Multiple major QTL lead to stable yield performance of rice cultivars across varying drought intensities.

ABSTRACT:

Background

Availability of irrigation water is becoming a major limiting factor in rice cultivation. Production in rainfed areas is affected in particular by drought events, as these areas are commonly planted to high-yielding drought-susceptible rice (Oryza sativa L.) varieties. The use of bulk segregant analysis (BSA), taking grain yield (GY) as a selection criterion, has resulted in the identification of several large-effect QTL. A QTL mapping study was undertaken on a BC1F3:4 population developed from the cross IR55419-04/2*TDK1 with the aim of identifying large-effect QTL in the background of TDK1, a popular variety from Lao PDR.

Results

The study identified three QTL-qDTY3.1 (RM168-RM468), qDTY6.1 (RM586-RM217), and qDTY6.2 (RM121-RM541)-for grain yield under drought.

SUBMITTER: Dixit S 

PROVIDER: S-EPMC3933981 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature