scholarly journals Inheritance and Quantitative Trait Loci Analysis of Resistance Genes to Bruchid and Bean Bug in Mungbean (Vigna radiata L. Wilczek)

2015 ◽  
Vol 3 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Myon-Gi Hong ◽  
Kil-Hyun Kim ◽  
Ja-Hwan Ku ◽  
Jin-Kyo Jeong ◽  
Min-Jung Seo ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Vigna Radiata ◽  
Trait Loci ◽  
Bean Bug

scholarly journals Relationship Between Loci Conferring Downy Mildew and Powdery Mildew Resistance in Melon Assessed by Quantitative Trait Loci Mapping

2005 ◽  
Vol 95 (5) ◽  
pp. 556-565 ◽  
Author(s):  
L. Perchepied ◽  
M. Bardin ◽  
C. Dogimont ◽  
M. Pitrat
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Downy Mildew ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Pseudoperonospora Cubensis ◽  
Podosphaera Xanthii ◽  
Resistance Qtl ◽  
Trait Loci ◽  
Artificial Inoculations

Partial resistance to downy mildew (Pseudoperonospora cubensis) and complete resistance to powdery mildew (Podosphaera xanthii races 1, 2, 3, and 5 and Golovinomyces cichoracearum race 1) were studied using a recombinant inbred line population between ‘PI 124112’ (resistant to both diseases) and ‘Védrantais’ (susceptible line). A genetic map of melon was constructed to tag these resistances with DNA markers. Natural and artificial inoculations of Pseudoperonospora cubensis were performed and replicated in several locations. One major quantitative trait loci (QTL), pcXII.1, was consistently detected among the locations and explained between 12 to 38% of the phenotypic variation for Pseudoperonospora cubensis resistance. Eight other Pseudoperonospora cubensis resistance QTL were identified. Artificial inoculations were performed with several strains of four races of Podosphaera xanthii and one race of G. cichoracearum. Two independent major genes, PmV.1 and PmXII.1, were identified and shown to be involved in the simple resistance to powdery mildew. Three digenic epistatic interactions involving four loci were detected for two races of Podosphaera xanthii and one race of G. cichoracearum. Co-localization between PmV.1, resistance genes, and resistance genes homologues was observed. Linkage between the major resistance QTL to Pseudoperonospora cubensis, pcXII.1, and one of the two resistance genes to powdery mildew, PmXII.1, was demonstrated.

scholarly journals Quantitative Trait Loci (QTL) Analysis Reveals Both Broad-Spectrum and Isolate-Specific QTL for Scab Resistance in an Apple Progeny Challenged with Eight Isolates of Venturia inaequalis

2004 ◽  
Vol 94 (4) ◽  
pp. 370-379 ◽  
Author(s):  
F. Calenge ◽  
A. Faure ◽  
M. Goerre ◽  
C. Gebhardt ◽  
W. E. Van de Weg ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Resistance Gene ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Venturia Inaequalis ◽  
Scab Resistance ◽  
Breeding Programs ◽  
Apple Breeding ◽  
Trait Loci ◽  
New Races

The major scab resistance gene Vf, extensively used in apple breeding programs, was recently overcome by the new races 6 and 7 of the fungal pathogen Venturia inaequalis. New, more durable, scab resistance genes are needed in apple breeding programs. F1 progeny derived from the cross between partially resistant apple cv. Discovery and apple hybrid ‘TN10-8’ were inoculated in the greenhouse with eight isolates of V. inaequalis, including isolates able to overcome Vf. One major resistance gene, Vg, and seven quantitative trait loci (QTL) were identified for resistance to these isolates. Three QTL on linkage group (LG)12, LG13, and LG15 were clearly isolate-specific. Another QTL on LG5 was detected with two isolates. Three QTL on LG1, LG2, and LG17 were identified with most isolates tested, but not with every isolate. The QTL on LG2 displayed alleles conferring different specificities. This QTL co-localized with the major scab resistance genes Vr and Vh8, whereas the QTL on LG1 colocalized with Vf. These results contribute to a better understanding of the genetic basis of the V. inaequalis-Malus × domestica interaction.

Quantitative trait loci mapping of Cercospora leaf spot resistance in mungbean, Vigna radiata (L.) Wilczek

2010 ◽  
Vol 28 (2) ◽  
pp. 255-264 ◽  
Author(s):  
Sompong Chankaew ◽  
Prakit Somta ◽  
Worawit Sorajjapinun ◽  
Peerasak Srinives
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Vigna Radiata ◽  
Quantitative Trait Loci Mapping ◽  
Cercospora Leaf Spot ◽  
Trait Loci

scholarly journals A Genome-Wide Meta-Analysis of Rice Blast Resistance Genes and Quantitative Trait Loci Provides New Insights into Partial and Complete Resistance

2008 ◽  
Vol 21 (7) ◽  
pp. 859-868 ◽  
Author(s):  
Elsa Ballini ◽  
Jean-Benoît Morel ◽  
Gaétan Droc ◽  
Adam Price ◽  
Brigitte Courtois ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Rice Blast ◽  
Blast Resistance ◽  
Durable Resistance ◽  
Rice Genome ◽  
Blast Disease ◽  
Trait Loci ◽  
Blast Resistance Genes

The completion of the genome sequences of both rice and Magnaporthe oryzae has strengthened the position of rice blast disease as a model to study plant–pathogen interactions in monocotyledons. Genetic studies of blast resistance in rice were established in Japan as early as 1917. Despite such long-term study, examples of cultivars with durable resistance are rare, partly due to our limited knowledge of resistance mechanisms. A rising number of blast resistance genes and quantitative trait loci (QTL) have been genetically described, and some have been characterized during the last 20 years. Using the rice genome sequence, can we now go a step further toward a better understanding of the genetics of blast resistance by combining all these results? Is such knowledge appropriate and sufficient to improve breeding for durable resistance? A review of bibliographic references identified 85 blast resistance genes and approximately 350 QTL, which we mapped on the rice genome. These data provide a useful update on blast resistance genes as well as new insights to help formulate hypotheses about the molecular function of blast QTL, with special emphasis on QTL for partial resistance. All these data are available from the OrygenesDB database.

scholarly journals Comparison and Confirmation of Quantitative Trait Loci Conferring Partial Resistance to Rice Sheath Blight on Chromosome 9

Plant Disease ◽  
2014 ◽  
Vol 98 (7) ◽  
pp. 957-964 ◽  
Author(s):  
S. M. Zuo ◽  
Y. J. Zhu ◽  
Y. J. Yin ◽  
H. Wang ◽  
Y. F. Zhang ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Complex Trait ◽  
Susceptible Variety ◽  
Sheath Blight ◽  
Chromosome 9 ◽  
Substitution Lines ◽  
Trait Loci ◽  
Segment Substitution

Sheath blight (SB), caused by Rhizoctonia solani, is one of the worst rice (Orzya sativa) diseases worldwide. Resistance to the SB disease in rice is a complex trait controlled by quantitative trait loci (QTLs). Through map integration, we found several previously identified SB resistance (SBR) QTLs reported in inconsistent regions on the long arm of chromosome 9. Five of them were detected on ‘Jasmine 85’ (J85), ‘Minghui 63’ (MH63), and ‘Lemont’ (LMNT) rice and were designated qSB-9J85-1, qSB-9J85-2, qSB-9MH63-1, qSB-9MH63-2, and qSB-9LMNT, respectively, in the present study. To further verify and physically map the five potential SBR QTLs, we introduced these SBR QTLs into a common susceptible variety (LMNT) and developed a few chromosomal segment substitution lines through marker-assisted selection. After artificial inoculation with the SB fungus, we were able to validate qSB-9J85-2 but not the other four SBR QTLs; whereas, on MH63, an SBR QTL designated qSB-9MH63-3 was confirmed in the region defined by markers Y83 and Y91.8 that included qSB-9J85-2, covering approximately 1,235 kb. Both qSB-9J85-2 and qSB-9MH63-3 appeared to be dominant resistance genes and contributed to similar levels to SB resistance, reducing SB disease severity by approximately 1.0 on a 0-to-9 SB disease rating system. After comparing with another confirmed SBR QTL (qSB-9TQ) from ‘Teqing’ rice (TQ), we conclude that qSB-9J85-2, qSB-9MH63-3, and qSB-9TQ are probably controlled by the same allelic resistance genes. These results will accelerate the utilization of this major SBR QTL and its map-based cloning.

Mapping and Quantitative Trait Loci Analysis of Verticillium Wilt Resistance Genes in Cotton

2008 ◽  
Vol 50 (2) ◽  
pp. 174-182 ◽  
Author(s):  
Hong-Mei Wang ◽  
Zhong-Xu Lin ◽  
Xian-Long Zhang ◽  
Wei Chen ◽  
Xiao-Ping Guo ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Verticillium Wilt ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Wilt Resistance ◽  
Verticillium Wilt Resistance ◽  
Trait Loci

scholarly journals Detection of quantitative trait loci for mungbean yellow mosaic India virus (MYMIV) resistance in mungbean (Vigna radiata (L.) Wilczek) in India and Pakistan

2013 ◽  
Vol 63 (4) ◽  
pp. 367-373 ◽  
Author(s):  
Ratanakorn Kitsanachandee ◽  
Prakit Somta ◽  
Orawan Chatchawankanphanich ◽  
Khalid P. Akhtar ◽  
Tariq Mahmud Shah ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Vigna Radiata ◽  
Trait Loci

scholarly journals Mapping and validation of quantitative trait loci that confer resistance to rice black-streaked dwarf virus disease in rice (Oryza sativa)

2020 ◽  
Author(s):  
honggen zhang ◽  
Ruixuan Wang ◽  
Zuopeng Xu ◽  
Jiangning Liu ◽  
Guofang Lan ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Resistance Genes ◽  
Quantitative Trait ◽  
Marker Assisted Selection ◽  
Disease Incidence ◽  
Gene Pyramiding ◽  
Dwarf Virus ◽  
Breeding Value ◽  
Trait Loci

Abstract Background: Rice black-streaked dwarf virus (RBSDV) disease is one of the most destructive viral diseases that threatens rice production in China. Breeding of resistant cultivars through multi-gene pyramiding is considered to be an effective way to control the disease, but few resistance genes have been characterized to date.Results; In the present study, we identified T1012, a BC2F6 line from a cross of the japonica variety ‘Wuyujing3’ (recipient) and the indica variety ‘Dular’ (donor), that had improved resistance to RBSDV disease in a field test, and 140 chromosome segment substitution lines (CSSLs) derived from a cross of between T1012 and ‘Wuyujing3’ were developed using marker-assisted selection. Genetic analysis showed that the resistance of T1012 to RBSDV disease was controlled by quantitative trait loci (QTLs). Two QTLs for RBSDV disease resistance located on chromosomes 1 and 4, qRBSDV-1 and qRBSDV-4, were identified, and qRBSDV-4 was repeatedly detected in two environments. Compared to ‘Wuyujing3’, the CSSL containing only the substitution segment covering qRBSDV-4 exhibited significantly decreased disease incidence, indicating that qRBSDV-4 is a reliable resistance QTL with a high breeding value. Furthermore, two linked QTLs, qRBSDV-4-1 and qRBSDV-4-2, were identified within the interval containing qRBSDV-4.Conclusions: The QTLs identified here will provide a useful resource for breeding RBSDV-resistant rice cultivars through marker-assisted selection and establish a foundation for the cloning of RBSDV disease resistance genes.

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