Molecular Marker Based Design for Breeding Wheat Lines with Multiple Resistance and Superior Quality.

Autor: Liu T; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; University of Chinese Academy of Sciences, Beijing 100049, China., Fedak G; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada., Zhang L; Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, Qinghai 810008, China., Zhou R; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; University of Chinese Academy of Sciences, Beijing 100049, China., Chi D; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada., Fetch T; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada., Hiebert C; Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON, K1A 0C6, Canada., Chen W; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, Qinghai 810008, China., Liu B; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, Qinghai 810008, China., Liu D; Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan 611130, China., Zhang H; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, Qinghai 810008, China., Zhang B; Key Laboratory of Adaptation and Evolution of Plateau Biota (AEPB), Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.; Qinghai Province Key Laboratory of Crop Molecular Breeding, Xining, Qinghai 810008, China.
Jazyk: angličtina
Zdroj: Plant disease [Plant Dis] 2020 Oct; Vol. 104 (10), pp. 2658-2664. Date of Electronic Publication: 2020 Aug 04.
DOI: 10.1094/PDIS-02-20-0420-RE
Abstrakt: There has not been a major wheat stem rust epidemic worldwide since the 1970s, but the emergence of race TTKSK of Puccinia graminis f. sp. tritici in 1998 presented a great threat to the world wheat production. Single disease-resistance genes are usually effective for only several years before the pathogen changes genetically to overcome the resistance. Stripe rust caused by Puccinia striiformis f. sp. tritici ( Pst ) is one of the most common and persistent wheat diseases worldwide. The development of varieties with multiple resistance is the most economical and effective strategy for preventing stripe rust and stem rust, the two main rust diseases constraining wheat production. Plateau 448 has been widely used in the spring wheat growing region in northwest China, but it has become susceptible to stripe rust and is susceptible to TTKSK. To produce more durable resistance to race TTKSK as well as to stripe rust, four stem rust resistance genes ( Sr33 , Sr36 , Sr-Cad , and Sr43 ) and three stripe rust resistance genes ( Yr5 , Yr18 , and Yr26 ) were simultaneously introgressed into Plateau 448 to improve its stem rust (Ug99) and stripe rust resistance using a marker-assisted backcrossing strategy combined with phenotypic selection. We obtained 131 BC 1 F 5 lines that pyramided two to four Ug99 resistance genes and one to two Pst resistance genes simultaneously. Thirteen of these lines were selected for their TTKSK resistance, and all of them exhibited near immunity or high resistance to TTKSK. Among the 131 pyramided lines, 95 showed high resistance to mixed Pst races. Nine lines exhibited not only high resistance to TTKSK and Pst but also better agronomic traits and high-molecular-weight glutenin subunit compositions than Plateau 448.
Databáze: MEDLINE
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