scholarly journals Seed Number and 100-Seed Weight of Pearl Millet (Pennisetum glaucum L.) Respond Differently to Low Soil Moisture in Genotypes Contrasting for Drought Tolerance

2013 ◽  
Vol 200 (2) ◽  
pp. 119-131 ◽  
Author(s):  
K. Aparna ◽  
C. T. Hash ◽  
R. S. Yadav ◽  
V. Vadez
Keyword(s):  
Soil Moisture ◽  
Drought Tolerance ◽  
Pearl Millet ◽  
Seed Weight ◽  
Pennisetum Glaucum ◽  
Seed Number ◽  
100 Seed Weight

Morpho-physiological and Molecular Characterization of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Germplam Lines for Drought Tolerance

2021 ◽  
pp. 39-60
Author(s):  
M. L. Choudhary ◽  
M. K. Tripathi ◽  
Sushma Tiwari ◽  
R. K. Pandya ◽  
Neha Gupta ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Molecular Characterization ◽  
Pearl Millet ◽  
Pennisetum Glaucum

scholarly journals Constitutive water-conserving mechanisms are correlated with the terminal drought tolerance of pearl millet [Pennisetum glaucum (L.) R. Br.]

2009 ◽  
Vol 61 (2) ◽  
pp. 369-377 ◽  
Author(s):  
Jana Kholová ◽  
C. Tom Hash ◽  
Aparna Kakkera ◽  
Marie Kočová ◽  
Vincent Vadez
Keyword(s):  
Drought Tolerance ◽  
Pearl Millet ◽  
Pennisetum Glaucum ◽  
Terminal Drought

scholarly journals Genetic Mapping for Agronomic Traits in IAPAR 81/LP97-28 Population of Common Bean (Phaseolus vulgaris L.) under Drought Conditions

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1568
Author(s):  
Júlio César Ferreira Elias ◽  
Maria Celeste Gonçalves-Vidigal ◽  
Mariana Vaz Vaz Bisneta ◽  
Giseli Valentini ◽  
Pedro Soares Vidigal Filho ◽  
...  
Keyword(s):  
Drought Stress ◽  
Quantitative Trait Loci ◽  
Drought Tolerance ◽  
Common Bean ◽  
Seed Yield ◽  
Quantitative Trait ◽  
Seed Weight ◽  
Drought Conditions ◽  
Days To Maturity ◽  
100 Seed Weight

One of the significant challenges of common bean breeding is developing cultivars with high yields under drought conditions. The present study attempted to map quantitative trait loci (QTLs) and identify molecular markers that are linked to drought tolerance in the common bean. We evaluated 160 recombinant inbred lines (RILs), derived from the cross between the carioca cultivars IAPAR 81 (drought tolerant) and LP97-28 (susceptible to drought). In 2014 and 2015, two experiments were conducted (DS—drought stress, and NS—no drought stress). In the DS experiment, water suppression was performed at the flowering stages R5 to R6. The results of our experiments showed that drought conditions play an essential role in reducing most of the traits that were evaluated. RILs under drought conditions reduced the grain yield by 62.03% and 24% in 2014 and 2015, respectively. We identified 15 quantitative trait loci distributed on the chromosomes Pv01, Pv02, Pv03, Pv07, Pv08, Pv09, Pv10, and Pv11, related to grain yield, seed yield per day, 100-seed weight, number of pods per plant, plant height, number of days for flowering, and number of days to maturity. The characteristics of seed yield per day, 100-seed weight, and number of days to maturity showed that QTLs colocalized on Pv07. Identifying QTLs that are linked to drought tolerance in the RIL population IAPAR 81 × LP97-28 is of particular importance for common bean breeding programs seeking to improve carioca beans that are cultivated in regions with drought conditions, such as Brazil.

scholarly journals Loci discovery, network-guided approach, and genomic prediction for drought tolerance index in a multi-parent advanced generation intercross (MAGIC) cowpea population

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Waltram Ravelombola ◽  
Ainong Shi ◽  
Bao-Lam Huynh
Keyword(s):  
Drought Tolerance ◽  
Seed Weight ◽  
Growth Habit ◽  
Tolerance Index ◽  
Plant Growth Habit ◽  
Drought Tolerance Index ◽  
Drought Tolerance Indices ◽  
Tolerance Indices ◽  
Advanced Generation ◽  
100 Seed Weight

AbstractCowpea is a nutrient-dense legume that significantly contributes to the population’s diet in sub-Saharan Africa and other regions of the world. Improving cowpea cultivars to be more resilient to abiotic stress such as drought would be of great importance. The use of a multi-parent advanced generation intercross (MAGIC) population has been shown to be efficient in increasing the frequency of rare alleles that could be associated with important agricultural traits. In addition, drought tolerance index has been reported to be a reliable parameter for assessing crop tolerance to water-deficit conditions. Therefore, the objectives of this study were to evaluate the drought tolerance index for plant growth habit, plant maturity, flowering time, 100-seed weight, and grain yield in a MAGIC cowpea population, to conduct genome-wide association study (GWAS) and identify single nucleotide polymorphism (SNP) markers associated with the drought tolerance indices, to investigate the potential relationship existing between the significant loci associated with the drought tolerance indices, and to conduct genomic selection (GS). These analyses were performed using the existing phenotypic and genotypic data published for the MAGIC population which consisted of 305 F8 recombinant inbred lines (RILs) developed at University of California, Riverside. The results indicated that: (1) large variation in drought tolerance indices existed among the cowpea genotypes, (2) a total of 14, 18, 5, 5, and 35 SNPs were associated with plant growth habit change due to drought stress, and drought tolerance indices for maturity, flowering time, 100-seed weight, and grain yield, respectively, (3) the network-guided approach revealed clear interactions between the loci associated with the drought tolerance traits, and (4) the GS accuracy varied from low to moderate. These results could be applied to improve drought tolerance in cowpea through marker-assisted selection (MAS) and genomic selection (GS). To the best of our knowledge, this is the first report on marker loci associated with drought tolerance indices in cowpea.

scholarly journals Screening of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Germplam Lines for Drought Tolerance Based on Morpho-physiological Traits and SSR Markers

2021 ◽  
pp. 46-63
Author(s):  
M. L. Choudhary ◽  
M. K. Tripathi ◽  
Sushma Tiwari ◽  
R. K. Pandya ◽  
Neha Gupta ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Drought Tolerance ◽  
Microsatellite Markers ◽  
Pearl Millet ◽  
Ssr Markers ◽  
Pennisetum Glaucum ◽  
Physiological Traits ◽  
Physiological Data ◽  
Major Allele Frequency ◽  
Morphological And Physiological Traits

Aim: The present study was undertaken to analyze genetic diversity among pearl millet genotypes based on drought linked morpho-physiological and microsatellite markers. Study Design: In the present investigation, 96 pearl millet germplasm lines were screened against drought using different morphological and physiological traits along with SSR markers. Place and Duration of the Study: The present study was conducted at College of Agriculture, Gwalior, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior, M.P., India during July 2019 to December, 2020. Methodology: The study was conducted to record different morphological and physiological traits related to drought tolerance and susceptibility. Thirty five microsatellite markers were also used in laboratory to analyze the variability among pearl millet genotypes under study. Results: Pearl millet genotypes were grouped according to their morpho-physiological characteristics. Among 35 SSR markers, twenty-two were successfully amplified across all germplasm lines and seven SSR markers were found to be polymorphic and fifteen markers were monomorphic. All seven polymorphic SSR markers were used consequently for amplification of all the 96 germplasm lines. The range of PIC value was 0.0939 to 0.2980 with the average of 0.2274. The highest PIC value was recorded for the markers Xibmsp26 and Xibmsp29 (0.2980), followed by Xibmsp03 (0.2392), Xibmsp29 (0.2392), Xibmsp06 (0.2289) and Xibmsp07 (0.1948) while the lowest for the marker Xibmsp01 (0.0939). The range of major allele frequency value was 0.7604 to 0.9479 with the average of 0.8363. The range of genetic diversity value was 0.0987 to 0.3644 with the average of 0.2665. Conclusions: According to the morpho-physiological data a total of 22 pearl millet genotypes were found to be grouped distantly from rest of the genotypes. These genotypes had shown their drought tolerance bahaviour however, rests of the genotypes were found to be susceptible against drought.

scholarly journals Screening of Pearl Millet Genotypes Suitable for Drought Tolerance at Early Seedling Stage

2021 ◽  
Author(s):  
R.C. Meena ◽  
Supriya Ambawat ◽  
C. Tara Satyavathi ◽  
Moola Ram ◽  
Vikas Khandelwal ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Tolerance ◽  
Pearl Millet ◽  
Pennisetum Glaucum ◽  
Climatic Factors ◽  
Crop Improvement ◽  
Seedling Stage ◽  
Drought Tolerant ◽  
Early Seedling ◽  
Improvement Programs

Background: Pearl millet [Pennisetum glaucum (L.) Br.] is the most widely grown staple food of majority of poor and small land holders in Asia and Africa. It is also consumed as feed and fodder for livestock. It is the sixth most important cereal crop in the world next to maize, rice wheat, barley and sorghum. The temperature is one of the key climatic factors and has profound effect on the growth and development of the pearl millet. It can only be managed through developing hybrid varieties which can tolerate high temperature during germination and early seedling stages.The present study aimed to identify drought tolerant genotypes of pearl millet at seedling stage. Methods: This experiment was carried out at Mandor during kharif 2018 with five selected pearl millet advanced hybrids MH 2192, MH 2224, MH 2228, MH 2354 and MH 2359 along with three checks RHB 177, MPMH 17 and 86M86 which were tested under polyethylene glycol (PEG) (5% and 10%) induced osmotic stress. Various physiological parameters were recorded 15 days after sowing and statistical analysis made using Windostat software. Result: The results revealed that shoot length, seedling dry weight, relative water content, membrane stability index and chlorophyll content decreased significantly with PEG induced water stress in all the hybrids while root length and catalase activity increased significantly under water stress. Among 5 hybrids, two hybrids viz. MH 2359 and MH 2354 performed better and found to be superior under PEG induced water stress. Thus, various drought tolerance indices may further be studied for these two hybrids and can be used in development of drought tolerant genotypes which may prove helpful for crop improvement programs of pearl millet.

scholarly journals Research on the Drought Tolerance Mechanism of Pennisetum Glaucum (L.) in the Root During Seedling

2020 ◽  
Author(s):  
Ailing Zhang ◽  
Yang Ji ◽  
Min Sun ◽  
Chuang Lin ◽  
Puding Zhou ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Drought Tolerance ◽  
Pearl Millet ◽  
Drought Resistance ◽  
Pennisetum Glaucum ◽  
Signal Transduction Pathway ◽  
Mapk Signaling ◽  
Limiting Factors ◽  
Suitable Material ◽  
Differently Expressed Genes

Abstract BackgroundDrought, being as one of the major environmental limiting factors, leads a huge reduction in crop growth rate and biomass accumulation. Pearl millet is a suitable material to study drought resistance due to its excellent drought tolerance. Root is a very important part of plant playing crucial roles in plant growth and development, which makes it a target to research on.ResultsIn this study, we tried to find the mechanism of drought tolerance of pearl millet by comparing the data of physiology and transcriptome under normal and drought conditions at 3 time points (1 hour, 3 hours and 7 hours) in root at seedling stage. The relative electrical conductivity went up from 1hour to 7 hours in both control and drought stress groups and the content of malondialdehyde showed a decreasing trend. 2004, 1538 and 605 differently expressed genes were found at 1hour, 3 hours and 7 hours respectively. Some of these differently expressed genes were clustered significantly into ‘metabolic processes’, ‘MAPK signaling pathway’ and ‘plant hormone signal transduction’ like ABA signal transduction pathway in GO and KEGG enrichment analysis.ConclusionsPearl millet was found to have a rapid drought response, which may occur before 1 hour contributing to its drought tolerance. These results can provide a theoretical basis to enhance drought resistance in other plants.

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