Developing Lowland Rice Germplasm with Resistance to Multiple Biotic Stresses through Anther Culture in Uganda
Loading...
Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
The Korean Society of International Agriculture
Abstract
The lowland rice genotypes grown in Uganda were introduced in the 1970s. These genotypes
(now landraces) are threatened by multiple biotic stresses namely; Rice Yellow Mottle Virus
(RYMV) disease, Bacterial Leaf Streak(BLS). Bacterial Leaf Blight (BLB), and Rice Blast (BL). There
are currently no rice lines with multiple resistance to these stresses although attempts have been made to
develop them through hybridization involving cultivated, local and introduced lines and four varieties
with tolerance to RYMV have been released. The use of potential resistance donor such as the traditional
African cultivated rice, Oryza glaberrima, could be an alternative approach to furnish multiple resistance
to the cultivated rice. The rice germplasm developed from a cross of an Oryza glaberrima from Niger
Delta and Milyang23, a high-yielding Korean rice variety were evaluated for multiple resistance in
Uganda as a Korea-Africa Food & Agriculture Cooperation Initiative (KAFACI)-Alliance for a Green
Revolution in Africa (AGRA) joint cooperative project, “Enhancement of High Yielding Rice Germplasm
in African Countries through Anther Culture Breeding”. Milyang23 was back crossed 4 times
with Oryza. glaberrima and fixed through anther culture in Korea. An evaluation of 50 lines generated
showed that up to 98%, 92%, 88% and 88% of the test plants showed resistance to the RYMV, BLS,
BLB and BL diseases, respectively. There was no symptoms of the four diseases in 74% of the genotypes
tested. The plants that showed symptoms of the three diseases had scores of not more than 3 on a 1 to 9
scale. This preliminary finding demonstrates that these generations of rice lines could help solving the
current problem of susceptibility to multiple diseases.
Description
Keywords
Germplasm, Anther culture, Hybridization, Rice yellow mottle virus, Bacterial leaf sreak, Bacterial leaf blight, Rice blast
Citation
Jimmy, L., Cho, G. R., Ininda, J., Ayirebi, D. P. K., James, E., Moses, E., ... & Kang, K. H. (2015). Developing lowland rice germplasm with resistance to multiple biotic stresses through anther culture in Uganda. The Korean Society of International Agriculture, 27(4), 415-420. http://dx.doi.org/10.12719/KSIA.2015.27.4.415