12 research outputs found
Additional file 2: of Decreased photosynthetic rate under high temperature in wheat is due to lipid desaturation, oxidation, acylation, and damage of organelles
Figure S2. Relationship between (a) PC(36:6) lipid species levels with grain yield plant− 1 and (b) MGDG(36:4) lipid species levels with grain yield plant− 1. (DOCX 222 kb
Additional file 1: of Decreased photosynthetic rate under high temperature in wheat is due to lipid desaturation, oxidation, acylation, and damage of organelles
Figure S1. Effect of high temperature stress on galactose acylation of MGDG species in wheat. Sampling was on day 10 of the treatment. No analysis was performed to indicate the specific positions of the individual acyl chains in the acylated MGDG, which has the usual glycerol-linked fatty acids, plus an additional chain esterified to the galactose [100]. (DOCX 263 kb
Additional file 1: Table S1. of Population genomics of pearl millet (Pennisetum glaucum (L.) R. Br.): Comparative analysis of global accessions and Senegalese landraces
The germplasm used in this study. (XLSX 46 kb
Evaluation of 19,460 Wheat Accessions Conserved in the Indian National Genebank to Identify New Sources of Resistance to Rust and Spot Blotch Diseases
<div><p>A comprehensive germplasm evaluation study of wheat accessions conserved in the Indian National Genebank was conducted to identify sources of rust and spot blotch resistance. Genebank accessions comprising three species of wheat–<i>Triticum aestivum</i>, <i>T</i>. <i>durum</i> and <i>T</i>. <i>dicoccum</i> were screened sequentially at multiple disease hotspots, during the 2011–14 crop seasons, carrying only resistant accessions to the next step of evaluation. Wheat accessions which were found to be resistant in the field were then assayed for seedling resistance and profiled using molecular markers. In the primary evaluation, 19,460 accessions were screened at Wellington (Tamil Nadu), a hotspot for wheat rusts. We identified 4925 accessions to be resistant and these were further evaluated at Gurdaspur (Punjab), a hotspot for stripe rust and at Cooch Behar (West Bengal), a hotspot for spot blotch. The second round evaluation identified 498 accessions potentially resistant to multiple rusts and 868 accessions potentially resistant to spot blotch. Evaluation of rust resistant accessions for seedling resistance against seven virulent pathotypes of three rusts under artificial epiphytotic conditions identified 137 accessions potentially resistant to multiple rusts. Molecular analysis to identify different combinations of genetic loci imparting resistance to leaf rust, stem rust, stripe rust and spot blotch using linked molecular markers, identified 45 wheat accessions containing known resistance genes against all three rusts as well as a QTL for spot blotch resistance. The resistant germplasm accessions, particularly against stripe rust, identified in this study can be excellent potential candidates to be employed for breeding resistance into the background of high yielding wheat cultivars through conventional or molecular breeding approaches, and are expected to contribute toward food security at national and global levels.</p></div
Seedling resistance in wheat accessions.
<p>These genebank accessions were identified as resistant in the primary field evaluation at the hotspots. The seedling resistance was recorded as resistant either to only one rust disease (leaf, stem or stripe) or a combination of two or all the three rust diseases. Seedling resistance screening was carried out under controlled condition at the Regional Station of Indian Institute of Wheat and Barley Research (IIWBR), Flowerdale, Shimla. Accession-wise details are provided in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0167702#pone.0167702.s003" target="_blank">S3 Table</a>.</p
Diversity among rust resistant genotypes based on profiles of linked molecular markers.
<p>Diversity among rust resistant genotypes based on profiles of linked molecular markers.</p
Amplicon profile of 137 wheat accessions for SSR marker G<i>wm427</i> linked to <i>Sr13</i>. M = 100bp ladder.
<p>Amplicon profile of 137 wheat accessions for SSR marker G<i>wm427</i> linked to <i>Sr13</i>. M = 100bp ladder.</p
Gene combinations present in 137 wheat accessions.
<p>These wheat accessions were screened for the amplification of markers linked to five <i>Lr</i> genes, three <i>Sr</i> genes, four <i>Yr</i> genes and one spot blotch resistance QTL. Disease reaction recorded at Gurdaspur for yellow rust and at Cooch Behar for spot blotch are also given. R- resistant; MR- Moderately resistant; MS- moderately susceptible, S- susceptible and #N/A—no data.</p
Locations of evaluation experiments of wheat germplasm against rusts and spot blotch.
<p>Primary screening against the three rusts was carried out at Wellington. Subsequent screening for stripe rust resistance was done at Gurdaspur and for spot blotch resistance at Cooch Behar. The seedling resistance assay was carried out at Flowerdale and molecular profiling was done at New Delhi. Base map was generated using DIVA-GIS data (<a href="http://www.diva-gis.org/gdata" target="_blank">www.diva-gis.org/gdata</a>).</p
Results of primary screening of wheat germplasm against three rusts.
<p>Stem: Stem rust; Leaf: Leaf rust; Stripe: Stripe rust S: Susceptible; MS: Moderately susceptible; MR: Moderately resistant; R: Resistant.</p