Fine mapping of three quantitative trait loci for late blight resistance in tomato using near isogenic lines (NILs) and sub-NILs

2003 ◽  
Vol 108 (4) ◽  
pp. 628-638 ◽  
Author(s):  
D. J. Brouwer ◽  
D. A. St. Clair
Keyword(s):  
Quantitative Trait Loci ◽  
Late Blight ◽  
Fine Mapping ◽  
Quantitative Trait ◽  
Late Blight Resistance ◽  
Blight Resistance ◽  
Near Isogenic Lines ◽  
Isogenic Lines ◽  
Trait Loci

Mapping of candidate genes associated with late blight resistancein potato and comparison of their location with known quantitative trait loci

2008 ◽  
Vol 88 (4) ◽  
pp. 599-610 ◽  
Author(s):  
Z. D. Tian ◽  
J. Liu ◽  
L. Portal ◽  
M. Bonierbale ◽  
C. H. Xie
Keyword(s):  
Quantitative Trait Loci ◽  
Late Blight ◽  
Candidate Gene ◽  
Candidate Genes ◽  
Quantitative Trait ◽  
Late Blight Resistance ◽  
Blight Resistance ◽  
Gene Markers ◽  
Trait Loci ◽  
Candidate Gene Markers

Phytophthora infestans, the causal agent of late blight, threatens potato production worldwide. Many quantitative trait loci (QTL) for late blight resistance have been mapped in several potato populations. At the same time, numerous expressed sequences tags (EST) related to late blight resistance have been deposited in databases. In order to screen for putative candidate genes associated with late blight resistance, 65 candidate genes were selected for mapping and investigation of their relationship with QTL in three diploid potato populations PCC1, BCT, and PD. In total, 26 primers from the 65 selected genes that showed PCR length polymorphism were mapped on the linkage groups of three populations. Further comparison between map location of QTL and candidate gene loci indicated that three candidate gene markers were placed in a QTL region. The locus of a putative receptor-like protein kinase b co-localized with an important QTL region on chromosome XI of PCC1. In the PD population, the Lox gene was in a QTL with moderate effect on chromosome III and two protein phosphatase loci were localized in a QTL with the largest effect on chromosome XII. These mapped candidate gene markers could be used as a bridge to other genetic maps of potato. The association of candidate genes with QTL forms the basis for further studies on the contributions of these candidate genes to natural variation for potato late blight resistance. Key words: Candidate gene, quantitative resistance loci, late blight, potato

Quantitative Trait Loci Influencing Mycotoxin Contamination of Maize: Analysis by Linkage Mapping, Characterization of Near-Isogenic Lines, and Meta-Analysis

Crop Science ◽  
2014 ◽  
Vol 54 (1) ◽  
pp. 127-142 ◽  
Author(s):  
Santiago X. Mideros ◽  
Marilyn L. Warburton ◽  
Tiffany M. Jamann ◽  
Gary L. Windham ◽  
W. Paul Williams ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Linkage Mapping ◽  
Meta Analysis ◽  
Near Isogenic Lines ◽  
Mycotoxin Contamination ◽  
Isogenic Lines ◽  
Trait Loci

Identification of quantitative trait loci associated with oil content and development of near isogenic lines for stable qOC-A10 in Brasscia napus L.

2016 ◽  
Vol 96 (3) ◽  
pp. 423-432 ◽  
Author(s):  
Xiaomao Cheng ◽  
Shu Xia ◽  
Xihua Zeng ◽  
Jianxun Gu ◽  
Yuan Yang ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Oil Content ◽  
Seed Oil ◽  
Seed Quality ◽  
Quality Trait ◽  
Near Isogenic Lines ◽  
Seed Oil Content ◽  
Isogenic Lines ◽  
Trait Loci

Seed oil content is a key seed quality trait determining the economic value of rapeseed (Brassica napus L.). However, it is a complex quantitative trait controlled by multiple genes. To this point, its genetic mechanism in rapeseed remains to be revealed. In the present study, we separately identified the quantitative trait loci (QTL) controlling seed oil content of B. napus using three generations of recombinant inbred line (RIL) populations (F4:5, F5:6, and F6:7) derived from a cross of two contrasting parents (M201, a high-oil parent, and M202, a low-oil parent) in four trials. The results indicated that the additive effects may be the primary factors contributing to the variation in seed oil content in B. napus. A total of 15 QTL for seed oil content were mapped. Two of them, namely qOC-A9-3 and qOC-A10, were consistently detected across two and all four environments, respectively. Meanwhile, qOC-A10 showed a large effect on phenotypic variation in seed oil content. The stability and significance of qOC-A10 was also validated in the near isogenic lines (NILs-qOC-A10) developed from the RIL population (F4:5) using marker-assisted selection. The qOC-A10 is of particular interest for further fine mapping and map-based cloning.

scholarly journals Characterization of heterotic quantitative trait loci in maize by evaluation of near-isogenic lines and their crosses at two competition levels

2011 ◽  
Vol 124 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Elisabetta Frascaroli ◽  
Maria Angela Canè ◽  
Mario Enrico Pè ◽  
Giorgio Pea ◽  
Pierangelo Landi
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Near Isogenic Lines ◽  
Isogenic Lines ◽  
Trait Loci

Identification of cotton fiber quality quantitative trait loci using intraspecific crosses derived from two near-isogenic lines differing in fiber bundle strength

2014 ◽  
Vol 34 (2) ◽  
pp. 373-384 ◽  
Author(s):  
Md. S. Islam ◽  
Linghe Zeng ◽  
Christopher D. Delhom ◽  
Xianliang Song ◽  
Hee Jin Kim ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Cotton Fiber ◽  
Quantitative Trait ◽  
Fiber Bundle ◽  
Fiber Quality ◽  
Near Isogenic Lines ◽  
Isogenic Lines ◽  
Trait Loci ◽  
Cotton Fiber Quality
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