scholarly journals Genetic Analysis of Resistance to Leaf Rust and Stripe Rust in Wheat Cultivar Francolin#1

Plant Disease ◽  
2014 ◽  
Vol 98 (9) ◽  
pp. 1227-1234 ◽  
Author(s):  
C. X. Lan ◽  
R. P. Singh ◽  
J. Huerta-Espino ◽  
V. Calvo-Salazar ◽  
S. A. Herrera-Foessel
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Genetic Basis ◽  
Adult Plant Resistance ◽  
Recombinant Inbred Lines ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Resistant Varieties ◽  
Rust Severity ◽  
Additive Genes

Leaf rust and stripe rust are important diseases of wheat and can be controlled by growing resistant varieties. We investigated the genetic basis of resistance to both rusts in 198 F5 recombinant inbred lines derived from a cross between ‘Avocet’ and ‘Francolin#1’. The population was phenotyped in greenhouse and field, and genotyped with known gene-associated molecular markers. Seedling resistance of Francolin#1 to leaf and stripe rusts was attributed to the loosely linked genes Lr16 and YrF, respectively, with a recombination frequency of 0.36. Field segregation indicated that adult plant resistance (APR) to leaf and stripe rusts was conferred by three and five additive genes, respectively. Among them, Lr46/Yr29 was associated with resistance to both rusts in Francolin#1, Lr16 reduced field leaf rust severity by 8 to 9%, and YrF contributed to 10 to 25% reductions in stripe rust severity. The Lr16 region was also associated with a 5 to 16% reduction in stripe rust severity, which is likely due to its linkage with YrF or another unidentified stripe rust APR gene. Significant additive effects on stripe rust were detected between YrF and Yr29. We conclude that APR in Francolin#1 to leaf and stripe rusts involves a combination of seedling and APR genes.

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.

scholarly journals Identification and Mapping of Adult Plant Resistance Loci to Leaf Rust and Stripe Rust in Common Wheat Cultivar Kundan

Plant Disease ◽  
2017 ◽  
Vol 101 (3) ◽  
pp. 456-463 ◽  
Author(s):  
Y. Ren ◽  
R. P. Singh ◽  
B. R. Basnet ◽  
C. X. Lan ◽  
J. Huerta-Espino ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Average Distance ◽  
Recombinant Inbred Lines ◽  
Interval Mapping ◽  
Snp Markers ◽  
Adult Plant ◽  
Additive Interaction

Leaf rust (LR) and stripe rust (YR) are important diseases of wheat worldwide. We used 148 recombinant inbred lines (RIL) from the cross of Avocet × Kundan for determining and mapping the genetic basis of adult plant resistance (APR) loci. The population was phenotyped LR and YR for three seasons in field trials conducted in Mexico and genotyped with the diversity arrays technology sequencing (DArT-Seq) and simple sequence repeat markers. The final genetic map was constructed using 2,937 polymorphic markers with an average distance of 1.29 centimorgans between markers. Inclusive composite interval mapping identified two co-located APR quantitative trait loci (QTL) for LR and YR, two LR QTL, and three YR QTL. The co-located resistance QTL on chromosome 1BL corresponded to the pleiotropic APR gene Lr46/Yr29. QLr.cim-2BL, QYr.cim-2AL, and QYr.cim-5AS could be identified as new resistance loci in this population. Lr46/Yr29 contributed 49.5 to 65.1 and 49.2 to 66.1% of LR and YR variations, respectively. The additive interaction between detected QTL showed that LR severities for RIL combining four QTL ranged between 5.3 and 25.8%, whereas the lowest YR severities were for RIL carrying QTL on chromosomes 1BL + 2AL + 6AL. The high-density DArT-Seq markers across chromosomes can be used in fine mapping of the targeted loci and development SNP markers.

THE GENETIC ANALYSIS OF TWO INTERSPECIFIC SOURCES OF LEAF RUST RESISTANCE AND THEIR EFFECT ON THE QUALITY OF COMMON WHEAT

1988 ◽  
Vol 68 (3) ◽  
pp. 633-639 ◽  
Author(s):  
P. L. DYCK ◽  
O. M. LUKOW
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Leaf Rust ◽  
Plant Resistance ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Kernel Protein

Gene Lr29 transferred from Agropyron elongatum to chromosome 7D of wheat and gene LrVPM transferred from VPM1 both segregated as single genes for seedling resistance to leaf rust when backcrossed into common wheat (Triticum aestivum). Although the seedling resistance of the VPM lines was intermediate, their adult plant resistance was excellent. This resistance was not on chromosome 7D. The VPM lines also had seedling and adult plant resistance to stem rust. Resistant backcross lines with either Lr29 or LrVPM had higher kernel protein levels than did susceptible sister lines under both rust and rust-free conditions. Although this higher protein content was associated with weaker dough mixing properties, the remix loaf volume remained constant. Leaf rust infection had a detrimental effect on grain yield and kernel weight and on wheat quality as shown by decreased kernel protein content and farinograph absorption. Dough mixing strength was higher for the rust infected lines than the rust resistant lines.Key words: Triticum aestivum, wheat (spring), leaf rust resistance, protein content, breadmaking quality

scholarly journals Barley Stripe Rust Resistance QTL: Development and Validation of SNP Markers for Resistance to Puccinia striiformis f. sp. hordei

2016 ◽  
Vol 106 (11) ◽  
pp. 1344-1351 ◽  
Author(s):  
K. Esvelt Klos ◽  
T. Gordon ◽  
P. Bregitzer ◽  
P. Hayes ◽  
X. M. Chen ◽  
...  
Keyword(s):  
Stripe Rust ◽  
Rust Resistance ◽  
Puccinia Striiformis ◽  
Recombinant Inbred Lines ◽  
Snp Markers ◽  
Stripe Rust Resistance ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Resistance Qtl ◽  
Barley Stripe Rust

Quantitative trait loci (QTL) for barley stripe rust resistance were mapped in recombinant inbred lines (RIL) from a ‘Lenetah’ × ‘Grannelose Zweizeilige’ (GZ) cross. GZ is known for a major seedling resistance QTL on chromosome 4H but linked markers suitable for marker-assisted selection have not been developed. This study identified the 4H QTL (log of the likelihood [LOD] = 15.94 at 97.19 centimorgans [cM]), and additional QTL on chromosomes 4H and 6H (LOD = 5.39 at 72.7 cM and 4.24 at 34.46 cM, respectively). A QTL on chromosome 7H (LOD = 2.04 at 81.07 cM) was suggested. All resistance alleles were derived from GZ. Evaluations of adult plant response in Corvallis, OR in 2013 and 2015 provided evidence of QTL at the same positions. However, the minor QTL on 4H was not statistically significant in either location/year, while the 7H QTL was significant in both. The single-nucleotide polymorphism markers flanking the resistance QTL were validated in RIL from a ‘95SR316A’ × GZ cross for their ability to predict seedling resistance. In 95SR316A × GZ, 91 to 92% of RIL with GZ alleles at the major 4H QTL and at least one other were resistant to moderate in reaction. In these populations, at least two QTL were required to transfer the barley stripe rust resistance from GZ.

scholarly journals Durability of resistance to stripe rust in the wheat cultivar Claire in New Zealand

2011 ◽  
Vol 64 ◽  
pp. 17-24
Author(s):  
S.F. Chng ◽  
M.G. Cromey ◽  
S.C. Shorter
Keyword(s):  
New Zealand ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Field Experiments ◽  
Adult Plant Resistance ◽  
Puccinia Striiformis ◽  
Durable Resistance ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Differential Cultivars

Host resistance is the most economical way to manage wheat stripe rust caused by Puccinia striiformis f sp tritici The cultivar Claire was released in 1999 and until recently remained highly resistant to the disease in the United Kingdom While Claire was considered durably resistant to stripe rust in New Zealand it is now categorised as moderately susceptible The present study investigated whether racespecific resistance was responsible for this breakdown in resistance and whether cv Claire retains useful durable resistance A rust culture from cv Claire was compared with a pre2005 culture on a set of differential cultivars The seedling resistance in cv Claire was racespecific Greenhouse and field experiments suggest that the adult plant resistance in cv Claire has been reduced in the presence of a more virulent stripe rust population Remaining adult plant resistance is insufficient to provide adequate control of stripe rust in New Zealand wheat crops

An introgression on wheat chromosome 4DL in RL6077 (Thatcher*6/PI 250413) confers adult plant resistance to stripe rust and leaf rust (Lr67)

2010 ◽  
Vol 121 (6) ◽  
pp. 1083-1091 ◽  
Author(s):  
Colin W. Hiebert ◽  
Julian B. Thomas ◽  
Brent D. McCallum ◽  
D. Gavin Humphreys ◽  
Ronald M. DePauw ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Wheat Chromosome ◽  
Adult Plant

CHROMOSOME LOCATION OF THREE GENES FOR LEAF RUST RESISTANCE IN COMMON WHEAT

1971 ◽  
Vol 13 (3) ◽  
pp. 480-483 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Plant Resistance ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Monosomic Analysis ◽  
Chromosome Location ◽  
Seedling Resistance

Genes Lr10 and Lr16 for seedling resistance and gene Lr12 for adult-plant resistance to leaf rust in common wheat were located on specific chromosomes by monosomic analysis using the Rescue monosomic series. Gene Lr10 is on chromosome 1A and genes Lr12 and Lr16 are on chromosome 4A. The latter two genes must be more than 50 crossover units apart since they segregated independently. These three genes were backcrossed into Thatcher from the variety Exchange. The variety Chinese Spring probably carries gene Lr12.

Genetics of adult-plant resistance of leaf rust in 'Frontana' and three CIMMYT wheats

Genome ◽  
1992 ◽  
Vol 35 (1) ◽  
pp. 24-31 ◽  
Author(s):  
R. P. Singh ◽  
S. Rajaram
Keyword(s):  
Triticum Aestivum ◽  
Leaf Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Leaf Rust Resistance ◽  
Field Resistance ◽  
Puccinia Recondita ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Additive Genes

Wheat (Triticum aestivum L.) cultivar 'Frontana' and three globally leaf rust resistant CIMMYT spring bread wheats, 'Parula', 'Trap', and 'Mango', which displayed seedling susceptibility to Mexican pathotypes TCB/TD and (or) TBD/TM of Puccinia recondita f.sp. tritici and which displayed high levels of adult-plant resistance, were genetically analyzed. The four wheats were intercrossed and crossed with seedling and adult-plant susceptible cultivars 'Inia 66' or 'Yecora 70', and also with 'RL6058', a tester for leaf rust resistance gene Lr34. Adult-plant resistance to leaf rust appeared to be based on four additive genes in 'Frontana' and three additive genes in each of the other resistant wheats. Gene Lr34 was confirmed to be present in all four wheats and appeared to be important in conferring adult-plant resistance in conjunction with other partially effective adult-plant resistance genes. Some of these latter genes appeared to be common in the four wheats, since limited segregation occurred when intercrossed. Genes Lr3, Lr10, Lr13, and Lr26 appeared to be independent of the adult-plant resistance. The resistance is expected to be durable, since the source of Lr34 and the additional genes was traced to 'Frontana', which has retained its field resistance since its release in 1943.Key words: adult-plant resistance, genetics, Puccinia recondita f.sp. tritici, Triticum aestivum.

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