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Marker-assisted forward breeding to develop a drought-, bacterial-leaf-blight-, and blast-resistant rice cultivar

IRRI - International Rice Research Institute | Indian Institute of Rice Research
IRRI - International Rice Research Institute (Los Baños, Philippines)Indian Institute of Rice Research (Hyderabad, Telangana, India)
The Plant Genome
2021
DOI available
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Marker-assisted forward breeding to develop a drought-, bacterial-leaf-blight-, and blast-resistant rice cultivar
Image credit: The Plant Genome (2022) - CC BY 4.0 | CC BY 4.0
Partner institutions
IRRI - International Rice Research Institute logo
IRRI - International Rice Research Institute

Los Baños, Philippines

The International Rice Research Institute, an independent nonprofit research organization based in the Philippines dedicated to reducing poverty and hunger through rice science.

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Indian Institute of Rice Research logo
Indian Institute of Rice Research

Hyderabad, Telangana, India

India's national institute for rice research, based in Hyderabad, focused on rice genetics, breeding, and crop protection.

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How Vibe analyzers were used

Grain dimensions (length and breadth) of drought-, bacterial-leaf-blight-, and blast-resistant rice introgression lines were measured with a Vibe QM3 image analyzer to confirm grain quality was preserved alongside the introgressed resistance and drought-tolerance traits.

Study overview

Drought, bacterial leaf blight (BLB), and blast are key stresses that significantly affect rice grain yield. This study used marker-assisted forward breeding with a simultaneous crossing approach to combine three drought-tolerance QTL (qDTY1.1, qDTY3.1, qDTY12.1), four BLB resistance genes (Xa4, xa5, xa13, Xa21), and one blast-resistance gene (Pi9) into the elite rice cultivar Lalat. Grain dimensions (kernel length and breadth) of selected introgression lines were measured using a Vibe QM3 image analyzer to confirm that grain quality traits were preserved. Under reproductive-stage drought stress, introgression lines with major-effect QTL showed yield advantages over the elite parent Lalat, while also carrying improved resistance to BLB and blast.

Topics and keywords
rice
marker-assisted breeding
drought tolerance
bacterial leaf blight
blast resistance
Vibe QM3
Related crop analysis
Rice imaging & analysis
Bibliographic details

Year: 2021

Publication: The Plant Genome

DOI: 10.1002/tpg2.20170

Institutions: IRRI - International Rice Research Institute, Indian Institute of Rice Research

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