INHERITANCE OF RESISTANCE TO COVERED AND FALSE LOOSE SMUT IN THE BARLEY VARIETIES PANNIER AND EXCELSIOR

1969 ◽  
Vol 11 (2) ◽  
pp. 250-253 ◽  
Author(s):  
W. J. Cherewick ◽  
K. W. Buchannon
Keyword(s):  
Dominant Gene ◽  
Inheritance Of Resistance ◽  
Loose Smut

F3 lines of the barley crosses Odessa × Pannier and Odessa × Excelsior were subjected to tests with compatible monosporidial lines of an inbred race each of covered and false loose smut. The results indicated that both Pannier and Excelsior have one dominant gene for resistance to each of the two races and that the genes in each variety appear to be closely associated.

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.

INHERITANCE OF RESISTANCE TO USTILAGO NUDA IN BARLEY

1952 ◽  
Vol 30 (5) ◽  
pp. 525-536 ◽  
Author(s):  
William P. Skoropad ◽  
L. P. V. Johnson
Keyword(s):  
Dominant Gene ◽  
Genetic Constitution ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Loose Smut ◽  
New Gene ◽  
Ustilago Nuda ◽  
New Race

The inheritance of resistance to loose smut races Tr and Ts (a new race) was studied in several barley crosses and backcrosses in which the varieties Jet and Titan were the resistant parents. Jet is resistant to race Tr and race Ts, Titan to race Tr only. Genetical analyses were based (a) on a classification of F2 plants according to the smut reaction of their F3 progeny, and (b) on the reaction of selfed generation backcrosses involving recessive (susceptible) parents. The resistance of Titan and of Jet to Tr was found in each case to be due to a single, dominant gene, designated as Un and Un3, respectively. The resistance of Jet to Ts was also found to be due to a single, dominant gene. This is probably a "new" gene and has been provisionally designated Un6. Resistance was found to be determined by the genetic constitution of the developing embryo rather than by that of surrounding floral structures.

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 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.

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 Inheritance of Resistance to Xanthomonas campestris pv. vesicatoria Race T3 in Tomato

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 822F-822
Author(s):  
J.W. Scott ◽  
J.B. Jones ◽  
G. Cameron Somodi ◽  
R.E. Stall
Keyword(s):  
Xanthomonas Campestris ◽  
Dominant Gene ◽  
Field Resistance ◽  
Inheritance Of Resistance ◽  
Growth Chambers

Resistant Hawaii 7981 (P1) was crossed with susceptible Fla. 7060 (P2), and F1, BCP1, BCP2, and F2 generations were obtained. Hypersensitive reactions (Hr) were measured 24 and 48 hours after inoculation in growth chambers at 24 and 30C. At 30C, there was no Hr. At 24C and 24 hours, 100% of Hawaii 7981 plants, 54.2% of BCP1 plants, and 21.7% of F2 plants had Hr. At 24C and 48 hours, 100% of Hawaii 7981, the F1, and BCP1 plants; 50% of BCP2 plants; and 73.3% of F2 plants had Hr. Other plants were inoculated and rated for race T3 in the field. Disease for each generation was significantly different (P < 0.05) and their order from most to least resistant was P1, BCP1, F1, F2, BCP2, and P2. The F1s were distributed between the parents with slight overlaps. BC plants had bimodal peaks similar to the F1 and their respective parents. The F2 had three peaks corresponding to P1, F1, and P2. The data suggest Hr and field resistance are controlled by the same incompletely dominant gene.

scholarly journals New Sources of Lettuce Aphid Resistance in Lettuce

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1109A-1109
Author(s):  
James D. McCreight
Keyword(s):  
Insect Pest ◽  
Dominant Gene ◽  
The United States ◽  
Inheritance Of Resistance ◽  
Sources Of Resistance ◽  
Lactuca Virosa ◽  
Nasonovia Ribisnigri ◽  
Lactuca Serriola ◽  
Salinas Valley ◽  
Greenhouse Tests

Lettuce aphid (Nasonovia ribisnigri Mosley) is a recent insect pest to lettuce (Lactuca sativa L.) production in the United States. The single dominant gene, Nr, conditions resistance to the lettuce aphid in Lactuca virosa accession IVT280 from The Netherlands and is available in a limited number of commercial lettuce cultivars. New and genetically unique sources of resistance are sought to broaden the genetic base for resistance to the lettuce aphid. About 1200 lettuce PI lines were evaluated for resistance to lettuce aphid in greenhouse tests using a strain of lettuce aphid obtained from commercial lettuce in Salinas Valley, Calif. In 2002, plants were individually infested with five 24-hour nymphs per plant (controlled protocol), and the numbers of aphids per plant were counted 10–14 days post-infestation (dpi). Beginning in 2003, plants were mass-infested (mass protocol) with nymphs and alates of various ages and numbers. Using the mass protocol, the number of aphids per plant 10–14 dpi were estimated and categorized using a 1–5 scale where 1 = 0 aphids per plant, 2 = 1–10 aphids per plant, 3 = 11–20 aphids per plant, 4 = 21–30 aphids per plant, and 5 = >30 aphids per plant. `Salinas' and `Barcelona' were included as susceptible and resistant controls, respectively. Most of the accessions were susceptible. A few accessions had a few plants with very low numbers of aphids after repeated infestation, but their progeny were susceptible. Two accessions were highly resistant: PI 491093, a Lactuca serriola accession from Turkey, and PI 274378, a L. virosa accession from France. Inheritance of resistance in these two accessions and their allelism to Nr remains to be determined.

scholarly journals Inheritance of Resistance to the Peanut Root-knot Nematode in Capsicum chinense

2000 ◽  
Vol 125 (5) ◽  
pp. 615-618
Author(s):  
Richard L. Fery ◽  
Judy A. Thies
Keyword(s):  
Resistance Gene ◽  
Dominant Gene ◽  
Inheritance Of Resistance ◽  
Capsicum Chinense ◽  
Root Knot Nematode ◽  
Sources Of Resistance ◽  
Resistant Parent ◽  
Backcross Populations ◽  
Race 1 ◽  
Allelism Tests

Greenhouse experiments determined the inheritance of resistance to the peanut root-knot nematode [Meloidogyne arenaria (Neal) Chitwood race 1] in Capsicum chinense Jacq. germplasm lines PA-353 and PA-426. Evaluation of parental, F1, F2, and backcross populations of the crosses PA-353 × PA-350 and PA-426 × PA-350 (PA-350 is a susceptible cultigen) indicated that resistance in both C. chinense germplasm lines was conditioned by a single dominant gene. Evaluation of the F1 × resistant parent backcross populations in the cytoplasm of their respective resistant and susceptible parents indicated that the cytoplasm of the resistant parent is not needed for full expression of resistance. Allelism tests indicated that the dominant resistance gene in both PA-353 and PA-426 is allelic to a resistance gene in C. annuum L. `Carolina Cayenne'. However, these allelism tests did not demonstrate conclusively that the M. arenaria race 1 resistance gene in C. chinense is the N gene that conditions resistance to the southern root-knot nematode [Meloidogyne incognita (Kofoid & White) Chitwood] in C. annuum. The ease and reliability of evaluating plants for resistance to root-knot nematodes and the availability of simply inherited sources of resistance makes breeding for peanut root-knot nematode resistance a viable objective in C. chinense breeding programs.

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