An antixenosis component of rice resistance to African rice gall midge, &lt;i&gt;Orseolia oryzivora&lt;/i&gt;

Nwilene, F. E.; Okhidievbie, O.; agunbiade, TA; Ak, Traore; Gaston, LN; Togola, MA; Youm, O.

doi:10.3860/irrn.v34i0.1067

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…NERICA-L 19, NERICA-L 49, Cisadane, BW 348-1, Leizhung) have been developed and released for commercial cultivation in Africa. Nwilene et al (2009b) identified anti-xenotic and antibiotic traits associated with resistance to AfRGM in some of these rice varieties, but the traits have yet to be utilized in breeding. The quantitative trait loci (QTLs) or genes conferring resistance to AfRGM have also been identified from (O. sativa × O. glaberrima) crosses, ITA306 × TOS14519 and ITA306 × TOG7106.…”

Section: Varietal Resistancementioning

confidence: 99%

Managing insect pests of rice in Africa.

Nwilene¹,

Nacro²,

Tamò³

et al. 2013

Realizing Africa's Rice Promise

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In the search for sustainable management options to increase food security, an overall challenge is to increase yields and decrease losses during production and harvest without harming the environment and resource base for future generations of farmers and consumers. As such, integrated pest management (IPM) plays a key role in the context of sustainable agricultural development, by reducing crop losses and thereby increasing productivity while minimizing environmental contamination and health hazards. Integrated pest management has evolved from pesticide-abatement strategies into analytical approaches to understand pest status within production systems in order to make informed decisions on appropriate management options that incorporate social, economic, gender and environmental issues. This chapter discusses pre-and postharvest insect pests in rice and reviews approaches to reduce quantitative and qualitative losses incurred along the rice value chain, in the context of a

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Section: Varietal Resistancementioning

confidence: 99%

Managing insect pests of rice in Africa.

Nwilene¹,

Nacro²,

Tamò³

et al. 2013

Realizing Africa's Rice Promise

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show abstract

“…Since this species is inherently low yielding compared to O. sativa, its cultivation area has decreased (Linares, 2002). However, O. glaberrima can be a source of resistance to various indigenous biotic constraints such as rice yellow mottle virus (Abo et al, 1998;Ndjiondjop et al, 1999Ndjiondjop et al, , 2001Deless et al, 2010;Maji et al, 2010), African rice gall midge Williams et al, 1999;Nwilene et al, 2009), weeds Dingkuhn et al, 1999;Fofana and Rauber, 2000), and nematodes (Coyne et al, 1995Plowright et al, 1999;Soriano et al, 1999;Lorieux et al, 2003), and to abiotic stresses such as drought (Jones et al, 1997a(Jones et al, , 1997bMaji et al, 2010;Ndjiondjop et al, 2010), submergence (Futakuchi et al, 2001;Kawano et al, 2008), iron toxicity (Sahrawat and Sika, 2002) and low phosphorus availability in acid soils (Tobita et al, 2003). Thus, this species is highly adaptable to the local rice cultivation conditions in Africa.…”

Section: Origin Of Oryza Glaberrima and Its Role In Rice Breedingmentioning

confidence: 99%

Yield Potential and Physiological and Morphological Characteristics Related to Yield Performance inOryza glaberrimaSteud.

Futakuchi

Sié

Saito

2012

Plant Production Science

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“…The plots were hand-weeded at 21 and 40 days after transplanting. The pest evaluation experiments were repeated twice, each in three replications, the phenotypic traits studied was implemented as described by [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

“…sativa germplasm for AfRGM response have helped rice breeders to identify several varieties with a range of responses to AfRGM [ 2 , 5 , 11 , 12 , 17 – 19 ]. Based on quantitative comparisons of relative damage levels, we have developed mapping populations using TOG7106, TOS14519 and BW348-1, which are considered to be resistant, moderately resistant and tolerant to AfRGM, respectively [ 11 , 17 , 19 , 20 ]. Neither the genes or QTLs associated with resistance to AfRGM, nor their mode of action and phenotypic effects on these varieties, had yet been discovered.…”

Section: Introductionmentioning

confidence: 99%

QTL Mapping in Three Rice Populations Uncovers Major Genomic Regions Associated with African Rice Gall Midge Resistance

et al. 2016

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African rice gall midge (AfRGM) is one of the most destructive pests of irrigated and lowland African ecologies. This study aimed to identify the quantitative trait loci (QTL) associated with AfRGM pest incidence and resistance in three independent bi-parental rice populations (ITA306xBW348-1, ITA306xTOG7106 and ITA306xTOS14519), and to conduct meta QTL (mQTL) analysis to explore whether any genomic regions are conserved across different genetic backgrounds. Composite interval mapping (CIM) conducted on the three populations independently uncovered a total of 28 QTLs associated with pest incidence (12) and pest severity (16). The number of QTLs per population associated with AfRGM resistance varied from three in the ITA306xBW348-1 population to eight in the ITA306xTOG7106 population. Each QTL individually explained 1.3 to 34.1% of the phenotypic variance. The major genomic region for AfRGM resistance had a LOD score and R2 of 60.0 and 34.1% respectively, and mapped at 111 cM on chromosome 4 (qAfrGM4) in the ITA306xTOS14519 population. The meta-analysis reduced the number of QTLs from 28 to 17 mQTLs, each explaining 1.3 to 24.5% of phenotypic variance, and narrowed the confidence intervals by 2.2 cM. There was only one minor effect mQTL on chromosome 1 that was common in the TOS14519 and TOG7106 genetic backgrounds; all other mQTLs were background specific. We are currently fine-mapping and validating the major effect genomic region on chromosome 4 (qAfRGM4). This is the first report in mapping the genomic regions associated with the AfRGM resistance, and will be highly useful for rice breeders.

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An antixenosis component of rice resistance to African rice gall midge, <i>Orseolia oryzivora</i>

Cited by 5 publications

References 4 publications

Managing insect pests of rice in Africa.

Managing insect pests of rice in Africa.

Yield Potential and Physiological and Morphological Characteristics Related to Yield Performance inOryza glaberrimaSteud.

QTL Mapping in Three Rice Populations Uncovers Major Genomic Regions Associated with African Rice Gall Midge Resistance

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