Genetic variation for phosphorus-use efficiency in diverse wheat germplasm

Hari-Gowthem, Gunaseelen; Kaur, Satinder; Sekhon, B. S.; Sharma, Priti; Chhuneja, Parveen

doi:10.1080/15427528.2019.1627633

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…However, RIL RHL and RHD increased under LP conditions compared to under HP conditions in order to capture more Pi. The same type of mechanism has been reported in finger millet [17], all millets [16], foxtail millet [55,66], rice [67,68], and wheat [69]. The root is an essential plant organ that helps absorb nutrients and water from the soil.…”

Section: Discussionsupporting

confidence: 52%

Identification of QTL Associated with Agro-Morphological and Phosphorus Content Traits in Finger Millet under Differential Phosphorus Supply via Linkage Mapping

et al. 2023

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Finger millet (Eleusine coracana (L.) Gaertn.) is one of the most important cereal crops for people in Asia and Africa. It supplies energy and nutrients for all people, particularly poor people in these continents. Phosphorus (P) is an essential macronutrient for plant growth and grain quality, so an adequate amount of P is required for healthy plant life. There is considerable evidence that P deficiency affects the growths and yields of all cereals, including finger millet. The present study aimed at identifying the quantitative trait loci (QTL) for various agro-morphological and P-content traits under low P (LP) and high P (HP) conditions through linkage mapping. Two cultivars, IE-2606 (low-P-susceptible) and PR-202 (low-P-tolerant) were used to develop 100 recombinant inbred lines (RILs). In total, 55 QTL, associated with various agro-morphological (primary root length (PRL), shoot fresh weight (SFW), root fresh weight (RFW), shoot dry weight (SDW), root dry weight (RDW), and root hair density (RHD)) and P-content traits (inorganic phosphate content in shoots (PiS), inorganic phosphate content in roots (PiR), and total P content in shoots (TPS)) were detected under LP conditions. Similarly, 37 QTL for various agro-morphological (PRL, RFW, SDW, and root hair length (RHL)) and P-content traits (PiS, PiR, TPS, and total P content in roots (TPR)) were detected under HP conditions. Biotic and abiotic stress-responsive candidate genes linked to a few QTL were also identified. The identified QTL associated with agro-morphological and P-content traits in finger millet under P deficiency could be used in breeding programs to develop finger millet with better P use efficiency (PUE). Furthermore, improving finger millet growth and yield under LP soil will help to reduce Pi application and eutrophication, which may help to improve the lives of poor farmers and maintain sustainable environments in Asia and African countries.

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Section: Discussionsupporting

confidence: 52%

Identification of QTL Associated with Agro-Morphological and Phosphorus Content Traits in Finger Millet under Differential Phosphorus Supply via Linkage Mapping

et al. 2023

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“…The PUE of crops [23,24] will be enhanced by improvements in either PUPE or PUTE. In wheat [25], maize [26], brassica [27], rice [28], cowpea [29], mungbean [30][31], eld pea [32], soybean [33], sorghum [34], pearl millet [35], chickpea [36], and pigeonpea [37], there was a high genetic diversity in crops for PUE and its component traits.…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Effectiveness of the Classification for the Phosphorus Use Efficiency Traits at the Seedling Stage in Lentil

Rai

et al. 2020

Preprint

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Background: Understanding the morphology of the root system in lentils is critical for the identification of root characteristics for breeding cultivars with enhanced phosphorus use efficiency (PUE) to better adapt to poor P environments. PUE and variability in root morphological characteristics at the early vegetative stage were investigated among 40 indigenous and exotic lentil genotypes in a hydroponic phenotyping system.Results: A prerequisite for developing P-efficient crop cultivars is to categorise existing germplasm. In this experiment, 40 lentil genotypes were grown for 24 days under P deficit (3 μm KH2PO4) and P adequate (250 μm KH2PO4) conditions in hydroponics. Lentil genotypes exhibited significant variability for root, biomass, and P efficiency traits. Different techniques have identified various genotypes of lentils based on the efficiency of phosphorus uptake (PUPE) and the efficiency of phosphorus utilization (PUTE). IG 568229 showed the highest PUPE, while the wild ILWL-15 lentil showed the lowest PUPE in both media. The wild lentil ILWL-95 showed maximum PUTE under P adequate medium. The IC 560135, IG 334, IG 560157 and IG 568229 genotypes were found to be highly efficient at both P levels and to be ideal for a large range of P levels without having a drastic impact on biomass output.Conclusions: The primary step for breeding more P-efficient crop plants is the classification of the germplasm. IC 560135 and IC 268238 contrasting lentil lines may be useful for mapping population development, mapping and tagging of gene(s), QTLs for PUE in lentil. These efficient P crops also ensure food and nutritional security, in addition to reducing the cost of cultivation.

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“…But the crop plants absorb only 30-50% of applied nitrogen fertilizers and less than 20% of applied P fertilizers, and the rest is lost through surface runoff and leaching. Phosphorous obtained from non-renewable sources such as mines and rocks are immobilized in soil due to chemical fixation and microbial activity (Hari Gowthem et al, 2019). Nitrogen/phosphorous loss results in the depletion of their use efficiency which is measured as grain yield produced as a function of N/P available to that plant (Moll et al, 1982).…”

Section: Introductionmentioning

confidence: 99%

Physiological traits and expression profile of genes associated with nitrogen and phosphorous use efficiency in wheat

Sagwal

Kumar

Sihag

et al. 2023

Preprint

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Background Nitrogen (N) and phosphorous (P) play a very important role in growth and development of wheat as well as major constituents of biological membrane. To meet the plant nutritional demand these nutrients applied in the form of fertilizers. But plant can utilize only half of the applied fertilizer whereas rest is lost thorough surface run off, leaching and volatilization. Thus, to overcome the N/P loss we need to elucidate the molecular mechanism behind the N/P uptake. Methods In our study, we used DBW16 (low NUE), and WH147 (high NUE) wheat genotypes under different doses of N, whereas HD2967 (low PUE) and WH1100 (high PUE) genotypes were studied under different doses of P. To check the effect of different doses of N/P, the physiological parameters like Total chlorophyll content, net photosynthetic rate, N/P content, and N/PUE of these genotypes were calculated. In addition, gene expression of various genes involved in N/P uptake, utilization, and acquisition were studied by quantitative real time- PCR. Results Statistical analysis revealed a lower percent reduction in TCC, NPR, N/P content in N/P efficient wheat genotypes (WH147 & WH1100). A significant increase in relative fold expression of genes under low N/P concentration was observed in N/P efficient genotypes as compared to N/P deficient genotypes. Conclusion Significant differences in physiological data and gene expression among N/ P efficient and deficient wheat genotypes could be useful for future improvement of N/P use efficiency.

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Genetic variation for phosphorus-use efficiency in diverse wheat germplasm

Cited by 7 publications

References 19 publications

Identification of QTL Associated with Agro-Morphological and Phosphorus Content Traits in Finger Millet under Differential Phosphorus Supply via Linkage Mapping

Identification of QTL Associated with Agro-Morphological and Phosphorus Content Traits in Finger Millet under Differential Phosphorus Supply via Linkage Mapping

WITHDRAWN: Effectiveness of the Classification for the Phosphorus Use Efficiency Traits at the Seedling Stage in Lentil

Physiological traits and expression profile of genes associated with nitrogen and phosphorous use efficiency in wheat

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