Drought tolerance in rice: QTLs, marker-assisted selection, and environmental interactions

A. Price*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


A mapping population of 205 recombinant inbred lines based on a cross between two drought-tolerant upland rice varieties, Bala and Azucena, was used to identify quantitative trait loci (QTLs) for drought-related traits (root morphology) and field performance under drought. A root growth study included two types of soil-filled containers and hydroponics in addition to root penetration assessment using the wax layer method. Drought screening was conducted over two seasons in the field at both IRRI and WARDA. By using multiple environments and by comparing with other experiments conducted on other populations, some potentially valuable QTLs have been identified. Four of these regions are now being used to improve the Indian upland variety Kalinga III. A total of nine QTLs are being developed into near-isogenic lines to further investigate the nature of the QTLs.

Original languageEnglish
Title of host publicationAdvances In Rice Genetics
Subtitle of host publicationPart 2
PublisherWorld Scientific Publishing Co., Inc.
Number of pages3
ISBN (Electronic)9789812814319
Publication statusPublished - 1 Jan 2008


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