THE INHERITANCE OF RESISTANCE TO ASCOCHYTA PISI LIB. IN PEAS

1958 ◽  
Vol 38 (2) ◽  
pp. 215-218 ◽  
Author(s):  
L. H. Lyall ◽  
V. R. Wallen
Keyword(s):  
Susceptible Variety ◽  
Inheritance Of Resistance ◽  
Ascochyta Pisi ◽  
Dominant Genes

As part of a program for breeding horticultural varieties of peas resistant to Ascochyta pisi Lib., a study was made of the inheritance of resistance to a monospore isolate of the pathogen using a cross between the resistant pea strain, Ottawa A-100, and the susceptible variety, Thomas Laxton. The results indicate that resistance to the isolate used is due to duplicate dominant genes, either one of which will give resistance.

INHERITANCE OF LOOSE SMUT RESISTANCE: I. INHERITANCE OF RESISTANCE TO A TREBI-ATTACKING CULTURE OF USTILAGO NUDA (JENS.) ROSTR. IN FIVE BARLEY VARIETIES OF ABYSSINIAN ORIGIN

1962 ◽  
Vol 42 (3) ◽  
pp. 472-480 ◽  
Author(s):  
D. R. Metcalfe ◽  
S. B. Helgason
Keyword(s):  
Immune Reaction ◽  
Susceptible Variety ◽  
Inheritance Of Resistance ◽  
Loose Smut ◽  
The Third ◽  
Ustilago Nuda ◽  
Dominant Genes

The immune reaction of the barley varieties Bifarb (C.I. 3951-3), Kitchin (C.I. 1296-1), Nigrinudum (C.I. 2222), Jet (C.I. 967), and C.I. 5798 to a Trebi-attacking culture of Ustilago nuda (Jens.) Rostr. was studied in the F2 and F3 generations of crosses between these varieties and the U. nuda susceptible variety Newal (C.I. 6088). Resistance was found to be conditioned by single dominant genes. Studies of the F3 and F4 generations of crosses among the immune varieties indicated that the genes for immunity were each located at the same locus. A study of the F3 generation of a cross between Jet and the third outer-glume mutant from Valkie (C.I. 5748), designated herein as Valkie-trd, indicated that these genes for immunity differed from that in Valkie. Because of the similarity of the genetics of reaction to U. nuda in the five varieties, it was concluded that they probably originated from a common Abyssinian ancestor.

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 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 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 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.

Genetics of rust resistance in tetraploid wheats. III. Genes for resistance to stem rust in certain Durum wheats

1967 ◽  
Vol 18 (2) ◽  
pp. 213
Author(s):  
M Ataullah
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Puccinia Graminis ◽  
Inheritance Of Resistance ◽  
Puccinia Graminis Tritici ◽  
Tetraploid Wheats ◽  
Recessive Genes ◽  
Dominant Genes

The inheritance of resistance to stem rust in four durum wheats, namely P.I.168921, P.I.173401, Gaza, and C.I.7809 was studied. The variety P.I.168921 was found to possess two dominant genes Srt1 and Srt5, P.I.173401 two recessive genes srt6 and srt7, Gaza two dominant genes Srt8 and Srt9, and C.I.7809 genes Srt33 and Srt10, for resistance to Australian strains of Puccinia graminis tritici Erikss. & Henn. It was observed that the genes srt6, srt7, Srt9, and Srt10 were independent of genes already identified. Varieties Khapli, St.464, C.I.7778, and P.I.168921 had gene Srt1Srt1 in common; and varieties St.464, C.I.7778, and C.I.7809 gene Srt3 in common.

INHERITANCE OF RESISTANCE TO ROOT ROT AND SEEDLING BLIGHT OF BARLEY CAUSED BY HELMINTHOSPORIUM SATIVUM

1965 ◽  
Vol 45 (3) ◽  
pp. 238-242 ◽  
Author(s):  
R. Loiselle
Keyword(s):  
Linkage Group ◽  
Root Rot ◽  
Inheritance Of Resistance ◽  
Seedling Blight ◽  
Helminthosporium Sativum ◽  
Dominant Genes

The inheritance of resistance to an Ottawa isolate of H. sativum was studied in two varieties of barley, Anoidium and Br. 3962-4, resistant to the root rot and seedling blight phase of the disease. Anoidium and Br. 3962-4 each possess two dominant genes for resistance. The genes in Anoidium are allelic or closely linked with those of Br. 3962-4. No linkage was detected between the gene for awn character in linkage group 7 and the genes for resistance.

scholarly journals Inheritance of resistance to Albugo candida in rape (Brassica napus L.)

1983 ◽  
Vol 25 (5) ◽  
pp. 420-424 ◽  
Author(s):  
Z. Fan ◽  
S. R. Rimmer ◽  
B. R. Stefansson
Keyword(s):  
Brassica Napus ◽  
Genetic Study ◽  
Rust Resistance ◽  
Resistant Cultivar ◽  
Inheritance Of Resistance ◽  
Brassica Napus L ◽  
Albugo Candida ◽  
White Rust ◽  
Dominant Genes

Canadian cultivars of Brassica napus are resistant to white rust caused by Albugo candida while many cultivars of this species grown in China are susceptible. Two Chinese lines susceptible to race 7, GCL, and 2282-9, and one Canadian resistant cultivar, 'Regent,' were chosen for a genetic study of resistance to this pathogen. Inheritance of white rust resistance is conditioned by independent dominant genes at three loci; these were designated Ac7-1, Ac7-2, and Ac7-3. The resistance is conferred by dominance at any one of the three loci and plants with recessive alleles at all loci are susceptible. Since different F2 and BC ratios were obtained for populations derived from different individual plants of 'Regent,' this 'Regent' population is not homogeneous for resistance to white rust. All 'Regent' plants appear to be homogeneous for resistance at two loci while, in addition, some may also carry resistance at a third locus.

The inheritance of resistance to Ascochyta pisi Lib. in Pisum sativum L.

1950 ◽  
Vol 1 (4) ◽  
pp. 382 ◽  
Author(s):  
DC Wark
Keyword(s):  
Pisum Sativum ◽  
Field Resistance ◽  
Seedling Stage ◽  
Inheritance Of Resistance ◽  
Pisum Sativum L ◽  
Spray Inoculation ◽  
Ascochyta Pisi ◽  
Modifying Effect ◽  
F1 Generation

A disease of peas caused by Ascochyta pisi is briefly described. The susceptibilities of over 200 varieties and strains of peas were tested by spray inoculation of the seedlings when they were six to eight inches in height. Austrian Winter was the least susceptible of the varieties tested. It was crossed with several other pea varieties and in all cases except one the F1 generation, when spray inoculated in the late seedling stage, was shown to be as resistant as Austrian Winter. Segregation in the F2 and later generations was such as to indicate that the resistance is due to a combination of three Mendelian factors, all of which are dominant. Other factors may have a modifying effect. A number of Austrian Winter hybrids were shown to possess considerable field resistance to the disease a t Warncoort, in the Colac district of Victoria. The resistant hybrids have all inherited some undesirable qualities from the Austrian Winter parent.

Inheritance of resistance in grain sorghum to Chilo partellus (Swinhoe)

1995 ◽  
Vol 16 (1) ◽  
pp. 83-86
Author(s):  
W. G. Wenzel ◽  
J. Van Den Berg
Keyword(s):  
Chilo Partellus ◽  
Grain Sorghum ◽  
Transgressive Segregation ◽  
Inheritance Of Resistance ◽  
Sources Of Resistance ◽  
Resistant Parent ◽  
Relative Growth ◽  
Lepidoptera Pyralidae ◽  
Antibiosis Resistance ◽  
Dominant Genes

AbstractThe inheritance of resistance in grain sorghum to the spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) was studied in F3 plants derived from crosses between nine locally adapted inbred lines and two sources of resistance. Antibiosis resistance was measured as the relative growth rate of larvae in the whorls of 6-week-old plants. Most F3 plants were either as resistant as, or more resistant than, the resistant parent. This indicated dominance of resistance over susceptibility and the occurrence of transgressive segregation. The segregation pattern in the F3 generation suggested the presence of at least four dominant genes. Two families homozygous for these genes were identified.

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