scholarly journals Quantitative Trait Loci Conditioning Resistance to Phaeosphaeria Leaf Spot of Maize Caused by Phaeosphaeria maydis

Plant Disease ◽  
2005 ◽  
Vol 89 (6) ◽  
pp. 571-574 ◽  
Author(s):  
M.L. Carson ◽  
C.W. Stuber ◽  
M.L. Senior
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Inbred Lines ◽  
Inheritance Of Resistance ◽  
Additive Interaction ◽  
Trait Loci ◽  
The Cross ◽  
Southern Florida ◽  
Ri Lines

Phaeosphaeria leaf spot (PLS) is a potentially important disease of maize (Zea mays) that has appeared in winter breeding nurseries in southern Florida. Inbred lines related to B73 are particularly susceptible to Phaeosphaeria leaf spot, whereas inbreds related to Mo17 are highly resistant. A previous study of the inheritance of resistance to Phaeosphaeria leaf spot in the cross B73 × Mo17 found that resistance is highly heritable and controlled by mostly additive gene action at three or four loci. In this study, we used 158 recombinant inbred (RI) lines derived from the cross B73 × Mo17 to map quantitative trait loci (QTL) governing resistance. The RI lines along with the parent inbred lines and the F1 were evaluated for PLS resistance in replicated trials over two winter growing seasons in southern Florida. Using the composite interval mapping (CIM) function of PLABQTL software, five QTL on four different chromosomes were found to control PLS resistance in Mo17. In addition, the × additive interaction between two of these QTL was found to be significant. Our results are in close agreement with the previous study, where generation mean analysis was used to study the inheritance of resistance to PLS.

Mapping quantitative trait loci conferring resistance to Marssonina leaf spot disease in Populus deltoides

Trees ◽  
2019 ◽  
Vol 33 (3) ◽  
pp. 697-706
Author(s):  
Hairong Jiang ◽  
Zhibing Wan ◽  
Min Liu ◽  
Jing Hou ◽  
Tongming Yin
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Populus Deltoides ◽  
Leaf Spot Disease ◽  
Spot Disease ◽  
Trait Loci

scholarly journals Two alternative recessive quantitative trait loci influence resistance to spring black stem and leaf spot in Medicago truncatula

2008 ◽  
Vol 8 (1) ◽  
pp. 30 ◽  
Author(s):  
Lars G Kamphuis ◽  
Judith Lichtenzveig ◽  
Richard P Oliver ◽  
Simon R Ellwood
Keyword(s):  
Quantitative Trait Loci ◽  
Medicago Truncatula ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Trait Loci

Genetic mapping of quantitative trait loci and a major locus for resistance to grey leaf spot in maize

2020 ◽  
Vol 133 (8) ◽  
pp. 2521-2533 ◽  
Author(s):  
Lei Du ◽  
Feng Yu ◽  
Hao Zhang ◽  
Bo Wang ◽  
Kejun Ma ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Genetic Mapping ◽  
Quantitative Trait ◽  
Leaf Spot ◽  
Major Locus ◽  
Grey Leaf Spot ◽  
Trait Loci

scholarly journals Quantitative trait loci for lifespan of mated Drosophila melanogaster affect both sexes

2002 ◽  
Vol 80 (3) ◽  
pp. 225-230 ◽  
Author(s):  
SARAH G. REIWITCH ◽  
SERGEY V. NUZHDIN
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Specific Effects ◽  
Genome Wide ◽  
Evolution Of Life ◽  
Trait Loci ◽  
Males And Females ◽  
Qtls Mapping

The properties of alleles at quantitative trait loci (QTLs) contributing to variation in lifespan should be described to determine the mechanisms of evolution of life length and to predict its future changes. Previously, we and others conducted genome-wide screens for QTLs that segregate among one panel of recombinant inbred lines (RILs) using a dense molecular marker map. In non-stressful conditions, QTLs effecting the lifespans of virgin females and males were frequently sex specific. In an unrelated panel of RILs, the effects of QTLs in flies maintained in cages with mixed sexes were similar in both sexes. Here, we re-measured the lifespans of the former panel of RILs in cages with mixed sex cohorts. Lifespan declined owing to mating. The amount of decline correlated between sexes within lines. QTLs mapping to the intervals 15A–19C, 50B–57C, 63A–65A, and 96F–99B had similar effects on the lifespans of both males and females. These QTLs have previously been detected in virgin flies surveys and had sex- and/or environment-specific effects.

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