scholarly journals Identification, Characterization, and Evaluation of Novel Stripe Rust-Resistant Wheat–Thinopyrum intermedium Chromosome Translocation Lines

Plant Disease ◽  
2020 ◽  
Vol 104 (3) ◽  
pp. 875-881
Author(s):  
Xingwei Zheng ◽  
Caiguo Tang ◽  
Ran Han ◽  
Jiajia Zhao ◽  
Ling Qiao ◽  
...  
Keyword(s):  
Stripe Rust ◽  
Chromosome Translocation ◽  
Stripe Rust Resistance ◽  
Scar Markers ◽  
Thinopyrum Intermedium ◽  
Wheat Improvement ◽  
Improvement Programs ◽  
Translocation Lines ◽  
Chromosome Translocation Lines ◽  
Intermedium Chromosome

Stripe rust is an important disease in wheat, and development of genetic resistance in cultivars is an effective approach to control the disease. Wild species of wheat, such as Thinopyrum intermedium, are an excellent gene source for wheat improvement. In this study, two stripe rust-resistant wheat–Th. intermedium chromosome translocation lines, CH4131 and CH4132, were characterized by cytogenetic and pathological methods. The introgressed chromosome fragment was tagged using amplified fragment-length polymorphism-derived sequence-characterized amplified region (SCAR) markers and intron targeting markers, indicating that CH4131 and CH4132 both possess a homologous group 3 chromatin of Th. intermedium. Genomic in situ hybridization results suggested that a very small Th. intermedium chromosome segment was translocated to the terminal region of wheat 1BS for both lines, forming a configuration of T3Ai-1BS.1BL. The two translocation lines were resistant to stripe rust, and the resistance gene, temporarily designated YrCH-1BS, was likely derived from Th. intermedium. The translocated chromosome fragments have no genetic linkage drag to agronomic performance. The grain quality indexes of these two translocations were higher than local wheat varieties. Therefore, CH4131 and CH4132 could be used as potential gene sources in wheat improvement programs. The SCAR markers are useful to select stripe rust resistance from Th. intermedium.

Development and characterization of novel wheat-rye 1RS•1BL translocation lines with high resistance to Puccinia striiformis f. sp. tritici

2022 ◽  
Author(s):  
Tianheng Ren ◽  
Qing Jiang ◽  
Zixin Sun ◽  
Zhenglong Ren ◽  
Feiquan Tan ◽  
...  
Keyword(s):  
Stripe Rust ◽  
High Resistance ◽  
Puccinia Striiformis ◽  
Stripe Rust Resistance ◽  
Sources Of Resistance ◽  
Chinese Landrace ◽  
New Gene ◽  
Improvement Programs ◽  
Translocation Lines

Wheat-rye 1RS•1BL translocations from Petkus rye have contributed substantially to wheat production worldwide with their great disease resistance and yield traits. However, the resistance genes on the 1RS chromosomes have completely lost their resistance to newly emerged pathogens. Rye could widen the variation of 1RS as a naturally cross-pollinated related species of wheat. In this study, we developed three new 1RS•1BL translocation lines by crossing rye inbred line BL1, selected from Chinese landrace rye Baili, with wheat cultivar Mianyang11. These three new translocation lines exhibited high resistance to the most virulent and frequently occurring stripe rust pathotypes and showed high resistance in the field where stripe rust outbreaks have been most severe in China. One new gene for stripe rust resistance, located on 1RS of the new translocation lines, is tentatively named YrRt1054. YrRt1054 confers resistance to Puccinia striiformis f. sp. tritici pathotypes that are virulent toward Yr9 and YrCn17. This new resistance gene, YrRt1054, is available for wheat improvement programs. The present study indicated that rye cultivars may carry additional untapped variation as potential sources of resistance.

Distribution of Puccinia striiformis f. sp. tritici races and virulence in wheat growing regions of Kenya from 1970 TO 2014

Plant Disease ◽  
2021 ◽  
Author(s):  
Mercy Wamalwa ◽  
Ruth Wanyera ◽  
Julian Rodriguez-Algaba ◽  
Lesley Boyd ◽  
James Owuoche ◽  
...  
Keyword(s):  
Stripe Rust ◽  
Fungal Pathogen ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Stripe Rust Resistance ◽  
Scar Markers ◽  
Seedling Resistance ◽  
Sequence Characterized Amplified Region ◽  
Triticum Spp ◽  
Virulence Diversity

Stripe rust, caused by the fungal pathogen Puccinia striiformis f. sp. tritici (Pst), is a major threat to wheat (Triticum spp.) production worldwide. The objective of this study was to determine the virulence of Pst races prevalent in the main wheat growing regions of Kenya, which includes Mt. Kenya, Eastern Kenya, and the Rift Valley (Central, Southern, and Northern Rift). Fifty Pst isolates collected from 1970 to 1992 and from 2009 to 2014 were virulence phenotyped using stripe rust differential sets, and 45 isolates were genotyped with sequence characterized amplified region (SCAR) markers to differentiate among the isolates and identify aggressive strains PstS1 and PstS2. Virulence corresponding to stripe rust resistance genes Yr1, Yr2, Yr3, Yr6, Yr7, Yr8, Yr9, Yr17, Yr25, Yr27 and the seedling resistance in genotype Avocet S were detected. Ten races were detected in the Pst samples obtained from 1970 to 1992, and three additional races were detected from 2009 to 2014, with a single race being detected in both periods. The SCAR markers detected both Pst1 and Pst2 strains in the collection. Increasing Pst virulence was found in the Kenyan Pst population, and that diverse Pst race groups dominated different wheat growing regions. Moreover, recent Pst races in east Africa indicated possible migration of some race groups into Kenya from other regions. This study is important in understanding Pst evolution and virulence diversity and useful in breeding wheat cultivars with effective resistance to stripe rust. Keywords: pathogenicity, Puccinia f. sp. tritici stripe (yellow) rust, Triticum aestivum

scholarly journals Retraction Note: Analysis of DNA methylation polymorphism in a set of stable chromosome translocation lines

2013 ◽  
Vol 32 (4) ◽  
pp. 987-987
Author(s):  
Shuangrong Li ◽  
Yong Zhang ◽  
Kejun Deng ◽  
Jinhua Peng ◽  
Xuelian Zeng ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Chromosome Translocation ◽  
Translocation Lines ◽  
Chromosome Translocation Lines

Development and identification of wheat-barley 2H chromosome translocation lines carrying the Isa gene

2011 ◽  
Vol 131 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Hongda Zou ◽  
Ying Wu ◽  
Hongkui Liu ◽  
Zhishan Lin ◽  
Xingguo Ye ◽  
...  
Keyword(s):  
Chromosome Translocation ◽  
Translocation Lines ◽  
Chromosome Translocation Lines

scholarly journals Pyramiding of High Grain Weight With Stripe Rust and Leaf Rust Resistance in Elite Indian Wheat Cultivar Using a Combination of Marker Assisted and Phenotypic Selection

2020 ◽  
Vol 11 ◽  
Author(s):  
Satinder Kaur ◽  
Jaspreet Kaur ◽  
G. S. Mavi ◽  
Guriqbal Singh Dhillon ◽  
Achla Sharma ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Phenotypic Selection ◽  
Leaf Rust Resistance ◽  
Grain Weight ◽  
Stripe Rust Resistance ◽  
Wheat Cultivars ◽  
Stripe Rust Resistance Gene ◽  
Improvement Programs

Wheat (Triticum aestivum L.) is an important cereal crop globally as well as in India and yield improvement programs encounter a strong impediment from ever-evolving rust pathogens. Hence, durable rust resistance is always a priority trait for wheat breeders globally. Grain weight, represented as thousand grain weight (TGW), is the most important yield-contributing trait in wheat. In the present study high TGW has been transferred into two elite Indian wheat cultivars PBW343 and PBW550 from a high TGW genotype, Rye selection 111, selected from local germplasm. In the background of PBW343 and PBW550, an increase in TGW upto 27.34 and 18% was observed, respectively (with respect to recipient parents), through conventional backcross breeding with phenotypic selections in 3 years replicated RBD trials. Resistance to leaf rust and stripe rust has been incorporated in the high TGW version of PBW550 through marker assisted pyramiding of stripe rust resistance gene Yr15 using marker Xuhw302, and a pair of linked leaf rust and stripe rust resistance genes Lr57-Yr40 using marker Ta5DS-2754099_kasp23. Improved versions of PBW550 with increased TGW ranging from 45.0 to 46.2 g (up to a 9% increase) and stacked genes for stripe and leaf rust resistance have been developed. This study serves as proof of utilizing conventional breeding and phenotypic selection combined with modern marker assisted selection in improvement of important wheat cultivars as a symbiont of conventional and moderan techniques.

scholarly journals Stripe rust resistance and dough quality of new wheat - Dasypyrum villosum translocation lines

2015 ◽  
Vol 14 (3) ◽  
pp. 8077-8083 ◽  
Author(s):  
W.C. Zhao ◽  
X. Gao ◽  
J. Dong ◽  
Z.J. Zhao ◽  
Q.G. Chen ◽  
...  
Keyword(s):  
Stripe Rust ◽  
Rust Resistance ◽  
Stripe Rust Resistance ◽  
Dasypyrum Villosum ◽  
Dough Quality ◽  
Translocation Lines
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