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Genome-wide association mapping of quantitative traits in a breeding population of sugarcane

Overview of attention for article published in BMC Plant Biology, June 2016
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Title
Genome-wide association mapping of quantitative traits in a breeding population of sugarcane
Published in
BMC Plant Biology, June 2016
DOI 10.1186/s12870-016-0829-x
Pubmed ID
Authors

Josefina Racedo, Lucía Gutiérrez, María Francisca Perera, Santiago Ostengo, Esteban Mariano Pardo, María Inés Cuenya, Bjorn Welin, Atilio Pedro Castagnaro

Abstract

Molecular markers associated with relevant agronomic traits could significantly reduce the time and cost involved in developing new sugarcane varieties. Previous sugarcane genome-wide association analyses (GWAS) have found few molecular markers associated with relevant traits at plant-cane stage. The aim of this study was to establish an appropriate GWAS to find molecular markers associated with yield related traits consistent across harvesting seasons in a breeding population. Sugarcane clones were genotyped with DArT (Diversity Array Technology) and TRAP (Target Region Amplified Polymorphism) markers, and evaluated for cane yield (CY) and sugar content (SC) at two locations during three successive crop cycles. GWAS mapping was applied within a novel mixed-model framework accounting for population structure with Principal Component Analysis scores as random component. A total of 43 markers significantly associated with CY in plant-cane, 42 in first ratoon, and 41 in second ratoon were detected. Out of these markers, 20 were associated with CY in 2 years. Additionally, 38 significant associations for SC were detected in plant-cane, 34 in first ratoon, and 47 in second ratoon. For SC, one marker-trait association was found significant for the 3 years of the study, while twelve markers presented association for 2 years. In the multi-QTL model several markers with large allelic substitution effect were found. Sequences of four DArT markers showed high similitude and e-value with coding sequences of Sorghum bicolor, confirming the high gene microlinearity between sorghum and sugarcane. In contrast with other sugarcane GWAS studies reported earlier, the novel methodology to analyze multi-QTLs through successive crop cycles used in the present study allowed us to find several markers associated with relevant traits. Combining existing phenotypic trial data and genotypic DArT and TRAP marker characterizations within a GWAS approach including population structure as random covariates may prove to be highly successful. Moreover, sequences of DArT marker associated with the traits of interest were aligned in chromosomal regions where sorghum QTLs has previously been reported. This approach could be a valuable tool to assist the improvement of sugarcane and better supply sugarcane demand that has been projected for the upcoming decades.

Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 113 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 2%
France 1 <1%
Unknown 110 97%

Demographic breakdown

Readers by professional status Count As %
Researcher 23 20%
Student > Ph. D. Student 21 19%
Student > Doctoral Student 13 12%
Student > Master 13 12%
Student > Postgraduate 5 4%
Other 10 9%
Unknown 28 25%
Readers by discipline Count As %
Agricultural and Biological Sciences 59 52%
Biochemistry, Genetics and Molecular Biology 13 12%
Unspecified 2 2%
Business, Management and Accounting 1 <1%
Sports and Recreations 1 <1%
Other 2 2%
Unknown 35 31%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 03 July 2016.
All research outputs
#20,335,423
of 22,880,230 outputs
Outputs from BMC Plant Biology
#2,529
of 3,264 outputs
Outputs of similar age
#305,335
of 352,733 outputs
Outputs of similar age from BMC Plant Biology
#43
of 56 outputs
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