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.

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.

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 LOOSE SMUT AND COVERED SMUT IN THE OAT VARIETIES BLACK MESDAG, CAMAS, AND RODNEY

1969 ◽  
Vol 11 (4) ◽  
pp. 919-923 ◽  
Author(s):  
W. J. Cherewick ◽  
R. I. H. McKenzie
Keyword(s):  
Susceptible Variety ◽  
The Other ◽  
Inheritance Of Resistance ◽  
Loose Smut

F3 lines from three smut resistant oat varieties crossed with the susceptible variety Anthony were inoculated with compatible monosporidial lines of two inbred races of Ustilago avenae and one inbred race of U. kolleri. Rodney, Black Mesdag, and Camas each have one gene conferring resistance to two races of U. avenae and to one race of U. kolleri. Black Mesdag and Camas have a second gene, conferring resistance to the U. kolleri race. F3 lines from the Black Mesdag × Anthony cross were inoculated with teliospores of a U. avenae race virulent on all varieties except Black Mesdag. One gene in Black Mesdag conferred resistance to this and the other races used. F3 lines from a cross between Camas and Black Mesdag segregated, indicating that these varieties have genes for smut resistance at different loci.

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 LOOSE SMUT RESISTANCE: II. INHERITANCE OF RESISTANCE IN THREE BARLEY VARIETIES TO RACES 1, 2, AND 3 OF USTILAGO NUDA (JENS.) ROSTR.

1963 ◽  
Vol 43 (3) ◽  
pp. 390-396 ◽  
Author(s):  
D. R. Metcalfe ◽  
W. H. Johnston
Keyword(s):  
Single Gene ◽  
Winter Barley ◽  
Barley Variety ◽  
The Other ◽  
Duplicate Genes ◽  
Inheritance Of Resistance ◽  
Loose Smut ◽  
Race 1 ◽  
Ustilago Nuda ◽  
Race 2

The inheritance of resistance of the barley varieties Br. 5479–754, a derivative of Jet (C.I. 967), PR28, a derivative of C.I. 4966, and Valkie (C.I. 5748) to races 1, 2 and 3 of Ustilago nuda (Jens.) Rostr. was studied. The genes for resistance in all varieties were dominant in effect. Resistance to races 2 and 3 in Br. 5479–754 was due to a single gene and resistance to race 1 to duplicate genes. A single gene in PR28 controlled resistance to all three races. Valkie proved susceptible to race 2 and had single and independent genes for resistance to each of races 1 and 3. The genes for resistance to the various smut races in each variety was independent of those in the other two.The winter barley variety C.I. 4966 is a valuable new source of immunity to U. nuda.

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