Mapping of QTLs involved in resistence to rice blast (Magnaporthe grisea) using Oryza minuta introgression lines

Rahman, Lutfor; Khanam, Sakina; Roh, Jee Hoon; Koh, Hee‐Jong

doi:10.17221/19/2011-cjgpb

Cited by 21 publications

(8 citation statements)

References 46 publications

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“…Epistasis as an important genetic basis of complex phenotypes has also been revealed in several recent QTL mapping studies Yu et al 1997;Ma et al 2005;Liu et al 2011;Rahman et al 2011;Borràs-Gelonch et al 2012;Krajewski et al 2012). However, marker-based analyses for estimation of QTL effects usually assume the absence of epistasis among QTLs (Lander and Botstein 1989;Jansen 1993;Zeng 1994;Bocianowski and Krajewski 2009;Rovaris et al 2011).…”

Section: Introductionmentioning

confidence: 81%

Estimation of epistasis in doubled haploid barley populations considering interactions between all possible marker pairs

Bocianowski

2013

Euphytica

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Epistasis, is the interaction between alleles from two or more loci determining complex traits, and thus plays an important role in the development of quantitative traits of crops. In mapping studies of inbreeding species epistasis is usually defined as the interactions between quantitative trait loci with significant additive gene effects. Indeed, in many studies, genes with small effects do not come into the final model and thus the total epistasis interaction effect is biased. Many loci may not have a significant direct effect on the trait under consideration, but they may still affect trait expression by interacting with other loci. In this paper the benefits of using all loci, not only the loci with significant main effects, for estimation of the epistatic effects are presented. The particular examples are with doubled haploids lines and so are restricted to homozygotes and thus additive genetic effects and additive 9 additive interactions. Numerical analyses were carried out on three populations of doubled haploid lines of barley (Hordeum vulgare L.): 120 doubled haploid lines from the Clipper 9 Sahara 3771 cross, 145 doubled haploid lines from the Harrington 9 TR306 cross and 150 doubled haploid lines from the Steptoe 9 Morex cross. In total, 157 sets of observations were analyzed and altogether 728 pairs of loci were observed for the three datasets.

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Section: Introductionmentioning

confidence: 81%

Estimation of epistasis in doubled haploid barley populations considering interactions between all possible marker pairs

Bocianowski

2013

Euphytica

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“…Two consistent QTLs for blast resistance were identified on chromosome 11 of the RILs population at two growth stages and multiple inconsistent QTLs were detected due to complex epistatic and environmental interactions (Li et al, 2008b,c). QTL mapping identified five loci against blast on chromosomes 6, 7, 9, and 11 (Rahman et al, 2011). Annotation analysis confirmed the presence of a nucleotide-binding site and leucine-rich repeat (NBS-LRR)-type; landmarks for resistance genes.…”

Section: Rice Blastmentioning

confidence: 91%

Preventing Potential Diseases of Crop Plants Under the Impact of a Changing Environment

Ilyas¹,

Rafique²,

Ahmed³

et al. 2014

Emerging Technologies and Management of Crop Stress Tolerance

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“…It was later mapped on chromosome 6 (Liu et al 2002) belonging to NBS-LRR class . Rahman et al (2011) conducted mapping of QTLs for blast disease resistance by using O. minuta introgression lines. They identified five QTLs located on chromosomes 6, 7, 9 and 11.…”

Section: Significance Of Rice Germplasmmentioning

confidence: 99%

Molecular breeding of rice for improved disease resistance, a review

Khan

2015

Australasian Plant Pathol.

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Diseases are considered to be the major limiting factors in rice production around the globe. Considering rice as an important cereal crop, developing disease resistant cultivars is a prime objective of breeders. Compared to conventional breeding, molecular breeding especially using marker assisted selection appears to be more effective and precise. The best management of disease is to bring durable wide spectrum resistance in rice cultivars. This can be accomplished by accumulating both qualitative and quantitative resistance genes in to rice cultivars. Introducing these resistance genes from the wild relatives of rice in to commercial cultivars has greatly helped the breeders to accomplish this task. Marker assisted selection is extremely valuable in resolving the issues the breeders face with traditional breeding. A number of transgenic rice lines harboring the so called 'foreign' resistant genes have been produced. However such promising lines must be extensively replicated in fields to evaluate stable integration and continued expression of genes. None the less identification of disease resistance genes and quantitative trait loci (QTLs), use of marker assisted selection along with gene pyramiding and transgenic approaches all provide breeders a hope to build high yielding disease resistant cultivars. Based on such premises, we can truly envision broadening of our understanding the genetic and molecular basis of disease resistance in rice.

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Mapping of QTLs involved in resistence to rice blast (Magnaporthe grisea) using Oryza minuta introgression lines

Cited by 21 publications

References 46 publications

Estimation of epistasis in doubled haploid barley populations considering interactions between all possible marker pairs

Estimation of epistasis in doubled haploid barley populations considering interactions between all possible marker pairs

Preventing Potential Diseases of Crop Plants Under the Impact of a Changing Environment

Molecular breeding of rice for improved disease resistance, a review

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