Molecular mapping of quantitative trait loci for flag leaf length and other agronomic traits in rice(Oryza sativa)

2012 ◽  
Vol 40 (3) ◽  
pp. 362-372 ◽  
Author(s):  
H. Sonah ◽  
R. Deshmukh ◽  
S. Chand ◽  
M. Srinivasprasad ◽  
G. Rao ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Molecular Mapping ◽  
Agronomic Traits ◽  
Flag Leaf ◽  
Leaf Length ◽  
Trait Loci ◽  
Flag Leaf Length

scholarly journals Quantitative Trait Loci Affecting Flag Leaf Development in Rice (Oryza sativa L.)

2003 ◽  
Vol 53 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Sohei Kobayashi ◽  
Yoshimichi Fukuta ◽  
Satoshi Morita ◽  
Tadashi Sato ◽  
Mitsuru Osaki ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Leaf Development ◽  
Oryza Sativa L ◽  
Flag Leaf ◽  
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.

scholarly journals Identification of Quantitative Trait Loci Relating to Flowering Time, Flag Leaf and Awn Characteristics in a Novel Triticum dicoccum Mapping Population

Plants ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 829
Author(s):  
Tally I.C. Wright ◽  
Angela C. Burnett ◽  
Howard Griffiths ◽  
Maxime Kadner ◽  
James S. Powell ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Quantitative Trait Loci ◽  
Flowering Time ◽  
Quantitative Trait ◽  
Marker Assisted Selection ◽  
Mapping Population ◽  
Flag Leaf ◽  
Snp Array ◽  
Leaf Length ◽  
Trait Loci

Tetraploid landraces of wheat harbour genetic diversity that could be introgressed into modern bread wheat with the aid of marker-assisted selection to address the genetic diversity bottleneck in the breeding genepool. A novel bi-parental Triticum turgidum ssp. dicoccum Schrank mapping population was created from a cross between two landrace accessions differing for multiple physiological traits. The population was phenotyped for traits hypothesised to be proxies for characteristics associated with improved photosynthesis or drought tolerance, including flowering time, awn length, flag leaf length and width, and stomatal and trichome density. The mapping individuals and parents were genotyped with the 35K Wheat Breeders’ single nucleotide polymorphism (SNP) array. A genetic linkage map was constructed from 104 F4 individuals, consisting of 2066 SNPs with a total length of 3295 cM and an average spacing of 1.6 cM. Using the population, 10 quantitative trait loci (QTLs) for five traits were identified in two years of trials. Three consistent QTLs were identified over both trials for awn length, flowering time and flag leaf width, on chromosomes 4A, 7B and 5B, respectively. The awn length and flowering time QTLs correspond with the major loci Hd and Vrn-B3, respectively. The identified marker-trait associations could be developed for marker-assisted selection, to aid the introgression of diversity from a tetraploid source into modern wheat for potential physiological trait improvement.

Quantitative trait loci analysis of economically important traits in Sorghum bicolor × S. sudanense hybrid

2011 ◽  
Vol 91 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Lu Xiao-ping ◽  
Yun Jin-feng ◽  
Gao Cui-ping ◽  
Surya Acharya
Keyword(s):  
Quantitative Trait Loci ◽  
Sorghum Bicolor ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Random Amplified Polymorphic Dna ◽  
Female Parent ◽  
Leaf Length ◽  
Linkage Groups ◽  
Plant Weight ◽  
Trait Loci

Lu, X-p., Yun, J-f., Gao, C-p. and Acharya, S. 2011. Quantitative trait loci analysis of economically important traits in Sorghum bicolor×S. sudanense hybrid. Can. J. Plant Sci. 91: 81–90. Many agronomic traits of Sorghum bicolor×S. sudanense hybrid are quantitatively inherited, and the gene mapping of these traits has important research and practical consequences. In this study, genetic mapping and quantitative trait loci (QTL) analyses were conducted using 248 F2:3 plants of a cross between sorghum 314A (female parent) and Sudan grass 2002GZ-1 (male parent). A total of 178 markers (170 amplified fragment length polymorphism and 8 random amplified polymorphic DNA) were employed to construct a linkage map with 10 linkage groups covering 836 cM of the genome. The two parents expressed polymorphism for 10 agronomic characters (plant height, stem diameter, leaf number, leaf length, leaf width, spike length, tiller number, ratio of stem and leaf weight, fresh plant weight and dry plant weight). When analyzed for possible QTLs a total of 98 QTLs were identified in two test sites, out of which 26 QTLs overlapped in both sites. The average number of QTLs per character was found to be 2.6 and the distributions of these QTLs were found to be uneven across linkage groups. This, and the fact that molecular marker densities were not proportional with QTL frequencies, indicates that the detectable QTLs correlated with the agronomic traits and the genetic map can be useful for improvement in relevant characters in Sorghum bicolor×S. sudanense hybrids.

scholarly journals Association mapping of quantitative trait loci for yield-related agronomic traits in rice (Oryza sativa L.)

2016 ◽  
Vol 15 (10) ◽  
pp. 2192-2202 ◽  
Author(s):  
Fei-fei XU ◽  
Liang JIN ◽  
Yan HUANG ◽  
Chuan TONG ◽  
Ya-ling CHEN ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Association Mapping ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Oryza Sativa L ◽  
Trait Loci

Molecular mapping of quantitative trait loci for zinc toxicity tolerance in rice seedling (Oryza sativa L.)

2006 ◽  
Vol 95 (2-3) ◽  
pp. 420-425 ◽  
Author(s):  
Yanjun Dong ◽  
Tsugufumi Ogawa ◽  
Dongzhi Lin ◽  
Hee-Jong Koh ◽  
Hiroshi Kamiunten ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Molecular Mapping ◽  
Oryza Sativa L ◽  
Rice Seedling ◽  
Zinc Toxicity ◽  
Trait Loci

scholarly journals Multiple Cold Tolerance Trait Phenotyping Reveals Shared Quantitative Trait Loci in Oryza sativa

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Naoki Shimoyama ◽  
Melineeh Johnson ◽  
André Beaumont ◽  
Michael Schläppi
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Cold Tolerance ◽  
Quantitative Trait ◽  
Trait Loci

Mapping of quantitative trait loci for gibberellic acid response at rice (Oryza sativa L.) seedling stage

Plant Science ◽  
2006 ◽  
Vol 170 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Yanjun Dong ◽  
H. Kamiuten ◽  
Zhongnan Yang ◽  
Dongzhi Lin ◽  
T. Ogawa ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Quantitative Trait Loci ◽  
Gibberellic Acid ◽  
Quantitative Trait ◽  
Oryza Sativa L ◽  
Seedling Stage ◽  
Trait Loci
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