Inheritance of resistance to Fusarium oxysporum f. sp. lycopersici races 2 and 3 in Lycopersicon pennellii

1987 ◽  
Vol 38 (4) ◽  
pp. 729 ◽  
Author(s):  
DJ McGrath ◽  
D Gillespie ◽  
L Vawdrey
Keyword(s):  
Fusarium Oxysporum ◽  
Dominant Gene ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Tomato Cultivar ◽  
Lycopersicon Pennellii ◽  
Race 2 ◽  
Dominant Genes

An accession of Lycopersicon pennellii, PI414773, was resistant to race 2 isolate 18947 and race 3 isolate 14844 of Fusarium oxysporum f. sp. lycopersici. Tomato cultivar Contender, which is homozygous for gene 1-2, was resistant to race 2 but susceptible to race 3 of the pathogen. Cultivar Rouge de Marmande was susceptible to both race 2 and race 3. The inheritance of resistances to race 2 and race 3 in PI414773 was investigated in test crosses involving parents Contender, Rouge de Marmande and PI414773. Segregation of the F2 of the crosses Rouge de Marmande x PI414773 and Contender x PI414773 revealed that resistance to race 2 in PI414773 was controlled by two independent dominant genes, one of which is allelic with gene I-2. Segregations in F2, backcrosses and inbred backcrosses derived from Contender x PI414773 indicated that a single dominant gene conferred resistance to race 3. The symbol I-3 was proposed for this gene.

THE INHERITANCE OF LOOSE SMUT RESISTANCE.: I. THE INHERITANCE OF RESISTANCE IN FOUR BARLEY VARIETIES IMMUNE TO RACE 2 OF LOOSE SMUT

1962 ◽  
Vol 42 (1) ◽  
pp. 69-77 ◽  
Author(s):  
E. N. Larter ◽  
H. Enns
Keyword(s):  
Disease Resistance ◽  
Dominant Gene ◽  
The Other ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Loose Smut ◽  
Race 2 ◽  
Or Genes ◽  
Dominant Genes

Four barley varieties, each immune to a Valki-attacking culture of loose smut (designated as race 2), were studied with respect to the inheritance of their resistance. Jet (C.I. 967) and Nigrinudum (C.I. 2222) were each found to possess two independent dominant genes determining resistance. Steudelli (C.I. 2266) proved to be immune to race 2 through the action of a single dominant gene, while resistance of Hillsa (C.I. 1604) was found to be conditioned by two complementary dominant genes. The absence of susceptible F3 families in crosses between Jet, Nigrinudum, and Steudelli indicated that these three varieties have in common a gene or genes for resistance to the race of smut used. The two complementary genes for resistance in Hillsa proved to be distinct from those of the other three varieties under study.The use of genetic analyses of disease resistance based upon classification of F3 families of the backcross to the resistant source is described and the merits of such a method are discussed.

THE INHERITANCE OF LOOSE SMUT RESISTANCE.: II. THE INHERITANCE OF RESISTANCE IN THREE BARLEY VARIETIES IMMUNE TO RACE 2

1962 ◽  
Vol 42 (4) ◽  
pp. 707-710 ◽  
Author(s):  
E. N. Larter
Keyword(s):  
Dominant Gene ◽  
Unknown Origin ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Loose Smut ◽  
The Subject ◽  
Race 2 ◽  
Dominant Genes

The inheritance of smut resistance in two introductions of Abyssinian origin, Abyssinian (C.I. 668) and an unnamed variety C.I. 5798, as well as a variety of unknown origin, Kitchin (C.I. 1296), was the subject of study.From the results it was concluded that resistance in each variety is governed by a single dominant gene and that this one gene is common to all three varieties. Moreover, the varieties Steudelli (C.I. 2266) and Jet (C.I. 967), which were shown from a previous study to possess one and two dominant genes for resistance respectively, were found to possess the same gene as the three resistant stocks under study.

INHERITANCE OF CROWN RUST RESISTANCE IN THREE ACCESSIONS OF AVENA STERILIS

1980 ◽  
Vol 22 (1) ◽  
pp. 27-33 ◽  
Author(s):  
D. E. Harder ◽  
R. I. H. McKenzie ◽  
J. W. Martens
Keyword(s):  
Rust Resistance ◽  
Dominant Gene ◽  
Crown Rust ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Avena Sterilis ◽  
Oat Crown Rust ◽  
Crown Rust Resistance ◽  
Resistance Spectrum ◽  
Dominant Genes

The inheritance of resistance to oat crown rust was studied in three accessions of Avena sterilis L. Accession CAV 4274 originated from Morocco, CAV 4540 from Algeria, and CAV 3695 from Tunisia. Seedling rust tests on F2 backcross families indicated the presence of two dominant genes for crown rust resistance in CAV 4274. One of these, a gene conditioning resistance to most races tested, was linked or allelic to gene Pc-38, and was designated gene Pc-62. The second gene conferred resistance only to one of the six races studied, and was not tested further. In CAV 4540, a single dominant gene, Pc-63 was possibly allelic with Pc-62 and linked or allelic to Pc-38. Genes Pc-62 and 63 are generally similar to Pc-38 in their resistance spectrum, but these three genes are differentiated by races CR 102, CR 103, and CR 107. A single dominant gene in CAV 3695 appeared to be Pc-50.

Inheritance of resistance to rust (Phakopsora pachyrhizi) in soybeans

1980 ◽  
Vol 31 (5) ◽  
pp. 951 ◽  
Author(s):  
RJ McLean ◽  
DE Byth
Keyword(s):  
Dominant Gene ◽  
Soybean Rust ◽  
Inheritance Of Resistance ◽  
Phakopsora Pachyrhizi ◽  
Single Dominant Gene ◽  
Dominant Genes

A study was conducted to determine the inheritance of resistance to soybean rust in three soybean accessions-PI200492, Tainung 3 and Tainung 4. The results suggest that PI200492 and Tainung 3 contain the same single dominant gene for resistance, and that Tainung 4 contains two dominant genes for resistance, one of which is identical with that in PI200492 and Tainung 3.

INHERITANCE OF RESISTANCE TO LOOSE SMUT, COVERED SMUT AND FALSE LOOSE SMUT IN THE BARLEY VARIETY JET

1962 ◽  
Vol 42 (1) ◽  
pp. 176-189 ◽  
Author(s):  
D. R. Metcalfe
Keyword(s):  
Close Association ◽  
Dominant Gene ◽  
Barley Variety ◽  
The Other ◽  
Puccinia Graminis ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Loose Smut ◽  
Ustilago Hordei ◽  
Dominant Genes

The inheritance of reaction to single cultures of Ustilago nuda (Jens.) Rostr., Ustilago nigra Tapke, and Ustilago hordei (Pers.) Lagerh. was studied in the F1, F2 and F3 generations of crosses between the resistant barley variety Jet and the susceptible varieties Vantage and Plush. It was concluded that Jet has a single dominant gene for resistance of U. nuda and probably dominant genes for resistance of U. nigra and U. hordei. A close association was detected, in the segregating populations, between the reactions to U. nigra and U. hordei. No association was detected between resistance to U. nuda and resistance to the other two smut species. No associations were found between reaction to any of the three smut species and the genes responsible for the following marker characters: resistance vs. susceptibility to Puccinia graminis tritici Eriks. and Henn. (Tt), two- vs. six-row spike (Vv), naked vs. hulled kernel (Nn), black vs. white lemma and pericarp (Bb), and rough vs. smooth awn (Rr).

The inheritance of resistance to Puccinia coronata and of floret characters in Avena sterilis

1983 ◽  
Vol 25 (4) ◽  
pp. 329-335 ◽  
Author(s):  
L. S. L. Wong ◽  
R. I. H. McKenzie ◽  
D. E. Harder ◽  
J. W. Martens
Keyword(s):  
Rust Resistance ◽  
Dominant Gene ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Inheritance Of Resistance ◽  
Avena Sterilis ◽  
Field Isolates ◽  
Crown Rust Resistance ◽  
Dominant Genes

The inheritance of resistance to Puccinia coronata, awn development, lemma pubescence, and lemma color were studied in the Avena sterilis accessions CAV 4248, CAV 4656, and CAV 4904. Three independent, partially dominant genes (Pc-64, Pc-65, Pc-66) in CAV 4248, one partially dominant gene (Pc-67) in CAV 4656, and a dominant gene (Pc-68) in CAV 4904 were identified which conferred resistance to P. coronata. Genes Pc-64, Pc-65, Pc-66, Pc-67, and Pc-68 conferred resistance to 13, 8, 6, 12, and 14 races, respectively, of the 14 races of P. coronata tested. Gene Pc-68 conferred resistance to all field isolates of P. coronata collected in Canada in 1981 and was found to be closely linked or allelic to gene Pc-46. Awns and lemma pubescence were inherited monogenically in crosses with all three CAV accessions. Grey lemma color was controlled by one gene in CAV 4248 and by two genes in CAV 4656. Brown lemma color was controlled by one gene, which was closely linked or pleiotropic with the gene for lemma pubescence in CAV 4904. There was no association between crown rust resistance and the three floret characters studied.

scholarly journals Fusarium Oxysporum F. Sp. Radicis-Lycopersici – the Cause of Fusarium Crown and Root Rot in Tomato Cultivation

2013 ◽  
Vol 53 (2) ◽  
pp. 172-176 ◽  
Author(s):  
Wojciech Szczechura ◽  
Mirosława Staniaszek ◽  
Hanna Habdas
Keyword(s):  
Fusarium Oxysporum ◽  
Fruit Quality ◽  
Root Rot ◽  
Dominant Gene ◽  
Chromosome 9 ◽  
Single Dominant Gene ◽  
Specific Enzyme ◽  
Vegetative Compatibility Groups ◽  
Field Crops ◽  
Crown And Root Rot

Abstract Fusarium oxysporum f. sp. radicis-lycopersici (FORL) leading to fusarium crown and root rot is one of the most destructive soilborne diseases of tomatoes occurring in greenhouse and field crops. Physiological races of FORL were not defined but nine vegetative compatibility groups (VGCs) were identified. Infection followed by wounds and natural holes and infection is not systemic. The optimum soil temperature for pathogen development is 18°C. Infection may cause plants to wilt and die completely or infection may lower fruit quality. Fusarium oxysporum f. sp. radicis-lycopersici has the ability to produce a specific enzyme, tomatinase, which breaks down α-tomatine and protects the pathogen. In contrast tomato also has a defence system which consists of the enzymes chitinase and β-1, 3-glucanase. Tomato resistance to Fusarium oxysporum f. sp. radicis-lycopersici is determined by a single dominant gene Frl, localized on the long arm of chromosome 9. It was introduced to cultivars from Licopersicum peruvianum (L.) Mill.

scholarly journals Inheritance of Resistance to Fusarium oxysporum f. sp. radicus-lycopersici, Causal Organism of Fusarium Crown and Root Rot in Tomato from Lycopersicon pennellii LA 1277

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 449D-449
Author(s):  
J.W. Scott ◽  
J.P. Jones
Keyword(s):  
Fusarium Oxysporum ◽  
Root Rot ◽  
Dominant Gene ◽  
Susceptible Parent ◽  
Causal Organism ◽  
Breeding Programs ◽  
Lycopersicon Pennellii ◽  
Resistant Lines ◽  
Tomato Breeding ◽  
Crown And Root Rot

Lycopersicon pennellii accession LA 1277 was crossed to tomato (L. esculentum) and the F1 was backcrossed to tomato. Self-pollinated seed was saved from backcross plants and seedlings derived were inoculated with Fusarium oxysporum Schlecht f.sp. radicus-lycopersici Jarvis and Shoemaker, the causal agent of Fusarium crown and root rot (FCRR). Seed was saved from resistant plants that were self-pollinated and screened until homozygous resistance was verified five generations after the backcross. Three homozygous lines were crossed to Fla. 7547, a tomato breeding line susceptible to FCRR but resistant to Fusarium wilt races 1, 2, and 3. Subsequently, backcrosses were made to each parent and F2 seed were obtained. The three homozygous FCRR-resistant lines were also crossed to Ohio 89-1, which has a dominant gene for FCRR resistance presently being used in breeding programs. F2 seed were obtained from these crosses. These generations were inoculated with the FCRR pathogen. The resistant parents, F1, and backcross to the resistant parents were all healthy. The backcross to the susceptible parent and the F2 segregated healthy to susceptible plants in 1:1 and 3:1 ratios, respectively. Thus, the resistance from LA 1277 was inherited as a single dominant gene. This gene was different than the gene from Ohio 89-1 because susceptible segregants were detected in the F2 generation derived from the two resistant sources.

scholarly journals First Report of Race 3 of Fusarium oxysporum f. sp. lycopersici in Southeastern Florida

Plant Disease ◽  
2000 ◽  
Vol 84 (2) ◽  
pp. 199-199
Author(s):  
R. C. Ploetz ◽  
J. L. Haynes
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Personal Communication ◽  
Crown Rot ◽  
Basal Cells ◽  
Single Spore ◽  
Tomato Cultivar ◽  
Race 1 ◽  
Race 2 ◽  
Research And Education

Race 3 of Fusarium oxysporum f. sp. lycopersici, cause of Fusarium wilt of tomato, Lycopersicon esculentum, was first recognized in Florida in 1982 on the west coast (Hillsborough and Manatee counties) (2). Approximately 10 years later, race 3 was reported in northeastern production areas of the state (Gadsden County) (1) and was observed on the east coast (Ft. Pierce area) (D. O. Chellemi, personal communication). During the 1998 to 1999 season, mature plants of Sanibel, a commercial tomato cultivar with resistance to races 1 and 2, were observed with symptoms of Fusarium wilt at the University of Florida's Tropical Research and Education Center in Homestead. Approximately 20% of the plants were conspicuously wilted, chlorotic, and necrotic in all or unilateral portions of the canopy. Internal, vascular discoloration in affected plants extended far into the canopy, distinguishing the disease from Fusarium crown rot, caused by F. oxysporum f. sp. radicis-lycopersici. Pure colonies of fungi were isolated from surface-disinfested (10 s with 70% ethanol, 2 min with 10% bleach) stem segments on potato dextrose agar (PDA) amended with streptomycin (100 mg/liter), rifamycin (50 mg/liter), and a commercial miticide (Danitol 2EHC [4 drops/liter]). Isolates were identified as F. oxysporum due to their production of typical falcate macroconidia with foot-shaped basal cells, microconidia borne in false heads only on mono-phialides, and chlamydospores. In replicated (three) greenhouse trials, six single-spore isolates were used to root-dip inoculate (107 conidia per ml) seedlings of differential tomato cultivars (Bonnie Best, no resistance; Manapal, race 1 resistance; Walter, race 1 and race 2 resistance). All isolates were pathogenic on each of the differential cultivars, and one isolate, 2-1, caused severe damage on Walter (mean rating of 3.5 on a 1 to 5 scale). The results were repeated in a second trial with the most virulent isolate. In both trials, pure colonies of F. oxysporum were recovered from symptomatic seedlings. Southeastern Florida is the last major tomatoproduction area in Florida to be affected by race 3 of F. oxysporum f. sp. lycopersici. References: (1) D. O. Chellemi and H. A. Dankers. Plant Dis. 76:861, 1992. (2) R. B. Volin and J. P. Jones. Proc. Fla. State Hortic. Soc. 95:268, 1982.

scholarly journals The Inheritance and Association of Rust (Uromyces apendiculatus) Resistance and Foliar Abnormalities in Phaseolus vulgaris L.

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 823A-823
Author(s):  
J.M. Bokosi ◽  
D.P. Coyne ◽  
J.R. Steadman ◽  
D. O'Keefe ◽  
J. Reiser
Keyword(s):  
Phaseolus Vulgaris ◽  
Specific Resistance ◽  
Dominant Gene ◽  
Hybrid Plant ◽  
Single Dominant Gene ◽  
Phaseolus Vulgaris L ◽  
Recessive Genes ◽  
Dominant Genes

The inheritance of specific resistance (SR) and foliar abnormalities (FA) were studied in the F2 and F3 progeny of the following crosses; `PC-50' × Chichara 83-10, `PC-50' × `EZ Pick', A-10-2 × GN `Beryl', and A-10-2 × P114. A single dominant gene controlled SR to rust strain US85NP10-1 in `PC-50' × Chichara 83-10. Duplicate recessive genes determined foliar crippling (FC) in `PC-50' × Chichara 83-10 and A-10-2 × P114. The inheritance of hybrid plant abnormality in `PC-50' × `EZ Pick' and A-10-2 × GN `Beryl' differed from previously reported complementary dominant genes or duplicate recessive genes. Foliar variegation (FV) was controlled by duplicate recessive genes in `PC-50' × Chichara 83-10 and by triplicate recessive genes in `PC-50' × `EZ Pick', A-10-2 × GN `Beryl', and A-10-2 × P114. No associations were detected between SR and FC, SR and FV, or FC and FV.

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