scholarly journals Quantitative Trait Loci Analysis of Powdery Mildew Disease Resistance in the Arabidopsis thaliana Accession Kashmir-1

Genetics ◽  
2001 ◽  
Vol 158 (3) ◽  
pp. 1301-1309 ◽  
Author(s):  
Iain W Wilson ◽  
Céline L Schiff ◽  
Douglas E Hughes ◽  
Shauna C Somerville
Keyword(s):  
Arabidopsis Thaliana ◽  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Quantitative Trait ◽  
Recombinant Inbred Lines ◽  
Trait Loci ◽  
Powdery Mildew Disease ◽  
Model Plant Arabidopsis Thaliana ◽  
Chromosome Iii

Abstract Powdery mildew diseases are economically important diseases, caused by obligate biotrophic fungi of the Erysiphales. To understand the complex inheritance of resistance to the powdery mildew disease in the model plant Arabidopsis thaliana, quantitative trait loci analysis was performed using a set of recombinant inbred lines derived from a cross between the resistant accession Kashmir-1 and the susceptible accession Columbia glabrous1. We identified and mapped three independent powdery mildew quantitative disease resistance loci, which act additively to confer disease resistance. The locus with the strongest effect on resistance was mapped to a 500-kbp interval on chromosome III.

scholarly journals Mapping Quantitative Trait Loci Affecting Arabidopsis thaliana Seed Morphology Features Extracted Computationally From Images

2013 ◽  
Vol 3 (1) ◽  
pp. 109-118 ◽  
Author(s):  
Candace R Moore ◽  
David S Gronwall ◽  
Nathan D Miller ◽  
Edgar P Spalding
Keyword(s):  
Arabidopsis Thaliana ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Major Axis ◽  
Seed Morphology ◽  
Size And Shape ◽  
Trait Loci ◽  
Axis Length

Abstract Seeds are studied to understand dispersal and establishment of the next generation, as units of agricultural yield, and for other important reasons. Thus, elucidating the genetic architecture of seed size and shape traits will benefit basic and applied plant biology research. This study sought quantitative trait loci (QTL) controlling the size and shape of Arabidopsis thaliana seeds by computational analysis of seed phenotypes in recombinant inbred lines derived from the small-seeded Landsberg erecta × large-seeded Cape Verde Islands accessions. On the order of 103 seeds from each recombinant inbred line were automatically measured with flatbed photo scanners and custom image analysis software. The eight significant QTL affecting seed area explained 63% of the variation, and overlapped with five of the six major-axis (length) QTL and three of the five minor-axis (width) QTL, which accounted for 57% and 38% of the variation in those traits, respectively. Because the Arabidopsis seed is exalbuminous, lacking an endosperm at maturity, the results are relatable to embryo length and width. The Cvi allele generally had a positive effect of 2.6–4.0%. Analysis of variance showed heritability of the three traits ranged between 60% and 73%. Repeating the experiment with 2.2 million seeds from a separate harvest of the RIL population and approximately 0.5 million seeds from 92 near-isogenic lines confirmed the aforementioned results. Structured for download are files containing phenotype measurements, all sets of seed images, and the seed trait measuring tool.

scholarly journals Quantitative Trait Loci Analysis of Water and Anion Contents in Interaction With Nitrogen Availability in Arabidopsis thaliana

Genetics ◽  
2003 ◽  
Vol 163 (2) ◽  
pp. 711-722 ◽  
Author(s):  
Olivier Loudet ◽  
Sylvain Chaillou ◽  
Anne Krapp ◽  
Françoise Daniel-Vedele
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Variation ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Genetic Basis ◽  
Nitrogen Availability ◽  
Recombinant Inbred Lines ◽  
Transport Systems ◽  
New Genes ◽  
Trait Loci

Abstract In plants, water and anion parameters are linked, for example through the integration of nutritional signaling and the response to diverse stress. In this work, Arabidopsis thaliana is used as a model system to dissect the genetic variation of these parameters by quantitative trait loci (QTL) mapping in the 415 recombinant inbred lines of the Bay-0 × Shahdara population. Water, nitrate, chloride, and phosphate contents were measured at the vegetative stage in the shoots of plants grown in controlled conditions. Two contrasting nitrogen (N) conditions were studied, one leading to the complete depletion of the nitrate pool in the plants. Most of the observed genetic variation was identified as QTL, with medium but also large phenotypic contributions. QTL colocalization provides a genetic basis for the correlation between water and nitrate contents in nonlimiting N conditions and water and chloride contents in limiting N conditions. The 34 new QTL described here represent at least 19 loci polymorphic between Bay-0 and Shahdara; some may correspond to known genes from water/anion transport systems, while others clearly identify new genes controlling or interacting with water/anion absorption and accumulation. Interestingly, flowering-time genes probably play a role in the regulation of water content in our conditions.

Identification of quantitative trait loci underlying lutein content in soybean seeds across multiple environments

2017 ◽  
Vol 155 (8) ◽  
pp. 1263-1271 ◽  
Author(s):  
W. L. TENG ◽  
W. J. FENG ◽  
J. Y. ZHANG ◽  
N. XIA ◽  
J. GUO ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Phenotypic Variation ◽  
Quantitative Trait ◽  
Average Distance ◽  
Recombinant Inbred Lines ◽  
Chromosome 9 ◽  
Soybean Seeds ◽  
Trait Loci ◽  
Breeding Programmes ◽  
Lutein Content

SUMMARYLutein benefits human health significantly, including that of the eyes, skin and heart. Therefore, increasing lutein content in soybean seeds is an important objective for breeding programmes. However, no information about soybean lutein-related quantitative trait loci (QTL) has been reported, as of 2016. The aim of the present study was to identify QTLs underlying the lutein content in soybean seeds. A population including 129 recombinant inbred lines was developed from the cross between ‘Dongnong46’ (lutein 13·10 µg/g) and ‘L-100’ (lutein 23·96 µg/g), which significantly differed in seed lutein contents. This population was grown in ten environments including Harbin in 2012, 2013, 2014 and 2015; Hulan in 2013, 2014 and 2015; and Acheng in 2013, 2014 and 2015. A total of 213 simple sequence repeat markers were used to construct the genetic linkage map, which covered approximately 3623·39 cM, with an average distance of 17·01 cM between markers. In the present study, eight QTLs associated with lutein content were found initially, which could explain 1·01–19·66% of the observed phenotypic variation in ten different tested environments. The phenotypic contribution of qLU-1 (located near BARC-Satt588 on chromosome 9 (Chr 9; linkage group (LG) K)) was >10% across seven tested environments, while qLU-2 (located near Satt192 of Chr 12 (LG H)) and qLU-3 (located near Satt353 of Chr12 (LGH)) could explain 5–10% of the observed phenotypic variation in more than seven environments, respectively. qLU-5, qLU-6, qLU-7 and qLU-8 could be detected in more than four environments. These eight QTLs were novel, and have considerable potential value for marker-assistant selection of higher lutein content in soybean lines.

scholarly journals Genetic analysis identifies quantitative trait loci controlling rosette mineral concentrations in Arabidopsis thaliana under drought

2009 ◽  
Vol 184 (1) ◽  
pp. 180-192 ◽  
Author(s):  
Artak Ghandilyan ◽  
Luis Barboza ◽  
Sébastien Tisné ◽  
Christine Granier ◽  
Matthieu Reymond ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Quantitative Trait Loci ◽  
Genetic Analysis ◽  
Quantitative Trait ◽  
Trait Loci ◽  
Mineral Concentrations

Quantitative trait loci associated with resistance to powdery mildew in Cornus florida

2017 ◽  
Vol 226 ◽  
pp. 322-326
Author(s):  
Lipi Parikh ◽  
M.T. Mmbaga ◽  
G. Meru ◽  
G. Zhang ◽  
L. Mackasmiel ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Quantitative Trait ◽  
Cornus Florida ◽  
Trait Loci
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