ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Doubled Haploid ◽  
Recombinant Inbred ◽  
Growth Stage ◽  
Population Based ◽  
Puccinia Hordei ◽  
Barley Leaf Rust ◽  
Recombinant Inbred Population ◽  
Rust Pathogen ◽  
Barley Leaf

Six doubled haploid barley populations (Alexis × Sloop, Chebec × Harrington, Arapiles × Franklin, Patty × Tallon, Tallon × Kaputar, and Sloop × Halcyon) and a recombinant inbred population (WI2875-1 × Alexis) were assessed for response to selected pathotypes of the barley leaf rust pathogen, Puccinia hordei, at the seedling growth stage. Resistance genes were postulated for the parents of each population based on their reaction to selected pathotypes. In most cases, the resistance genes postulated in the cultivars were validated by QTL mapping analyses of the progeny populations. The resistance genes detected and mapped were Rph2, Rph3, Rph4, Rph12, and Rph19. The chromosomal locations of these 5 genes were consistent with previous reports, with Rph2 mapping near to the centromere on the short arm of chromosome 5H, Rph4 mapping to chromosome 1H, Rph12 mapping to the long arm of chromosome 5H, and Rph3 and Rph19 mapping ~30 cM apart on the long arm of chromosome 7H.

scholarly journals INHERITANCE OF RESISTANCE TO HAWAIIAN BEAN RUST (UROMYCES APENDICULATUS (PERS.) UNGER VAR. APPENDICULATUS) IN SNAP BEANS (PHASEOLUS VULGARIS L.)

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 597d-597
Author(s):  
Manuel A. Balcita ◽  
Richard W. Hartmann
Keyword(s):  
Phaseolus Vulgaris ◽  
Inheritance Of Resistance ◽  
Bean Rust ◽  
Phaseolus Vulgaris L ◽  
Local Cultivars ◽  
Snap Beans ◽  
Differential Cultivars ◽  
Dominant Genes

Four races of bean rust were identified from Oahu and Maui by testing on nineteen differential cultivars. All Hawaiian bean cultivars were very susceptible to the four races. F2 segregations of crosses between the differential cultivars and the local cultivars have identified one or more dominant genes for resistance to one, 2, 3 or 4 rust races as well as other genes which do not give qualitative ratios. F3 families are being evaluated to further identify the inheritance of these genes.

scholarly journals Genome-Wide Association Studies Reveal All-Stage Rust Resistance Loci in Elite Durum Wheat Genotypes

2021 ◽  
Vol 12 ◽  
Author(s):  
Meriem Aoun ◽  
Matthew N. Rouse ◽  
James A. Kolmer ◽  
Ajay Kumar ◽  
Elias M. Elias
Keyword(s):  
Durum Wheat ◽  
Leaf Rust ◽  
Stripe Rust ◽  
Resistance Genes ◽  
Stem Rust ◽  
Rust Resistance ◽  
Genome Wide Association ◽  
Genome Wide ◽  
Rust Pathogen ◽  
Rust Resistance Genes

Leaf rust, caused by Puccinia triticina (Pt), stripe rust caused by Puccinia striiformis f. sp. tritici (Pst), and stem rust caused by Puccinia graminis f. sp. tritici (Pgt) are major diseases to wheat production globally. Host resistance is the most suitable approach to manage these fungal pathogens. We investigated the phenotypic and genotypic structure of resistance to leaf rust, stem rust, and stripe rust pathogen races at the seedling stage in a collection of advanced durum wheat breeding lines and cultivars adapted to Upper Mid-West region of the United States. Phenotypic evaluation showed that the majority of the durum wheat genotypes were susceptible to Pt isolates adapted to durum wheat, whereas all the genotypes were resistant to common wheat type-Pt isolate. The majority of genotypes were resistant to stripe rust and stem rust pathogen races. The durum panel genotyped using Illumina iSelect 90 K wheat SNP assay was used for genome-wide association mapping (GWAS). The GWAS revealed 64 marker-trait associations (MTAs) representing six leaf rust resistance loci located on chromosome arms 2AS, 2AL, 5BS, 6AL, and 6BL. Two of these loci were identified at the positions of Lr52 and Lr64 genes, whereas the remaining loci are most likely novel. A total of 46 MTAs corresponding to four loci located on chromosome arms 1BS, 5BL, and 7BL were associated with stripe rust response. None of these loci correspond to designated stripe rust resistance genes. For stem rust, a total of 260 MTAs, representing 22 loci were identified on chromosome arms 1BL, 2BL, 3AL, 3BL, 4AL, 5AL, 5BL, 6AS, 6AL, 6BL, and 7BL. Four of these loci were located at the positions of known genes/alleles (Sr7b, Sr8155B1, Sr13a, and Sr13b). The discovery of known and novel rust resistance genes and their linked SNPs will help diversify rust resistance in durum wheat.

Genetic analysis of resistance to bacterial blight in rice

Genome ◽  
1988 ◽  
Vol 30 (3) ◽  
pp. 299-302 ◽  
Author(s):  
S. C. Prasad ◽  
J. B. Tomar
Keyword(s):  
Resistance Genes ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Susceptible Cultivar ◽  
Inheritance Of Resistance ◽  
Single Recessive Gene ◽  
Clipping Technique ◽  
Mode Of Inheritance

The mode of inheritance of resistance to bacterial blight, Xanthomonas campestris pv. Oryzae was studied in 12 rice cultivars: 'BR51-282-8', 'DV85', 'CAS209', 'Java14', 'IR4613-54-5', 'Zenith', 'IR36', 'Neuli', 'BJ1', 'LZN', 'MRC603-303', and 'D204-1'. These resistance cultivars were crossed with a susceptible tester parent 'TN1'. The plants were inoculated at the maximum tillering stage by the clipping technique. From the reactions of F1, F2, and F3 populations, it was found that resistance in 'LZN', 'MRC603-303', and 'D204-1' was conditioned by a single recessive gene. The resistance in 'BR51-282-8', 'DV85', 'CAS209', 'Javal4', 'IR4613-54-5', 'Zenith', 'IR36', 'Neuli', and 'BJ1' was controlled by a single dominant gene. The allelic relationships of resistance genes in the test cultivars with Xa4 was studied. The Xa4 gene was originally identified and designated in 'IR22'. The resistance genes in the test cultivars were nonallelic to Xa4. The trisomie lines of 'IR36' were crossed with 'Jaya', a highly susceptible cultivar to bacterial blight. The segregation pattern of the F2 and backcross generations revealed that the resistance gene of 'IR36' was located on chromosome 12 of the rice genome.Key words: rice, resistance, bacterial blight, allelic relationship, trisomics.

scholarly journals Mapping of resistance genes to races 1, 3 and 5 of Podosphaera xanthii in melon PI 414723

2013 ◽  
Vol 13 (4) ◽  
pp. 349-355 ◽  
Author(s):  
Ana Carolina Fazza ◽  
Leandro José Dallagnol ◽  
Ana Cristina Fazza ◽  
Carolina C. Monteiro ◽  
Bruno Marco de Lima ◽  
...  
Keyword(s):  
Linkage Group ◽  
Genetic Map ◽  
Resistance Genes ◽  
Segregation Analysis ◽  
Specific Resistance ◽  
Dominant Gene ◽  
Inheritance Of Resistance ◽  
Podosphaera Xanthii ◽  
Single Dominant Gene ◽  
First Time

The fungus Podosphaera xanthii affects melon crops and presents several races controlled by race-specific resistance genes. The accession PI 414723 is resistant to races 1, 3 and 5 and it is a suitable source of resistance genes. The inheritance of resistance to these races was analyzed on 87 F2 plants from the cross of PI 414723 × Védrantais, and resistance to all three races could be explained by the segregation of a single dominant gene, although a digenic model could also be accepted. A genetic map was assembled with 206 markers, and co-segregation analysis of resistance phenotypes indicated the existence of two linked loci in linkage group II, one conferring resistance to races 1 and 5 (denominated Pm-x1,5), and the second to race 3 (denominated Pm-x3), located 5.1 cM apart. This study reports for the first time the existence of Pm-x3 and the genetic locations of these resistance genes from PI 414723.

scholarly journals Inheritance of Virulence and Linkages of Virulence Genes in an Ethiopian Isolate of the Wheat Stripe Rust Pathogen (Puccinia striiformis f. sp. tritici) Determined Through Sexual Recombination on Berberis holstii (Retracted)

Plant Disease ◽  
2019 ◽  
Vol 103 (9) ◽  
pp. 2451-2459 ◽  
Author(s):  
Gebreslasie Zeray Siyoum ◽  
Qingdong Zeng ◽  
Jie Zhao ◽  
Xianming Chen ◽  
Ayele Badebo ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Stripe Rust ◽  
Resistance Genes ◽  
Puccinia Striiformis ◽  
Dominant Gene ◽  
Wheat Diseases ◽  
Rust Pathogen ◽  
Parental Isolate ◽  
Dominant Genes ◽  
Yr Genes

The authors of Siyoum et al. 103:2451-2459 (2019) retracted this article because it proved to contain errors in statistical analyses of the data and subsequent data interpretations. This article was retracted on 14 November 2019. Stripe rust, caused by Puccinia striiformis f. sp. tritici, is one of the most devastating wheat diseases in Ethiopia. To study virulence genetics of the pathogen, 117 progeny isolates were produced through sexual reproduction of an Ethiopian isolate of the stripe rust pathogen on Berberis holstii plants under controlled conditions. The parental and progeny isolates were characterized by phenotyping on wheat lines carrying single Yr genes for resistance and genotyped using 10 polymorphic simple sequence repeated (SSR) markers. The progeny isolates were classified into 37 virulence phenotypes and 75 multilocus genotypes. The parental isolate and progeny isolates were all avirulent to resistance genes Yr5, Yr10, Yr15, Yr24, Yr32, YrTr1, YrSP, and Yr76 but virulent to Yr1 and Yr2, indicating that the parental isolate was homozygous avirulent or homozygous virulent at these loci. The progeny isolates segregated for virulence to 12 Yr genes. Virulence phenotypes to Yr6, Yr28, Yr43, and Yr44 were controlled by a single dominant gene; those to Yr7, Yr9, Yr17, Yr27, Yr25, Yr31, and YrExp2 were each controlled by two dominant genes; and the virulence phenotype to Yr8 was controlled by two complementary dominant genes. A linkage map was constructed with seven SSR markers, and 16 virulence loci corresponding to 11 Yr resistance genes were mapped with some loci linked to each other. These results are useful in understanding host–pathogen interactions and selecting resistance genes to develop wheat cultivars with highly effective resistance to stripe rust.

scholarly journals Inheritance of resistance to races 69 and 453 of Colletotrichum lindemuthianum in the common bean

2000 ◽  
Vol 43 (5) ◽  
pp. 479-485 ◽  
Author(s):  
Juliana P. Poletine ◽  
M.C. Gonçalves-Vidigal ◽  
Pedro S. Vidigal Filho ◽  
Carlos Alberto Scapim ◽  
Lucas Silvério ◽  
...  
Keyword(s):  
Common Bean ◽  
Resistance Genes ◽  
Colletotrichum Lindemuthianum ◽  
Spore Suspension ◽  
Inheritance Of Resistance ◽  
Anthracnose Resistance ◽  
Segregation Data ◽  
The Common ◽  
Dominant Genes

The cultivars, AB 136 and G 2333 both resistant to Colletotrichum lindemuthianum races 69 and 453, were crossed with the cultivars Michelite and Perry Marrow (susceptible to both races), with Dark Red Kidney and Cornell 49242 (resistant to both races) and F1 and F2 generations were obtained. Plants were inoculated using a spore suspension at 1.2 x 10(6) concentration. The reaction of F1 and F2 populations showed that Dark Red Kidney, Cornell 49242 and AB 136 cultivars had the dominant genes A (Co-1), Are (Co-2) and Co-6, respectively, was conferring resistance to races 69 and 453. The segregation data obtained from F2 populations indicated that G 2333 carried two dominant resistance genes Co-5 gene and another one Co-7 for 69 and 453 races. The dominant genes in G 2333 and its resistance to C. lindemuthianum race could be transferred to provide anthracnose resistance to susceptible cultivars relatively easy.

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