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Molecular Breeding Strategy and Challenges Towards Improvement of Blast Disease Resistance in Rice Crop.

Ashkani S, Rafii MY, Shabanimofrad M, Miah G, Sahebi M, Azizi P, Tanweer FA, Akhtar MS, Nasehi A - Front Plant Sci (2015)

Bottom Line: There is a need to develop strategies providing long-lasting disease resistance against a broad spectrum of pathogens, giving protection for a long time over a broad geographic area, promising for sustainable rice production in the future.So far, molecular breeding approaches involving DNA markers, such as QTL mapping, marker-aided selection, gene pyramiding, allele mining and genetic transformation have been used to develop new resistant rice cultivars.The paper briefly reviewed the progress of studies on this aspect to provide the interest information for rice disease resistance breeding.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Food Crops, Institute of Tropical Agriculture, Universiti Putra Malaysia Serdang, Malaysia ; Department of Agronomy and Plant Breeding, Yadegar -e- Imam Khomeini RAH Shahre-Rey Branch, Islamic Azad University Tehran, Iran.

ABSTRACT
Rice is a staple and most important security food crop consumed by almost half of the world's population. More rice production is needed due to the rapid population growth in the world. Rice blast caused by the fungus, Magnaporthe oryzae is one of the most destructive diseases of this crop in different part of the world. Breakdown of blast resistance is the major cause of yield instability in several rice growing areas. There is a need to develop strategies providing long-lasting disease resistance against a broad spectrum of pathogens, giving protection for a long time over a broad geographic area, promising for sustainable rice production in the future. So far, molecular breeding approaches involving DNA markers, such as QTL mapping, marker-aided selection, gene pyramiding, allele mining and genetic transformation have been used to develop new resistant rice cultivars. Such techniques now are used as a low-cost, high-throughput alternative to conventional methods allowing rapid introgression of disease resistance genes into susceptible varieties as well as the incorporation of multiple genes into individual lines for more durable blast resistance. The paper briefly reviewed the progress of studies on this aspect to provide the interest information for rice disease resistance breeding. This review includes examples of how advanced molecular method have been used in breeding programs for improving blast resistance. New information and knowledge gained from previous research on the recent strategy and challenges towards improvement of blast disease such as pyramiding disease resistance gene for creating new rice varieties with high resistance against multiple diseases will undoubtedly provide new insights into the rice disease control.

No MeSH data available.


Related in: MedlinePlus

Leaf blast disease symptoms. Lesions are typically spindle-shaped; wide in the center and pointed toward either end. Large lesions usually develop a diamond shape with a grayish center and brown margin.
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Figure 2: Leaf blast disease symptoms. Lesions are typically spindle-shaped; wide in the center and pointed toward either end. Large lesions usually develop a diamond shape with a grayish center and brown margin.

Mentions: Rice blast is by far the most important disease that attack rice. The fungus M. oryzae = M. grisae (Cooke) Sacc [anamorph: Pyricularia oryzae], is the causal agent of blast disease (Couch and Kohn, 2002). The fungus colonizes leaves (leaf blast), panicles (panicle blast) and other parts of the rice plants, and causes huge crop loss in rice growing areas. Its most infections occur on the leaves and first symptoms of the disease appear as small brown or grayish dots on the leaves. After 2–3 days the dots develop to almost 1.5 cm long and 0.3–0.5 cm wide diamond-shaped lesions with a gray or white center (Figure 2), causing the infected leaves to die. The yield losses due to blast were reported to be between 30 and 50% in large rice producing areas under favorable environmental conditions (Correa-Victoria José and Zeigler, 1993; Skamnioti and Gurr, 2009). Efforts are underway to develop rice varieties with durable blast resistance. Therefore, continuous studies on blast disease are important in order to overcome this disease problem sustaining rice production in the future.


Molecular Breeding Strategy and Challenges Towards Improvement of Blast Disease Resistance in Rice Crop.

Ashkani S, Rafii MY, Shabanimofrad M, Miah G, Sahebi M, Azizi P, Tanweer FA, Akhtar MS, Nasehi A - Front Plant Sci (2015)

Leaf blast disease symptoms. Lesions are typically spindle-shaped; wide in the center and pointed toward either end. Large lesions usually develop a diamond shape with a grayish center and brown margin.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4644793&req=5

Figure 2: Leaf blast disease symptoms. Lesions are typically spindle-shaped; wide in the center and pointed toward either end. Large lesions usually develop a diamond shape with a grayish center and brown margin.
Mentions: Rice blast is by far the most important disease that attack rice. The fungus M. oryzae = M. grisae (Cooke) Sacc [anamorph: Pyricularia oryzae], is the causal agent of blast disease (Couch and Kohn, 2002). The fungus colonizes leaves (leaf blast), panicles (panicle blast) and other parts of the rice plants, and causes huge crop loss in rice growing areas. Its most infections occur on the leaves and first symptoms of the disease appear as small brown or grayish dots on the leaves. After 2–3 days the dots develop to almost 1.5 cm long and 0.3–0.5 cm wide diamond-shaped lesions with a gray or white center (Figure 2), causing the infected leaves to die. The yield losses due to blast were reported to be between 30 and 50% in large rice producing areas under favorable environmental conditions (Correa-Victoria José and Zeigler, 1993; Skamnioti and Gurr, 2009). Efforts are underway to develop rice varieties with durable blast resistance. Therefore, continuous studies on blast disease are important in order to overcome this disease problem sustaining rice production in the future.

Bottom Line: There is a need to develop strategies providing long-lasting disease resistance against a broad spectrum of pathogens, giving protection for a long time over a broad geographic area, promising for sustainable rice production in the future.So far, molecular breeding approaches involving DNA markers, such as QTL mapping, marker-aided selection, gene pyramiding, allele mining and genetic transformation have been used to develop new resistant rice cultivars.The paper briefly reviewed the progress of studies on this aspect to provide the interest information for rice disease resistance breeding.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Food Crops, Institute of Tropical Agriculture, Universiti Putra Malaysia Serdang, Malaysia ; Department of Agronomy and Plant Breeding, Yadegar -e- Imam Khomeini RAH Shahre-Rey Branch, Islamic Azad University Tehran, Iran.

ABSTRACT
Rice is a staple and most important security food crop consumed by almost half of the world's population. More rice production is needed due to the rapid population growth in the world. Rice blast caused by the fungus, Magnaporthe oryzae is one of the most destructive diseases of this crop in different part of the world. Breakdown of blast resistance is the major cause of yield instability in several rice growing areas. There is a need to develop strategies providing long-lasting disease resistance against a broad spectrum of pathogens, giving protection for a long time over a broad geographic area, promising for sustainable rice production in the future. So far, molecular breeding approaches involving DNA markers, such as QTL mapping, marker-aided selection, gene pyramiding, allele mining and genetic transformation have been used to develop new resistant rice cultivars. Such techniques now are used as a low-cost, high-throughput alternative to conventional methods allowing rapid introgression of disease resistance genes into susceptible varieties as well as the incorporation of multiple genes into individual lines for more durable blast resistance. The paper briefly reviewed the progress of studies on this aspect to provide the interest information for rice disease resistance breeding. This review includes examples of how advanced molecular method have been used in breeding programs for improving blast resistance. New information and knowledge gained from previous research on the recent strategy and challenges towards improvement of blast disease such as pyramiding disease resistance gene for creating new rice varieties with high resistance against multiple diseases will undoubtedly provide new insights into the rice disease control.

No MeSH data available.


Related in: MedlinePlus