Relationships of stay green trait in maize

Bekavac, Goran; Stojaković, Milisav; Ivanovic, M.; Jocković, Djordje; Vasić, Nenad; Purar, Božana; Boćanski, Jan; Nastasić, Aleksandra

doi:10.2298/gensr0201033b

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…We therefore assume that a drying stem would possibly lead to faster grain drying and lower grain moisture at harvest time, which typically is not a factor in sweet sorghum production. In a previous study regarding relationships of stay green trait in maize, the grain moisture at harvest time was highly significantly correlated with stalk water content [ 38 ]. Thus the fine mapping of the dry stalk locus in present study could be applied in marker assisted selection program for more timely harvest in both biomass and grain sorghums and shed some light on other important crops like corn and rice etc.…”

Section: Discussionmentioning

confidence: 99%

Combining Next Generation Sequencing with Bulked Segregant Analysis to Fine Map a Stem Moisture Locus in Sorghum (Sorghum bicolor L. Moench)

Han

Hou

et al. 2015

PLoS ONE

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Sorghum is one of the most promising bioenergy crops. Stem juice yield, together with stem sugar concentration, determines sugar yield in sweet sorghum. Bulked segregant analysis (BSA) is a gene mapping technique for identifying genomic regions containing genetic loci affecting a trait of interest that when combined with deep sequencing could effectively accelerate the gene mapping process. In this study, a dry stem sorghum landrace was characterized and the stem water controlling locus, qSW6, was fine mapped using QTL analysis and the combined BSA and deep sequencing technologies. Results showed that: (i) In sorghum variety Jiliang 2, stem water content was around 80% before flowering stage. It dropped to 75% during grain filling with little difference between different internodes. In landrace G21, stem water content keeps dropping after the flag leaf stage. The drop from 71% at flowering time progressed to 60% at grain filling time. Large differences exist between different internodes with the lowest (51%) at the 7th and 8th internodes at dough stage. (ii) A quantitative trait locus (QTL) controlling stem water content mapped on chromosome 6 between SSR markers Ch6-2 and gpsb069 explained about 34.7-56.9% of the phenotypic variation for the 5th to 10th internodes, respectively. (iii) BSA and deep sequencing analysis narrowed the associated region to 339 kb containing 38 putative genes. The results could help reveal molecular mechanisms underlying juice yield of sorghum and thus to improve total sugar yield.

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Section: Discussionmentioning

confidence: 99%

Combining Next Generation Sequencing with Bulked Segregant Analysis to Fine Map a Stem Moisture Locus in Sorghum (Sorghum bicolor L. Moench)

Han

Hou

et al. 2015

PLoS ONE

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“…Diff1 and Diff2 could indicate the stay-green phenotype. In other word, delayed leaf senescence (stay-green) indicates the performance of maize to maintain normal metabolic processes under abiotic stress [33][34][35][36][37][38]. A study suggested that a lower rate of chlorophyll loss was often used as an indicator for selecting potato plants with drought tolerance [33].…”

Section: Phenotypic Analysis and Smith Indice Estimation For 34 S 2 F...mentioning

confidence: 99%

Dot Blot Assay for Assessing Trehalose-6-phosphate Synthase Gene Expression in a Maize Breeding Population under Water Stress

Hannok

Lowantha

2022

Curr. Appl. Sci. Technol.

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Field maize is an important economic crop grown around the world and it has been mainly used in the animal feed industry. Maize yields have been inadequate for the demand due to drought events. One way to alleviate yield losses is to develop drought tolerant maize varieties for farmers. Trehalose-6-phosphate synthase (TPS) is an important enzyme involved in trehalose biosynthesis which has been found to increase plant tolerance to abiotic stresses. The aim of this research was to screen the levels of TPS gene expression in maize breeding materials under water stress via dot-blot hybridization using cDNA probe. To do so, 34 S2 maize families were grown and subjected to water stress condition. Leave samples were collected at 6 different days after planting (DAP) for a dot blot assay. The results showed that the level of TPS gene expression was highest at 4 days after stress (relative intensity at 64 DAP). However, dot blotting at 6 days after stress (relative intensity at 66 DAP) was effective to differentiate maize families. Furthermore, a moderate negative relationship between relative signal intensity at 66 DAP (RI66) and Smith index based on multi-phenotypic traits was found to be statistically significant. Our study showed that maize with high TPS gene expression tended to be less tolerant to water stress. It is noteworthy that the study of TPS gene expression in mature maize under stress in this study showed results that contrasted with previous reports on seedlings in many plant species. Furthermore, we found that 4 out of 34 S2 maize families may have potential for further use in our breeding program.

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“…Stay green is an indicator of good plant health especially in drought conditions, which leads to reduced senescence, adaptability to stalk lodging, and post-flowering dehydration. This trait ensures superiority of plants compared to non-stay-green ones [41]. When green plant tissue area contributes more than the average of total plant area, and the grain moisture is lower or equal to the population average, that plants are regarded as stay green [42].…”

Section: Stay Green (Sg)/non-senescencementioning

confidence: 99%

Morpho-Physiological Mechanisms of Maize for Drought Tolerance

Hasibuzzaman¹,

Akter²,

Bagum³

et al. 2021

Plant Stress Physiology

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Maize is one of the mostly consumed grains in the world. It possesses a greater potentiality of being an alternative to rice and wheat in the near future. In field condition, maize encounters abiotic stresses like salinity, drought, water logging, cold, heat, etc. Physiology and production of maize are largely affected by drought. Drought has become a prime cause of agricultural disaster because of the major occurrence records of the last few decades. It leads to immense losses in plant growth (plant height and stem), water relations (relative water content), gas exchange (photosynthesis, stomatal conductance, and transpiration rate), and nutrient levels in maize. To mitigate the effect of stress, plant retreats by using multiple morphological, molecular, and physiological mechanisms. Maize alters its physiological processes like photosynthesis, oxidoreductase activities, carbohydrate metabolism, nutrient metabolism, and other drought-responsive pathways in response to drought. Synthesis of some chemicals like proline, abscisic acid (ABA), different phenolic compounds, etc. helps to fight against stress. Inoculation of plant growth-promoting rhizobacteria (PGPR) can result to the gene expression involved in the biosynthesis of abscisic acid which also helps to resist drought. Moreover, adaptation to drought and heat stress is positively influenced by the activity of chaperone proteins and proteases, protein that responds to ethylene and ripening. Some modifications generated by clustered regularly interspaced short palindromic repeat (CRISPR)-Cas9 are able to improve maize yield in drought. Forward and reverse genetics and functional and comparative genomics are being implemented now to overcome stress conditions like drought. Maize response to drought is a multifarious physiological and biochemical process. Applying data synthesis approach, this study aims toward better demonstration of its consequences to provide critical information on maize tolerance along with minimizing yield loss.

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Relationships of stay green trait in maize

Cited by 8 publications

References 9 publications

Combining Next Generation Sequencing with Bulked Segregant Analysis to Fine Map a Stem Moisture Locus in Sorghum (Sorghum bicolor L. Moench)

Combining Next Generation Sequencing with Bulked Segregant Analysis to Fine Map a Stem Moisture Locus in Sorghum (Sorghum bicolor L. Moench)

Dot Blot Assay for Assessing Trehalose-6-phosphate Synthase Gene Expression in a Maize Breeding Population under Water Stress

Morpho-Physiological Mechanisms of Maize for Drought Tolerance

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