Genotypic variability and aggressiveness of Bipolaris oryzae in the Philippines

Burgos, M. R. G.; Katimbang, M.L.B.; Paz, Michelle A.; Beligan, G. A.; Oña, I.; Mauleon, Ramil; Ardales, E. Y.; Cruz, C. M. Vera

doi:10.1007/s10658-013-0256-x

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…Bipolaris oryzae is genetically diverse in Bangladesh ( Kamal and Mia 2009 ), the Philippines ( Burgos et al 2013 ), India ( Archana et al 2014 ), and Iran ( Ahmadpour et al 2018 ). Inoculation of seedlings of 80 rice varieties with 107 B. oryzae isolates collected from various regions in Japan revealed significant differences in pathogenicity; in some cases, the reaction was reversed depending on the combination of variety and isolate ( Ohata 1989 ).…”

Section: Discussionmentioning

confidence: 99%

Breeding and characterization of the world’s first practical rice variety with resistance to brown spot (<i>Bipolaris oryzae</i>) bred using marker-assisted selection

et al. 2021

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Brown spot (BS) caused by Bipolaris oryzae is a serious disease of rice and decreases grain yield. Breeding for BS resistance is an economical solution but has not hitherto been achieved. To develop a practical BSresistant variety, we introduced a chromosomal segment including a quantitative trait locus (QTL) for BS resistance, qBSfR11, derived from the BS-resistant local resource 'Tadukan', into the genetic background of the high-yielding but susceptible 'Mienoyume'. Resistance is controlled by a single recessive gene in a 1.3-Mbp region. We named this gene bsr1 (brown spot resistance 1). The near-isogenic line bsr1-NIL had a greater yield with larger grain width than Mienoyume but similar other agronomic traits in fields where BS was mild; it had a significantly lower BS disease score and a 28.8% higher yield in fields where BS was more severe, and it showed resistance to multiple isolates of BS fungus. It showed stable resistance to BS and had excellent agricultural traits in the presence of BS. We developed the bsr1-NIL with resistance to BS and applied it for variety registration to Ministry of Agriculture, Forestry and Fisheries in Japan as 'Mienoyume BSL'. This is the first report for the BS resistant rice variety bred using marker-assisted selection.

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Section: Discussionmentioning

confidence: 99%

Breeding and characterization of the world’s first practical rice variety with resistance to brown spot (<i>Bipolaris oryzae</i>) bred using marker-assisted selection

et al. 2021

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“…Bipolaris oryzae is genetically diverse in Bangladesh (Kamal and Mia 2009), the Philippines (Burgos et al 2013), India (Archana et al 2014), and Iran (Ahmadpour et al 2018). Inoculation of seedlings of 80 rice varieties with 107 B. oryzae isolates collected from various regions in Japan revealed signi cant differences in pathogenicity; in some cases, the reaction was reversed depending on the combination of variety and isolate (Ohata 1989).…”

Section: Characteristics Of Bsr1-nilmentioning

confidence: 99%

Breeding and Characterization of The World’s First Practical Rice Variety With Resistance to Brown Spot (Bipolaris Oryzae)

Matsumoto¹,

Ota²,

Yamakawa³

et al. 2021

Preprint

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Background: Brown spot (BS) caused by Bipolaris oryzae is a serious disease of rice and decreases grain yield. Breeding for BS resistance is an economical solution but has not hitherto been achieved.Results: To develop a practical BS-resistant variety, we introduced a chromosomal segment including a quantitative trait locus (QTL) for BS resistance, qBSfR11, derived from the BS-resistant local resource ‘Tadukan’, into the genetic background of the high-yielding but susceptible ‘Mienoyume’. Resistance is controlled by a single recessive gene in a 1.3-Mbp region. We named this gene bsr1 (brown spot resistance 1). The near-isogenic line bsr1-NIL had a greater yield with larger grain width than Mienoyume but similar other agronomic traits in fields where BS was mild; it had a significantly lower BS disease score and a 28.8% higher yield in fields where BS was more severe, and it showed resistance to multiple isolates of BS fungus. It showed stable resistance to BS and had excellent agricultural traits in the presence of BS.Conclusions: We developed the bsr1-NIL with resistance to BS and applied it for variety registration to Ministry of Agriculture, Forestry and Fisheries in Japan as ‘Mienoyume BSL’. It is the world’s first practical breeding variety with resistance to BS.

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“…Rice is one of the most important cereal crops and feeds more than one third of the world's population (Burgos et al, 2013). Rice is susceptible to several leaf spot diseases including blast and brown spot, which cause significant yield losses across the globe.…”

Section: Introductionmentioning

confidence: 99%

Morphological Characterization of Bipolaris oryzae Causing Brown Spot Disease of Rice

Valarmathi¹,

Ladhalakshmi²

2018

Int.J.Curr.Microbiol.App.Sci

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It especially occurs in the environment where scarce water resource combined with nutritional imbalance particularly lack of nitrogen and often referred to as "Poor man's disease'' (Baranwal et al., 2013).The pathogen attacks the crop from seedling to milky stage. The symptoms appear as minute spots on the coleoptile, leaf blade, leaf sheath and glume, being most prominent on leaf blades and glumes. On leaves, typical spots are brown in colour with grey or whitish centre resembling sesame seed with typical yellow halo over the spot (Sunder et al., 2005). Conidia are 5-10 septate with the oldest

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Genotypic variability and aggressiveness of Bipolaris oryzae in the Philippines

Cited by 12 publications

References 18 publications

Breeding and characterization of the world’s first practical rice variety with resistance to brown spot (<i>Bipolaris oryzae</i>) bred using marker-assisted selection

Breeding and characterization of the world’s first practical rice variety with resistance to brown spot (<i>Bipolaris oryzae</i>) bred using marker-assisted selection

Breeding and Characterization of The World’s First Practical Rice Variety With Resistance to Brown Spot (Bipolaris Oryzae)

Morphological Characterization of Bipolaris oryzae Causing Brown Spot Disease of Rice

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