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http://dx.doi.org/10.5352/JLS.2020.30.9.798

Investigation into Whether Agronomic Traits Are Fixed for the Breeding of Drought Tolerance and BPH-resistant Crosses  

Lee, So Young (School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University)
Kim, Eun-Gyeong (School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University)
Park, Jae-Ryoung (School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University)
Kim, Kyung-Min (School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University)
Publication Information
Journal of Life Science / v.30, no.9, 2020 , pp. 798-803 More about this Journal
Abstract
Late in the 1960s, South Korea established cultivation technology and began breeding new "Tongil" type rice cultivars by crossing indica and japonica. To date, this cultivation technique has been used to produce a wide variety of cultivars to meet consumer preferences and adapt to extreme weather conditions. Once major genetic traits are no longer segregated through advanced generations, varieties obtained from a cross between different crops may become a new variety. In this study, we confirmed the agronomic traits of F4, F5, and F6 by advanced generation a population in which drought tolerance and brown planthopper (BPH) resistance were crossed. HV23, Ilmi/HV23, and Drimi2ho/HV23 were used. HV23 was drought-tolerant, and Drimi2ho was resistant to BPH. As a result, it was possible to consider that the agronomic traits were fixed because none of them showed a significant difference from the others. While it takes more than 10 years for the pedigree method of breeding, this study confirmed that the agronomic traits were fixed in 4-6 years. In the future, we will investigate the homology of the CaMsrB2 gene and the Bph1 gene, to confirm that both genes are closely related to each other, and analyze the stable inheritance of the introduced gene for multiple successive generations.
Keywords
Agronomic traits; Bph1; CaMsrB2; generation; rice;
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