Development of a Temperate Climate-Adapted indica Multi-stress Tolerant Rice Variety by Pyramiding Quantitative Trait Loci.

Autor: Shin NH; Department of Integrative Biological Sciences and Industry, College of Life Sciences, Sejong University, Seoul, 05006, Korea., Han JH; Department of Integrative Biological Sciences and Industry, College of Life Sciences, Sejong University, Seoul, 05006, Korea., Vo KTX; Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, Gyeonggi-do, 17104, Korea., Seo J; Department of Plant Bioscience, College of Natural Resources and Life Science, Pusan National University, Miryang, 50463, Korea.; Life and Industry Convergence Research Institute, Pusan National University, Miryang, 50463, Korea., Navea IP; Department of Integrative Biological Sciences and Industry, College of Life Sciences, Sejong University, Seoul, 05006, Korea.; Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Los Banos, Philippines., Yoo SC; Department of Plant Life and Environmental Science, Hankyong National University, Anseong, Gyeonggi-do, 17579, Korea., Jeon JS; Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, Gyeonggi-do, 17104, Korea. jjeon@khu.ac.kr., Chin JH; Department of Integrative Biological Sciences and Industry, College of Life Sciences, Sejong University, Seoul, 05006, Korea. jhchin@sejong.ac.kr.
Jazyk: angličtina
Zdroj: Rice (New York, N.Y.) [Rice (N Y)] 2022 Apr 09; Vol. 15 (1), pp. 22. Date of Electronic Publication: 2022 Apr 09.
DOI: 10.1186/s12284-022-00568-2
Abstrakt: Successful cultivation of rice (Oryza sativa L.) in many Asian countries requires submergence stress tolerance at the germination and early establishment stages. Two quantitative trait loci, Sub1 (conferring submergence tolerance) and AG1 (conferring anaerobic germination), were recently pyramided into a single genetic background, without compromising any desirable agronomic traits, leading to the development of Ciherang-Sub1 + AG1 (CSA). However, little research has been conducted to enhance plant tolerance to abiotic stress (submergence) and biotic stress (rice blast), which occur in a damp climate following flooding. The BC 2 F 5 breeding line was phenotypically characterized using the AvrPi9 isolate. The biotic and abiotic stress tolerance of selected lines was tested under submergence stress and anaerobic germination conditions, and lines tolerant to each stress condition were identified through phenotypic and gene expression analyses. The Ciherang-Sub1 + AG1 + Pi9 (CSA-Pi9) line showed similar agronomic performance to its recurrent parent, CSA, but had significantly reduced chalkiness in field trials conducted in temperate regions. Unexpectedly, the CSA-Pi9 line also showed salinity tolerance. Thus, the breeding line newly developed in this study, CSA-Pi9, functioned under stress conditions, in which Sub1, AG1, and Pi9 play a role and had superior grain quality traits compared to its recurrent parent in temperate regions. We speculate that CSA-Pi9 will enable the establishment of climate-resilient rice cropping systems, particularly in East Asia.
(© 2022. The Author(s).)
Databáze: MEDLINE
Externí odkaz: