Identification of drought tolerant rice (Oryza Sativa L.) genotypes with Asian and African Backgrounds
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Date
2023
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Drought is among the major abiotic stresses on rice production that can cause yield losses of
up to 100% under severe drought conditions. Neither of the rice varieties currently grown in Burundi
can withstand very low and irregular precipitation. This study identified genotypes that have putative
quantitative trait loci (QTLs) associated with drought tolerance and determined their performance
in the field. Two hundred and fifteen genotypes were grown in the field under both drought and
irrigated conditions. Genomic deoxyribonucleic acid (DNA) was extracted from rice leaves for
further genotypic screening. The results revealed the presence of the QTLs qDTY12.1, qDTY3.1,
qDTY2-2_1, and qDTY1.1 in 90%, 85%, 53%, and 22% of the evaluated genotypes, respectively. The
results of the phenotypic evaluation showed a significant yield reduction due to drought stress.
Yield components and other agronomic traits were also negatively affected by drought. Genotypes
having high yield best linear unbiased predictions (BLUPs) with two or more major QTLs for drought
tolerance, including IR 108044-B-B-B-3-B-B, IR 92522-45-3-1-4, and BRRI DHAN 55 are of great
interest for breeding programs to improve the drought tolerance of lines or varieties with other
preferred traits.
Description
Journal Article
Keywords
Soil moisture content, Quantitative trait loci, Irrigated; yield, Improvement, Burundi
Citation
: Ndikuryayo, C.; Ndayiragije, A.; Kilasi, N.L.; Kusolwa, P. Identification of Drought Tolerant Rice (Oryza Sativa L.) Genotypes with Asian and African Backgrounds