Mapping QTL for yield components, vigor, and resistance to Phytophthora palmivora in Theobroma cacao L.

Genome ◽  
2003 ◽  
Vol 46 (2) ◽  
pp. 204-212 ◽  
Author(s):  
D Clement ◽  
A M Risterucci ◽  
J C Motamayor ◽  
J N'Goran ◽  
C Lanaud
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Agronomic Traits ◽  
Phytophthora Palmivora ◽  
Chromosome 4 ◽  
Genetic Groups ◽  
Trait Loci ◽  
Theobroma Cacao L ◽  
Average Individual

Quantitative trait loci (QTL) mapping for agronomic traits was carried out in cocoa (Theobroma cacao L.). Regions of the genome involved in yield, vigor, and resistance to Phytophthora palmivora were identified. Three heterozygous clones, one upper Amazon Forastero (IMC78) and two Trinitario (DR1 and S52), were crossed with the same male parent, a lower Amazon Forastero (Catongo), known to be highly homozygous. Observations were made on progeny over nine consecutive years. One to three QTL related to yield were detected in each of the three populations, located on chromosomes 1, 2, 4, 5, 9, and 10. They explained between 8.1 and 19.3% of the phenotypic variation and showed various levels of repeatability. In IMC78, the QTL detected on chromosome 5 was the most repeatable over years. The QTL for the average individual pod weight on chromosome 4 was the most significant with an LOD of 17.3 and an R2 of 43.7. QTL related to these traits were identified in the same region of the genome in clones of different genetic groups. This suggests that molecular markers can be used to improve cocoa varieties.Key words: Theobroma cacao, agronomic traits, quantitative trait loci (QTL).

Theobroma cacao L.: a genetic linkage map and quantitative trait loci analysis

1996 ◽  
Vol 93 (1-2) ◽  
pp. 205-214 ◽  
Author(s):  
D. Crouzillat ◽  
E. Lerceteau ◽  
V. Petiard ◽  
J. Morera ◽  
H. Rodriguez ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Trait Loci ◽  
Theobroma Cacao L

Mapping quantitative trait loci for bean traits and ovule number in Theobroma cacao L.

Genome ◽  
2003 ◽  
Vol 46 (1) ◽  
pp. 103-111 ◽  
Author(s):  
D Clement ◽  
A M Risterucci ◽  
J C Motamayor ◽  
J N'Goran ◽  
C Lanaud
Keyword(s):  
Quantitative Trait Loci ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Fragment Length Polymorphism ◽  
Shape Index ◽  
Interval Mapping ◽  
Trait Loci ◽  
Theobroma Cacao L

Quantitative trait loci (QTL) mapping for bean traits and the number of ovules per ovary was carried out in cocoa (Theobroma cacao L.) using three test-cross progenies derived from crosses between a lower Amazon Forastero male parent (Catongo) and three female parents: one upper Amazon Forastero (IMC78) and two Trinitario (DR1 and S52). RFLP (restriction fragment length polymorphism), microsatellite, and AFLP (amplified fragment length polymorphism) markers were used for mapping. Between one and six QTL for bean traits (length, weight, and shape index) and one and four QTL for the number of ovules per ovary were detected using composite interval mapping (CIM). Individual QTL explained between 5 and 24% of the phenotypic variation. QTL clusters were identified on several chromosomes, but particularly on chromosome 4. QTL related to bean traits were detected in the same region in both Trinitario parents and in a close region in the upper Amazon Forastero parent. In reference to a previous diversity study where alleles specific to Criollo and Forastero genotypes were identified, it was possible to speculate on the putative origin (Criollo or Forastero) of favorable QTL alleles segregating in both Trinitario studied.Key words: Theobroma cacao, bean traits, quantitative trait loci (QTL).

Theobroma cacao L.: a genetic linkage map and quantitative trait loci analysis

1996 ◽  
Vol 93-93 (1-2) ◽  
pp. 205-214 ◽  
Author(s):  
D. Crouzillat ◽  
E. Lerceteau ◽  
V. Petiard ◽  
J. Morera ◽  
H. Rodriguez ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Trait Loci ◽  
Theobroma Cacao L

scholarly journals Mapping of Quantitative Trait Loci for Butter Content and Hardness in Cocoa Beans (Theobroma cacao L.)

2008 ◽  
Vol 27 (2) ◽  
pp. 177-183 ◽  
Author(s):  
Ioná S. Araújo ◽  
Gonçalo A. de Souza Filho ◽  
Messias G. Pereira ◽  
Fábio G. Faleiro ◽  
Vagner T. de Queiroz ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Theobroma Cacao ◽  
Cocoa Beans ◽  
Trait Loci ◽  
Theobroma Cacao L

Genes and Quantitative Trait Loci Mapping for Major Agronomic Traits in Brassica napus L.

2018 ◽  
pp. 41-85 ◽  
Author(s):  
Régine Delourme ◽  
Anne Laperche ◽  
Anne-Sophie Bouchet ◽  
Mélanie Jubault ◽  
Sophie Paillard ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Quantitative Trait Loci Mapping ◽  
Brassica Napus L ◽  
Trait Loci

scholarly journals Wheat genetic resources – how to exploit?

2011 ◽  
Vol 47 (Special Issue) ◽  
pp. S43-S48 ◽  
Author(s):  
A. Börner ◽  
K. Neumann ◽  
B. Kobiljski
Keyword(s):  
Quantitative Trait Loci ◽  
Genetic Resources ◽  
Quantitative Trait ◽  
Molecular Mapping ◽  
Agronomic Traits ◽  
Wide Spectrum ◽  
Plant Genetic Resources ◽  
Germplasm Collections ◽  
Food And Agriculture ◽  
Trait Loci

It is estimated that world-wide existing germplasm collections contain about 7.5 million accessions of plant genetic resources for food and agriculture. Wheat (Triticum and Aegilops) represents the biggest group comprising 900 000 accessions. However, such a huge number of accessions is hindering a successful exploitation of the germplasm. The creation of core collections representing a wide spectrum of the genetic variation of the whole assembly may help to overcome the problem. Here we demonstrate the successful utilisation of such a core collection for the identification and molecular mapping of genes (Quantitative Trait Loci) determining the agronomic traits flowering time and grain yield, exploiting a marker-trait-association based technique. Significant marker-trait associations were obtained and are presented. The intrachromosomal location of many of these associations coincided with those of already identified major genes or quantitative trait loci, but others were detected in regions where no known genes have been located to date.

Genetics of Soybean Agronomic Traits: II. Interactions between Yield Quantitative Trait Loci in Soybean

Crop Science ◽  
1999 ◽  
Vol 39 (6) ◽  
pp. 1652-1657 ◽  
Author(s):  
J. H. Orf ◽  
K. Chase ◽  
F. R. Adler ◽  
L. M. Mansur ◽  
K. G. Lark
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Trait Loci

scholarly journals Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions

2013 ◽  
Vol 33 (2) ◽  
pp. 249-265 ◽  
Author(s):  
Elsayed Mansour ◽  
Ana M. Casas ◽  
M. Pilar Gracia ◽  
José Luis Molina-Cano ◽  
Marian Moralejo ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Trait Loci ◽  
Barley Population ◽  
Mediterranean Conditions
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