Genotype selection for physiological responses of drought tolerance using molecular markers in polycross hybrids of orchardgrass

2019 ◽  
Vol 138 (6) ◽  
pp. 937-946
Author(s):  
Mozhgan Abtahi ◽  
Mohammad Mahdi Majidi ◽  
Aghafakhr Mirlohi
Keyword(s):  
Molecular Markers ◽  
Drought Tolerance ◽  
Physiological Responses ◽  
Selection For

scholarly journals Analysis of Natural Variation in Bermudagrass (Cynodon dactylon) Reveals Physiological Responses Underlying Drought Tolerance

PLoS ONE ◽  
2012 ◽  
Vol 7 (12) ◽  
pp. e53422 ◽  
Author(s):  
Haitao Shi ◽  
Yanping Wang ◽  
Zhangmin Cheng ◽  
Tiantian Ye ◽  
Zhulong Chan
Keyword(s):  
Drought Tolerance ◽  
Natural Variation ◽  
Cynodon Dactylon ◽  
Physiological Responses

scholarly journals Physiological Responses under Drought Stress of Improved Drought-Tolerant Rice Lines and their Parents

2018 ◽  
Vol 46 (2) ◽  
pp. 679-687 ◽  
Author(s):  
Preeyanuch LARKUNTHOD ◽  
Noppawan NOUNJAN ◽  
Jonaliza L SIANGLIW ◽  
Theerayut TOOJINDA ◽  
Jirawat SANITCHON ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Water Status ◽  
Physiological Responses ◽  
High Water ◽  
Recurrent Parent ◽  
Potential Candidate ◽  
Substitution Lines ◽  
Chromosome Segment Substitution Lines ◽  
Drought Tolerant

Many of the economically important rice cultivars including ‘Khao Dawk Mali 105’ (KDML105) or jasmine rice, one of the world’s famous rice exported from Thailand suffers from drought due to erratic rainfalls and limited irrigation. To improve drought tolerance and reserve genetic background of KDML105, chromosome segment substitution lines (CSSL) containing drought tolerant quantitative trait loci (DT-QTL) has been previously developed by backcrossing between KDML105 and drought tolerant donor, IR58586-F2-CA-143 (DH212). To understand the physiological responses related to drought tolerance in CSSL lines compared to parents, two CSSLs namely CSSL1-16 and CSSL1-18, respectively were used in this study. Twenty-one-d-old hydroponically grown plants were subjected to 20% PEG for 0, 7, 14 d and then recovered from stress for 3 d. The results indicated that CSSL lines especially, CSSL1-16 showed better performance under drought stress compared to their recurrent parent. Drought tolerance superior CSSL1-16 line was indicated by high water status (high relative water content and leaf water potential), good osmotic adjustment, high proline and greater membrane stability. Moreover, this line was able to resume growth after stress recovery whereas other lines/cultivar could not recover. Similarly, drought tolerant donor showed high water status suggesting that well-maintained plant water status was associated with drought tolerant trait. It could be concluded that the highest drought tolerant line was CSSL1-16 followed by DH212, CSSL1-18 and KDML105. It would be interesting to go further into introgressed section in CSSL1-16 to identify potential candidate genes in DT-QTL for breeding drought tolerant rice in the future.

Identifying traits and molecular markers associated with components of drought tolerance in rice

2008 ◽  
pp. 282-283
Author(s):  
H. E. Shashidhar ◽  
N. Sharma ◽  
M. Ashoka ◽  
V. Rao ◽  
M. Toorchi ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Drought Tolerance

scholarly journals Genomic Selection for Drought Tolerance Using Genome-Wide SNPs in Maize

2017 ◽  
Vol 8 ◽  
Author(s):  
Mittal Shikha ◽  
Arora Kanika ◽  
Atmakuri Ramakrishna Rao ◽  
Mallana Gowdra Mallikarjuna ◽  
Hari Shanker Gupta ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Genomic Selection ◽  
Genome Wide ◽  
Selection For

scholarly journals The interplay between miR156/SPL13 and DFR/WD40–1 regulate drought tolerance in alfalfa

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Biruk A. Feyissa ◽  
Muhammad Arshad ◽  
Margaret Y. Gruber ◽  
Susanne E. Kohalmi ◽  
Abdelali Hannoufa
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Anthocyanin Biosynthesis ◽  
Physiological Responses ◽  
Biological Functions ◽  
Altered Expression ◽  
Transcript Levels ◽  
Squamosa Promoter Binding Protein ◽  
Fine Tune

Abstract Background Developing Medicago sativa L. (alfalfa) cultivars tolerant to drought is critical for the crop’s sustainable production. miR156 regulates various plant biological functions by silencing SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL) transcription factors. Results To understand the mechanism of miR156-modulated drought stress tolerance in alfalfa we used genotypes with altered expression levels of miR156, miR156-regulated SPL13, and DIHYDROFLAVONOL-4-REDUCTASE (DFR) regulating WD40–1. Previously we reported the involvement of miR156 in drought tolerance, but the mechanism and downstream genes involved in this process were not fully studied. Here we illustrate the interplay between miR156/SPL13 and WD40–1/DFR to regulate drought stress by coordinating gene expression with metabolite and physiological strategies. Low to moderate levels of miR156 overexpression suppressed SPL13 and increased WD40–1 to fine-tune DFR expression for enhanced anthocyanin biosynthesis. This, in combination with other accumulated stress mitigating metabolites and physiological responses, improved drought tolerance. We also demonstrated that SPL13 binds in vivo to the DFR promoter to regulate its expression. Conclusions Taken together, our results reveal that moderate relative miR156 transcript levels are sufficient to enhance drought resilience in alfalfa by silencing SPL13 and increasing WD40–1 expression, whereas higher miR156 overexpression results in drought susceptibility.

Soybean seed lustre phenotype and surface protein cosegregate and map to linkage group E

Genome ◽  
2003 ◽  
Vol 46 (4) ◽  
pp. 659-664 ◽  
Author(s):  
Mark Gijzen ◽  
Changren Weng ◽  
Kuflom Kuflu ◽  
Lorna Woodrow ◽  
Kangfu Yu ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Linkage Group ◽  
Soybean Seed ◽  
Protein Composition ◽  
Surface Protein ◽  
Hydrophobic Protein ◽  
Seed Surface ◽  
New Methods ◽  
Glycine Max L ◽  
Selection For

Soybean (Glycine max (L.) Merr.) seeds vary in their surface properties. The lustre, or glossiness, of seeds has been classified into several different phenotypes. Soybean seeds that have a dull lustre or moderate bloom (B) may also have abundant seed surface protein, namely, an abundance of the hydrophobic protein from soybean (HPS). The seed surface protein HPS is an allergen (Gly m 1) that causes asthma in persons allergic to soybean dust. In this study, seed lustre and surface protein content are compared among 71 different soybean cultivars and lines. Dull-seeded phenotypes usually possessed abundant surface protein in comparison to shiny-seeded types, although exceptions were observed. An F2 population of 82 individuals from a cross of OX281 (dull lustre, abundant HPS) and Mukden (shiny lustre, trace amounts of HPS) provided a basis for inheritance studies and genetic mapping analysis. Results indicate that dull seed lustre (B) and surface protein (Hps) loci are dominant Mendelian traits that cosegregate and map to soybean linkage group E. Molecular markers were used to construct a genetic map of 28 cM encompassing B and Hps. Two different molecular markers cosegregated with each of the loci. This study provides additional evidence that Hps may play a role in the adhesion of endocarp tissues to the seed, and offers new methods of selection for seed lustre and surface protein composition in soybean.Key words: adhesion, allergen, hydrophobic protein, pericarp, seed coat.

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