ADULT PLANT REACTION TO STEM RUST OF LINES OF MARQUIS WHEAT WITH SUBSTITUTED GENES FOR RESISTANCE

1962 ◽  
Vol 42 (1) ◽  
pp. 163-168 ◽  
Author(s):  
G. J. Green ◽  
D. R. Knott
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Adult Stage ◽  
Stem Rust Resistance ◽  
Seedling Stage ◽  
Adult Plant ◽  
Substitution Lines

The adult plant reactions to eight races of stem rust were determined for nine lines of Marquis wheat carrying identified genes for stem rust resistance, three lines of the variety Chinese into which single chromosomes of Red Egyptian had been substituted, and six parental varieties. The adult plant reactions of the Marquis lines carrying the genes Sr6, Sr7, and Sr8 resembled the seedling reactions. The Marquis line carrying Sr9a from Kenya 117A and Sr9b from Red Egyptian were similar in adult plant reaction although they differed in seedling reaction to a culture of race 29-1 (Can.). Two lines of Marquis carrying Sr10 were resistant in the adult stage to races 56 and 29-1 (Can.) which can attack them in the seedling stage. The reactions of the substitution lines and the Marquis lines carrying the same genes were similar, although the substitution lines were more susceptible to some races.

scholarly journals Genomic Selection for Quantitative Adult Plant Stem Rust Resistance in Wheat

2014 ◽  
Vol 7 (3) ◽  
Author(s):  
Jessica E. Rutkoski ◽  
Jesse A. Poland ◽  
Ravi P. Singh ◽  
Julio Huerta‐Espino ◽  
Sridhar Bhavani ◽  
...  
Keyword(s):  
Genomic Selection ◽  
Stem Rust ◽  
Rust Resistance ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Plant Stem ◽  
Selection For

THE INHERITANCE OF REACTION TO BLACK STEM RUST OF WHEAT IN A DICOCCUM × VULGARE CROSS

1929 ◽  
Vol 1 (2) ◽  
pp. 163-188 ◽  
Author(s):  
J. B. Harrington ◽  
W. K. Smith
Keyword(s):  
Plant Breeding ◽  
Stem Rust ◽  
Rust Resistance ◽  
Genetic Factor ◽  
Stem Rust Resistance ◽  
Seedling Stage ◽  
Genetical Study ◽  
Seed Shape ◽  
Seedling Resistance ◽  
Black Stem Rust

A genetical study of resistance of wheat to black stem rust, and a plant breeding attack on the rust problem are described. A large F2 population of the cross Vernal (T. dicoccum) × Marquis (T. vulgare) was grown under severe natural epidemic conditions in the field and hundreds of F3 progenies were exposed in the seedling stage, under controlled conditions, to pure physiologic forms of rust. In the field Vernal is highly resistant and Marquis susceptible to most forms of stem rust. Resistance in the field proved incompletely dominant and appeared to be governed by a single genetic factor. Marquis and Vernal were found to differ by one main genetic factor, Rb, for seedling reaction to form 21. This factor Rb, carried by Vernal, also governs seedling resistance to forms 17, 29 and 36 and appears to be responsible for the slight seedling resistance of Vernal to form 27. There was some evidence that the factor Rb is the same factor that controls the resistance of the F2 plants to the forms of rust in the field (forms 17, 21, 29 and 36 were known to be present.) A different factor Ra causes the resistance of Marquis seedlings to form 27. Vernal resistance was not found to be associated closely with the seed shape of that variety nor with its adherence of glumes to the seed.

Seedling resistances to rust diseases in international triticale germplasm

2010 ◽  
Vol 61 (12) ◽  
pp. 1036 ◽  
Author(s):  
J. Zhang ◽  
C. R. Wellings ◽  
R. A. McIntosh ◽  
R. F. Park
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Stem Rust ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Rust Diseases

Seedling resistances to stem rust, leaf rust and stripe rust were evaluated in the 37th International Triticale Screening Nursery, distributed by the International Wheat and Maize Improvement Centre (CIMMYT) in 2005. In stem rust tests, 12 and 69 of a total of 81 entries were postulated to carry Sr27 and SrSatu, respectively. When compared with previous studies of CIMMYT triticale nurseries distributed from 1980 to 1986 and 1991 to 1993, the results suggest a lack of expansion in the diversity of stem rust resistance. A total of 62 of 64 entries were resistant to five leaf rust pathotypes. In stripe rust tests, ~93% of the lines were postulated to carry Yr9 alone or in combination with other genes. The absence of Lr26 in these entries indicated that Yr9 and Lr26 are not genetically associated in triticale. A high proportion of nursery entries (63%) were postulated to carry an uncharacterised gene, YrJackie. The 13 lines resistant to stripe rust and the 62 entries resistant to leaf rust represent potentially useful sources of seedling resistance in developing new triticale cultivars. Field rust tests are needed to verify if seedling susceptible entries also carry adult plant resistance.

Transfer to hexaploid wheat of linked genes for adult-plant leaf rust and seedling stem rust resistance from an amphiploid of Aegilops speltoides × Triticum monococcum

Genome ◽  
1990 ◽  
Vol 33 (4) ◽  
pp. 530-537 ◽  
Author(s):  
E. R. Kerber ◽  
P. L. Dyck
Keyword(s):  
Leaf Rust ◽  
Resistance Genes ◽  
Stem Rust ◽  
Rust Resistance ◽  
Dominant Gene ◽  
Leaf Rust Resistance ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Aegilops Speltoides ◽  
Plant Leaf

A partially dominant gene for adult-plant leaf rust resistance together with a linked, partially dominant gene for stem rust resistance were transferred to the hexaploid wheat cultivar 'Marquis' from an amphiploid of Aegilops speltoides × Triticum monococcum by direct crossing and backcrossing. Pathological evidence indicated that the alien resistance genes were derived from Ae. speltoides. Differential transmission of the resistance genes through the male gametes occurred in hexaploid hybrids involving the resistant 'Marquis' stock and resulted in distorted segregation ratios. In heterozygotes, pairing between the chromosome arm with the alien segment and the corresponding arm of the normal wheat chromosome was greatly reduced. The apparent close linkage between the two resistance genes, 3 ± 1.07 crossover units, was misleading because of this decrease in pairing in the presence of the 5B diploidizing mechanism. The newly identified gene for adult-plant leaf rust resistance, located on chromosome 2B, is different from adult-plant resistance genes Lr12, Lr13, and Lr22 and from that in the hexaploid accession PI250413; it has been designated Lr35. It is not known whether the newly transferred gene for stem rust resistance differs from Sr32, also derived from Ae. speltoides and located on chromosomes 2B.Key words: hexaploid, Triticum, Aegilops, aneuploid, Puccinia graminis, Puccinia recondita.

Virulence Characterization of Puccinia graminis f. sp. avenae and Resistance of Oat Cultivars in China

Plant Disease ◽  
2021 ◽  
Author(s):  
Tianya Li ◽  
Yiwei Xu ◽  
Xue Zhang ◽  
Xian Xin Wu ◽  
Yazhao Zhang ◽  
...  
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Cost Effective ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Puccinia Graminis ◽  
Resistant Cultivars ◽  
Oat Cultivars ◽  
First Time

Oat stem rust, caused by Puccinia graminis f. sp. avenae (Pga), is one of the most devastating diseases of oat. The most cost-effective and eco-friendly strategy to control this disease is the use of resistant cultivars. However, P. graminis f. sp. avenae can overcome the resistance of cultivars by rapidly changing its virulence. Thus, information on the virulence of P. graminis f. sp. avenae populations and resistance of cultivars is critical to control the disease. The current study was conducted to monitor the virulence composition and dynamics in the P. graminis f. sp. avenae population in China and to evaluate resistance of oat cultivars. Oat leaves naturally infected by P. graminis f. sp. avenae were collected during 2018 and 2019 and 159 isolates were derived from single uredinia. The isolates were tested on 12 international differential lines, and eight races, TJJ, TBD, TJB, TJD, TJL, TJN, TGD, and TKN, were identified for the first time in China. The predominant race was TJD, virulent against Pg1, Pg2, Pg3, Pg4, Pg8, Pg9, and Pg15, accounting for 35.8% and 37.8% in 2018 and 2019, respectively. The sub-predominant races were TJN (30.2% in 2018, 28.3% in 2019) and TKN (20.8% in 2018, 12.3% in 2019). All isolates were virulent to Pg1, Pg2, Pg3, and Pg4, and avirulent to Pg6 and Pg16. The three predominant races (TJD, TJN, and TKN) were used to evaluate resistance in 30 Chinese oat cultivars at the seedling and adult-plant stages. Five cultivars, Bayan 1, Baiyan 2, Baiyan 3, Baiyan 5, and Baiyan 9, were highly resistant to the three races at both seedling and adult-plant stages. The results of the virulences and frequencies of P. graminis f. sp. avenae races and the resistant cultivars will be useful in understanding the pathogen migration and evolution and for breeding oat cultivars with stem rust resistance.

The field reaction to stem rust of 'Chinese Spring' substitution lines carrying chromosomes from 'Hope' and 'Thatcher' wheats

1986 ◽  
Vol 28 (1) ◽  
pp. 12-16
Author(s):  
D. R. Knott
Keyword(s):  
Stem Rust ◽  
Chinese Spring ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Triticum Aestivum L ◽  
Adult Plant ◽  
Puccinia Graminis ◽  
Substitution Lines ◽  
Field Reaction ◽  
Rust Severity

Studies were done in an attempt to determine the inheritance of adult plant resistance to stem rust (Puccinia graminis f. sp. tritici Eriks. and E. Henn.) in the wheat (Triticum aestivum L.) cultivars 'Hope' and 'Thatcher'. 'Chinese Spring' substitution lines carrying individual chromosomes from 'Hope' and 'Thatcher' were tested in field rust nurseries, three times each with races 15B-1 and 56, and twice with multirace mixtures. In 1976 it was found that the date of heading often had a significant effect on rust severity, with early lines showing less rust. In 1977 and 1984 the lines were divided into three groups based on maturity and were planted on three dates about 10 days apart to make heading dates more uniform. The data indicate that 'Hope' has genes for resistance to race 56 on chromosomes 3B (Sr2) and 4D, and to a multirace mixture on 1B, 3B, and 7B. 'Thatcher' possibly has genes for resistance to race 56 on chromosomes 6A and 3B (Sr12). The results show that the resistance of both cultivars is complex and most genes have only small effects.Key words: Triticum, Puccinia, rust resistance, substitution lines.

Mapping adult plant stem rust resistance in barley accessions Hietpas-5 and GAW-79

2018 ◽  
Vol 131 (10) ◽  
pp. 2245-2266 ◽  
Author(s):  
Austin J. Case ◽  
Sridhar Bhavani ◽  
Godwin Macharia ◽  
Zacharias Pretorius ◽  
Vicky Coetzee ◽  
...  
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Plant Stem
Sign in / Sign up

Export Citation Format

Share Document