Genetic control of resistance to rice yellow mottle virus disease in two rice crosses

• Published in: Journal of crop improvement Vol. 36; no. 1; pp. 40 - 56
• Main Authors: Tawiah, Isaac, Darko Asante, Maxwell, Oppong, Allen, Asare, Kwabena, Amadu, Braima, Gyameyah, Daniel, Lamptey, Maxwell, Kang, Kyung-Ho
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 02.01.2022; Taylor & Francis Ltd
• Subjects: Disease resistance; Epistasis; Generation mean analysis; Genes; Genetic control; Genotypes; Heritability; Mendelian inheritance; Oryza sativa; Plant breeding; Plant viruses; Polygenic inheritance; Quantitative analysis; Rice; rice yellow mottle virus disease; Sobemovirus; Viruses
• ISSN: 1542-7528; 1542-7536
• DOI: 10.1080/15427528.2021.1905757

Rice yellow mottle virus (RYMV) disease is the leading biotic stress affecting rice (Oryza sativa L.) production in Africa, causing yield losses ranging from 10% to 100%. In Ghana, most of the leading aromatic rice varieties are susceptible to RYMV disease. In this study, two resistant genotypes (Gigante and K150710) were crossed to a leading aromatic variety (CRI-AgraRice), which is susceptible to RYMV, to determine the mode of inheritance of RYMV disease using both Mendelian and quantitative methods. While the Mendelian segregation pattern suggested a single recessive gene is responsible for resistance to RYMVD in Gigante, the quantitative methods indicated that up to two genes could be responsible for RYMVD resistance in the CRI-AgraRice × Gigante cross. Resistance to RYMVD in the AgraRice × Gigante cross was explained by duplicate epistasis. The inheritance of resistance to RYMVD in CRI-AgraRice × K150710 was polygenic, with up to five genes being responsible and with the gene action fitting into an additive-dominance model. Heritability and genetic advance for the two crosses were high, indicating that breeding for resistance to rice yellow mottle virus disease is feasible.