| Title |
Genetic dissection of early-season cold tolerance in sorghum: genome-wide association studies for seedling emergence and survival under field and controlled environment conditions
|
|---|---|
| Published in |
Theoretical and Applied Genetics, November 2017
|
| DOI | 10.1007/s00122-017-3021-2 |
| Pubmed ID | |
| Authors |
Sebastian Parra-Londono, Karin Fiedler, Mareike Kavka, Birgit Samans, Silke Wieckhorst, Arndt Zacharias, Ralf Uptmoor |
| Abstract |
A QTL on sorghum chromosome SBI-06 putatively improves field emergence under low-temperature conditions. Low temperatures decisively limit seedling emergence and vigor during early growth of sorghum and, thus, strongly impair geographical expansion. To broaden sorghum cultivation to temperate regions, the establishment of cold-tolerant genotypes is a prioritized breeding goal. The present study aims at the quantification of seedling emergence and survival under chilling temperatures and the detection of marker-trait associations controlling temperature-related seedling establishment. A diversity set consisting of 194 biomass sorghum lines was subjected to extensive phenotyping comprising field trials and controlled environment experiments. The final emergence percentage (FEP) under field conditions was significantly reduced under cold stress. Broad-sense heritability was h 2 = 0.87 for FEP in the field and h 2 = 0.93 for seedling survival rate (SR) under controlled conditions. Correlations between FEP in the field and under controlled conditions were low; higher correlations were observed between field FEP and SR in controlled environments. Genome-wide association studies (GWAS) were conducted using 44,515 single nucleotide polymorphisms (SNPs) and revealed eight regions with suggestive marker-trait associations for FEP and SR on chromosomes SBI-01, -02, -03, -06, -09, and -10 (p < 5.7 × 10-5) and a significant association on SBI-06 for field FEP (p < 2.9 × 10-6). Although not significant under controlled conditions, SR of genotypes carrying the minor allele on the field FEP quantitative trait loci (QTL) on SBI-06 was on average 13.1% higher, while FEP under controlled conditions was on average 9.7% higher with a linearly decreasing effect with increasing temperatures (R 2 = 0.82). Promising candidate genes putatively conferring seedling cold tolerance were identified. |
X Demographics
The data shown below were collected from the profiles of 11 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Australia | 2 | 18% |
| United States | 2 | 18% |
| United Kingdom | 1 | 9% |
| Thailand | 1 | 9% |
| Germany | 1 | 9% |
| Unknown | 4 | 36% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 8 | 73% |
| Scientists | 3 | 27% |
Mendeley readers
The data shown below were compiled from readership statistics for 40 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 40 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 10 | 25% |
| Student > Doctoral Student | 5 | 13% |
| Researcher | 5 | 13% |
| Other | 3 | 8% |
| Student > Bachelor | 2 | 5% |
| Other | 6 | 15% |
| Unknown | 9 | 23% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 23 | 57% |
| Biochemistry, Genetics and Molecular Biology | 5 | 13% |
| Environmental Science | 1 | 3% |
| Business, Management and Accounting | 1 | 3% |
| Earth and Planetary Sciences | 1 | 3% |
| Other | 0 | 0% |
| Unknown | 9 | 23% |
Attention Score in Context
This research output has an Altmetric Attention Score of 7. 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 14 July 2018.
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#4,760,416
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Outputs from Theoretical and Applied Genetics
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#74,804
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Outputs of similar age from Theoretical and Applied Genetics
#21
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