Quantitative trait loci for plant height in four maize populations and their associations with qualitative genetic loci

1991 ◽  
Vol 83 (2) ◽  
pp. 141-145 ◽  
Author(s):  
W. D. Beavis ◽  
D. Grant ◽  
M. Albertsen ◽  
R. Fincher
Keyword(s):  
Quantitative Trait Loci ◽  
Plant Height ◽  
Quantitative Trait ◽  
Genetic Loci ◽  
Maize Populations ◽  
Trait Loci

Tagging quantitative trait loci for heading date and plant height in important breeding parents of rice (Oryza sativa)

Euphytica ◽  
2014 ◽  
Vol 197 (2) ◽  
pp. 191-200 ◽  
Author(s):  
Seonghee Lee ◽  
Melisa H. Jia ◽  
Yulin Jia ◽  
Guangjie Liu
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Plant Height ◽  
Quantitative Trait ◽  
Heading Date ◽  
Trait Loci

scholarly journals Quantitative Trait Loci for Adult-Plant Resistance to Mycosphaerella graminicola in Two Winter Wheat Populations

2011 ◽  
Vol 101 (10) ◽  
pp. 1209-1216 ◽  
Author(s):  
P. Risser ◽  
E. Ebmeyer ◽  
V. Korzun ◽  
L. Hartl ◽  
T. Miedaner
Keyword(s):  
Quantitative Trait Loci ◽  
Winter Wheat ◽  
Plant Height ◽  
Plant Resistance ◽  
Quantitative Trait ◽  
Adult Plant Resistance ◽  
Heading Date ◽  
Adult Plant ◽  
Phenotypic Variance ◽  
Trait Loci

Septoria tritici blotch (STB) is one of the most important leaf spot diseases in wheat worldwide. The goal of this study was to detect chromosomal regions for adult-plant resistance in large winter wheat populations to STB. Inoculation by two isolates with virulence to Stb6 and Stb15, both present in the parents, was performed and STB severity was visually scored plotwise as percent coverage of flag leaves with pycnidia-bearing lesions. ‘Florett’/‘Biscay’ and ‘Tuareg’/‘Biscay’, each comprising a cross of a resistant and a susceptible cultivar, with population sizes of 316 and 269 F7:8 recombinant inbred lines, respectively, were phenotyped across four and five environments and mapped with amplified fragment length polymorphism, diversity array technology, and simple sequence repeat markers covering polymorphic regions of ≈1,340 centimorgans. Phenotypic data revealed significant (P < 0.01) genotypic differentiation for STB, heading date, and plant height. Entry-mean heritabilities (h2) for STB were 0.73 for ‘Florett’/‘Biscay’ and 0.38 for ‘Tuareg’/‘Biscay’. All correlations between STB and heading date as well as between STB and plant height were low (r = –0.13 to –0.20). In quantitative trait loci (QTL) analysis, nine and six QTL were found for STB ratings explaining, together, 55 and 51% of phenotypic variation in ‘Florett’/‘Biscay’ and ‘Tuareg’/‘Biscay’, respectively. Genotype–environment and QTL–environment interactions had a large impact. Two major QTL were detected consistently across environments on chromosomes 3B and 6D from ‘Florett’ and chromosomes 4B and 6B from ‘Tuareg’, each explaining 12 to 17% of normalized adjusted phenotypic variance. These results indicate that adult-plant resistance to STB in both mapping populations was of a quantitative nature.

scholarly journals Erratum to: Quantitative Trait Loci (QTL) Underlying Biomass Yield and Plant Height in Switchgrass

2014 ◽  
Vol 7 (4) ◽  
pp. 1572-1572 ◽  
Author(s):  
Desalegn D. Serba ◽  
Guillaume Daverdin ◽  
Joseph H. Bouton ◽  
Katrien M. Devos ◽  
E. Charles Brummer ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Plant Height ◽  
Quantitative Trait ◽  
Biomass Yield ◽  
Trait Loci

scholarly journals Quantitative Trait Loci (QTL) Underlying Biomass Yield and Plant Height in Switchgrass

2014 ◽  
Vol 8 (1) ◽  
pp. 307-324 ◽  
Author(s):  
Desalegn D. Serba ◽  
Guillaume Daverdin ◽  
Joseph H. Bouton ◽  
Katrien M. Devos ◽  
E. Charles Brummer ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Plant Height ◽  
Quantitative Trait ◽  
Biomass Yield ◽  
Trait Loci

scholarly journals IDENTIFICACIÓN DE QTLs ASOCIADOS A CARACTERES DE ARQUITECTURA VEGETAL EN YUCA (Manihot esculenta)

2015 ◽  
Vol 21 (1) ◽  
Author(s):  
Camilo López ◽  
Ruben Eduardo Mora Moreno ◽  
Johana Carolina Soto
Keyword(s):  
Quantitative Trait Loci ◽  
Leaf Area ◽  
Plant Height ◽  
Quantitative Trait ◽  
Manihot Esculenta ◽  
Root Weight ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Trait Loci ◽  
Number Of Shoots

<p class="p1"><strong>RESUMEN</strong></p><p class="p2">La yuca (<em>Manihot esculenta</em>) es el cuarto cultivo en importancia a nivel mundial como fuente de calorías para la población humana después del arroz, el azúcar y el maíz, posicionándose por esta razón como un cultivo primordial para la seguridad alimentaria. Su arquitectura ha sido considerada como un factor clave que subyace a la fisiología del rendimiento, relacionando características morfológicas con productividad. En este trabajo se evaluaron diferentes características de arquitectura vegetal en yuca. Los caracteres fueron evaluados en una población F1 compuesta por 133 hermanos completos (familia K) sembrados en dos lugares biogeográficamente diferentes: La Vega (Cundinamarca) y Arauca (Arauca) en Colombia. Las características evaluadas relacionadas con la arquitectura vegetal fueron altura de la planta (AT), número de brotes (NB), longitud entrenudos (LE), número de raíces (NR), peso de raíces (PR), pigmentación del peciolo (PP), área de la hoja (AH) y tipo de hoja (TH). A partir de los datos obtenidos y empleando un mapa genético de alta densidad basado en SNPs (Single Nucleotide Polymorphisms) se llevó a cabo un análisis de QTLs (Quantitative Trait Loci). Se lograron identificar tres QTLs para La Vega asociados con los caracteres altura total, número de brotes y área de la hoja. Para Arauca se detectaron tres QTLs asociados con altura total, longitud de entrenudos y número de brotes. Los QTLs se distribuyeron en cuatro grupos de ligamiento y explicaron entre 18,93 y 41,92 % de la variación genética.</p><p class="p1"><strong>ABSTRACT</strong></p><p class="p2">Cassava (<em>Manihot esculenta</em>) is the fourth most important crop worldwide as a source of calories for the human population after rice, sugar and corn and therefore it is considered as a staple crop. Cassava’s architecture has been considered as a key factor underlying the physiology of yield, relating morphological traits with productivity. In this work different characteristics of plant architecture were evaluated in a cassava F1 population composed by 133 complete siblings (family K) planted in two biogeographically different zones: La Vega (Cundinamarca) and Arauca (Arauca) in Colombia. The characteristics evaluated related to the vegetal architecture were plant height (AT), number of shoots (NB), internodes length (LE), number of roots (NR), root weight (PR), petiole pigmentation (PP), leaf area (AH) and leaf type (TH). From the data obtained and using a SNP- (Single Nucleotide Polymorphism) high-density genetic map a QTLs analysis (Quantitative Trait Loci) was carried out. It was possible to identify three QTLs for La Vega associated with characters plant height, internodes length and leaf area. From the Arauca’s dataset, three QTLs were detected associated with plant height, number of shoots and internodes length. The QTLs were distributed into four linkage groups and explained between 18.93 and 41.92 % of genetic variation.</p><p class="p2"> </p>

Genetic resolution and verification of quantitative trait loci for flowering and plant height with recombinant inbred lines of maize

Genome ◽  
1996 ◽  
Vol 39 (5) ◽  
pp. 957-968 ◽  
Author(s):  
David F. Austin ◽  
Michael Lee
Keyword(s):  
Quantitative Trait Loci ◽  
Plant Height ◽  
Quantitative Trait ◽  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Length Polymorphisms ◽  
Trait Loci ◽  
Ear Height ◽  
Single Factor Analysis

Recombinant inbred (RI) lines offer several advantages for detecting quantitative trait loci (QTLs), including increased precision of trait measurements, power for detection of additive effects, and resolution of linked QTLs. This study was conducted to detect and characterize QTLs in maize for flowering and plant height and to compare QTL detection in an early (F2:3) generation of the same population. One hundred and eighty-six RIs from a cross between inbred lines Mo17 and H99 were evaluated in a replicated field experiment and analyzed at 101 loci detected by restriction fragment length polymorphisms. QTLs were identified by single-factor analysis of variance. A total of 59 QTLs were detected for plant height, ear height, top height, anthesis, silk emergence, and anthesis to silk interval. Individual QTLs explained 2.2–15.4% of trait variation, and multiple models including all QTLs detected for a trait explained up to 52.5% of the phenotypic variation. Comparison of QTLs detected with 150 F2:3 lines from the same population indicated that 16 (70%) of the 23 F2:3 QTLs were also observed in the F6:7 generation. Parental effects were consistent across generations. At 14 of the 16 QTLs detected in both generations, genetic effects were smaller in the F6:7. Also, some QTLs detected in the F2:3 were resolved into multiple linked QTLs in the F6:7, indicating the additional power of RI populations for mapping, with important implications for marker-assisted selection as well as map-based cloning of QTLs. Key words : Zea mays, RFLP, plant breeding, genetics, recombination.

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