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Start Over Author "Tianheng Ren" Journal phytopathology
3 results on '"Tianheng Ren"'

1. Development and Characterization of Novel Wheat-Rye 1RS·1BL Translocation Lines with High Resistance to

Author

Tianheng, Ren, Qing, Jiang, Zixin, Sun, Zhenglong, Ren, Feiquan, Tan, Wenyi, Yang, and Zhi, Li

Subjects
Basidiomycota, Secale, Puccinia, Chromosomes, Plant, In Situ Hybridization, Fluorescence, Translocation, Genetic, Triticum, Disease Resistance, Plant Diseases
Abstract

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

Published
2022

2. Molecular and Cytogenetic Characterization of a Wheat-Rye 7BS.7RL Translocation Line with Resistance to Stripe Rust, Powdery Mildew, and Fusarium Head Blight.

Author

Tianheng Ren, Zixin Sun, Zhenglong Ren, Feiquan Tan, Peigao Luo, Zongxiang Tang, Shulan Fu, and Zhi Li

Subjects
*STRIPE rust, *POWDERY mildew diseases, *FUSARIUM, *WHEAT breeding, *FLUORESCENCE in situ hybridization, *RYE, *STEEL corrosion
Abstract

Secale cereale is used as a source of genes for disease resistance in wheat cultivation. In this study, a homozygous translocation line (RTI4-245) that originated from a cross between a commercial wheat cultivar (Mianyang 11) and a local Chinese variety of rye (Baili) was developed. Multicolor fluorescence in situ hybridization and PCR analysis demonstrated that the translocation chromosome was 7BS.7RL. Resistance analysis showed that RT14-245 was resistant to prevalent pathotypes of stripe rust and powdery mildew. RT 14-245 also exhibited high resistance to Fusarium head blight, which was similar to the resistance exhibited by the wheat cultivar Sumai 3. The results indicated that RT14-245 simultaneously exhibited high levels of resistance against stripe rust, powdery mildew, and Fusarium head blight. These results indicate that chromosome arm 7RL in the translocation line RT14-245 is an excellent new resource for wheat breeding programs. [ABSTRACT FROM AUTHOR]

Published
2020
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3. Molecular Cytogenetic Characterization of Novel Wheat-Rye T1RS.1AL Translocation Lines with Resistance to Powdery Mildew and Stripe Rust Derived from the Chinese Rye Landrace Qinling.

Author

Zhi Li, Zixin Sun, Liqi Zhao, Tong Yan, Zhenglong Ren, and Tianheng Ren

Subjects
*STRIPE rust, *FLUORESCENCE in situ hybridization, *DOMINANCE (Genetics), *POWDERY mildew diseases, *CHROMOSOMES, *WHEAT, *RUST diseases
Abstract

Stripe rust and powdery mildew are serious diseases that severely decrease the yield of wheat. Planting wheat cultivars with powdery mildew and stripe rust resistance genes is the most effective way to control these two diseases. Introducing disease resistance genes from related species into the wheat genome via chromosome translocation is an important way to improve wheat disease resistance. In this study, nine novel T1RS.1AL translocation lines were developed from the cross of wheat cultivar Chuannong25 (CN25) and a Chinese rye Qinling. The results of non-denaturing fluorescence in situ hybridization and PCR showed that all new lines were homozygous for the T1RS.1AL translocation. These new T1RS.1AL translocation lines exhibited strong resistance to stripe rust and powdery mildew. The cytogenetics results indicated that the resistance of the new lines was conferred by the 1RS chromosome arms, which came from Qinling rye. The genetic analysis indicated that there were new dominant resistance genes on the 1RS chromosome arm resistant to stripe rust and powdery mildew, and their resistance patterns were different from those of Yr9, Pm8, and Pm17 genes. In addition, the T1RS.1AL translocation lines generally exhibited better agronomic traits in the field relative to CN25. These T1RS.1AL translocations have great potential in wheat-breeding programs in the future. [ABSTRACT FROM AUTHOR]

Published
2024
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