Assessment of Marker Based Genotype Diversity of Saltol QTL in Relation to Seedling Stage Salinity Tolerance in Selected Rice Genotypes

Dayasena, Y. A. P. K.; Udawela, U. A. K. S.; Ranaweera, L. T.

doi:10.4038/tar.v31i2.8362

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…In rice, corn and wheat, PCA is used for drought resistance analysis and evaluation, and relevant drought resistance indicators have been determined. PCA can explain and describe the important indicators of drought resistance and salt tolerance in germplasm (Bo et al, 2017;Negrão et al, 2017;Kakar et al, 2019). Ayalew et al (2011) identified three principal components through PCA, which accounted for 70% of the total variation in 14 agronomic traits.…”

Section: Discussionmentioning

confidence: 99%

Screening of Key Drought Tolerance Indices for Cotton at the Flowering and Boll Setting Stage Using the Dimension Reduction Method

et al. 2021

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Drought is one of the main abiotic stresses that seriously influences cotton production. Many indicators can be used to evaluate cotton drought tolerance, but the key indicators remain to be determined. The objective of this study was to identify effective cotton drought tolerance indicators from 19 indices, including morphology, photosynthesis, physiology, and yield-related indices, and to evaluate the yield potential of 104 cotton varieties under both normal and drought-stress field conditions. Combined with principal component analysis (PCA) and a regression analysis method, the results showed that the top five PCs among the 19, with eigenvalues > 1, contributed 65.52, 63.59, and 65.90% of the total variability during 2016 to 2018, respectively, which included plant height (PH), effective fruit branch number (EFBN), single boll weight (SBW), transpiration rate (Tr) and chlorophyll (Chl). Therefore, the indicator dimension decreased from 19 to 5. A comparison of the 19 indicators with the 5 identified indicators through PCA and a combined regression analysis found that the results of the final cluster of drought tolerance on 104 cotton varieties were basically consistent. The results indicated that these five traits could be used in combination to screen cotton varieties or lines for drought tolerance in cotton breeding programs, and Zhong R2016 and Xin lu zao 45 exhibited high drought tolerance and can be selected as superior parents for good yield performance under drought stress.

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Section: Discussionmentioning

confidence: 99%

Screening of Key Drought Tolerance Indices for Cotton at the Flowering and Boll Setting Stage Using the Dimension Reduction Method

et al. 2021

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“…Out of these, RM3412 and AP3206 were found to be tightly linked markers, whereas G11A and RM493 were useful as recombinant markers. A study on screening of six polymorphic SSR markers (closely linked to Saltol QTL) resulted in the identification of RM10843 with the highest allelic number whereas, RM140 and RM10748 were identified with the lowest allelic number, and the polymorphism information content (PIC) ranged from 0.1780 for RM10748 to 0.7659 for other marker alleles [ 53 ]. PIC is often used as a tool to detect polymorphisms, and has been used in selecting markers for genetic studies.…”

Section: Qtls Discovery Using Molecular Markersmentioning

confidence: 99%

Unlocking Allelic Diversity for Sustainable Development of Salinity Stress Tolerance in Rice

Raghuvanshi

Srivastava

Verulkar

et al. 2021

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: Rice is a major cereal crop which is negatively impacted by soil-salinity, both in terms of plant growth as well as productivity. Salinity tolerant rice varieties have been developed using conventional breeding approaches, however there has been limited success which is primarily due to the complexity of the trait, low yield, variable salt stress response and good genetic resources. Furthermore, the narrow genetic base is a hindrance for further improvement of the rice varieties. Therefore, there is a greater need to screen available donor germplasm in rice for salinity tolerance related genes and traits. In this regard, genomics based techniques are useful for exploring new gene resources and QTLs. In rice, the vast allelic diversity existing in the wild and cultivated germplasm needs to be explored for improving salt tolerance. In the present review, we provide an overview of the allelic diversity in the quantitative trait loci (QTLs) like Saltol, qGR6.2, qSE3 and RNC4 as well as genes like OsHKT1;1, SKC1 (OsHKT1;5/HKT8) and OsSTL1 (salt tolerance level 1 gene) related to salt tolerance in rice. We have also discussed approaches for developing salt-tolerant cultivars by utilizing the effective QTLs or genes/alleles in rice.

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Assessment of Marker Based Genotype Diversity of Saltol QTL in Relation to Seedling Stage Salinity Tolerance in Selected Rice Genotypes

Cited by 2 publications

References 15 publications

Screening of Key Drought Tolerance Indices for Cotton at the Flowering and Boll Setting Stage Using the Dimension Reduction Method

Screening of Key Drought Tolerance Indices for Cotton at the Flowering and Boll Setting Stage Using the Dimension Reduction Method

Unlocking Allelic Diversity for Sustainable Development of Salinity Stress Tolerance in Rice

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