Genetics of Morpho-Physiological Traits in Segregating Populations of Interspecific Hybrid Rice Under Stress and Non-Stress Conditions

Efisue, Andrew; Tongoona, Pangirayi; Derera, John; Ubi, Benjamin Ewa; Oselebe, Happiness Ogba

doi:10.1080/15427520902976471

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…To conclude from both these fields and the previous biotron The results of the present study indicate spikelet fertility and weight of 100 grains as important grain yield components having an impact on total grain yield. These findings correspond well with previous research, and thus, these parameters can serve as selection criteria for high grain yield under both drought and well-watered conditions (Efisue, Tongoona, Derera, Ubil, & Oselebe, 2009;Panja, Garg, Mandi, Sarkar, & Bhattacharya, 2017).…”

Section: Discussionsupporting

confidence: 91%

Effect of intermittent drought on grain yield and quality of rice (Oryza sativa L.) grown in Rwanda

Mukamuhirwa

Hovmalm

Ortíz

et al. 2019

J Agronomy Crop Science

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The climate change will contribute drought and temperature extremes to rice growing systems, especially when cultivated in equatorial regions. To evaluate opportunities to cultivate and breed drought‐tolerant rice, seven rice cultivars were evaluated in Rwanda for recurring morphological drought scores, grain yield and components, and quality characteristics. The cultivation conditions, that is site and drought treatment, impacted morphological drought scores, growth and yield attributes, while cultivar affected quality attributes. Thus, site showed a higher impact on grain yield and components than drought and cultivar, with generally a reduced grain yield at the low‐temperature site, as a result of low spikelet fertility. Morphological drought scores were generally increased by drought, while drought at the reproductive stage at the high‐temperature site was negative for yield and its components. The cultivars “Intsindagirabigega” and “Jyambere” were adapted to high‐temperature site conditions. The cultivar “Intsindagirabigega” had the highest amylose content, and “Mpembuke,” the highest antioxidant capacity. Thus, climate change with increased temperature and drought extremes may increase rice productivity in cool areas, while especially drought at reproductive stage will be detrimental in low altitude areas with high temperature. Cultivar variation indicated opportunities for selection and breeding of climate change tolerant rice cultivars which should be of immediate priority.

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Section: Discussionsupporting

confidence: 91%

Effect of intermittent drought on grain yield and quality of rice (Oryza sativa L.) grown in Rwanda

Mukamuhirwa

Hovmalm

Ortíz

et al. 2019

J Agronomy Crop Science

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“…Knowledge of heritability of a trait is important because it determines the extent to which plant improvement through selection is possible. A parent-offspring regression gives heritability estimates and provides a measure of GCA (General Combining Ability) of parents for a trait [17]. The yield components of genotypes should have sufficient genetic variation and be highly heritable to ease selection process in population improvement.…”

Section: Heritability Estimatesmentioning

confidence: 99%

“…Four genomic regions, which are high QTLs density have been reported [16a,]. The rice species O. glaberrima has good agronomic traits [17], Fe toxicity tolerance QTLs has been identified from O. glaberrima using an interspecific backcross population [18b], these could be used in rice population development for good agronomic traits. The work on iron toxicity tolerance QTL analysis has been found to be limited with 203 QTLs from 16 mapping populations.…”

Section: Introductionmentioning

confidence: 99%

Effects of Iron on the Productivity of Lowland Rice (O. sativa L.) in Segregating Populations

Andrew¹,

Dorcas²,

Olawale³

2020

AJAF

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Rice plants have the tendency of taking up iron in the form of Fe 2+ , which is prevalent in paddy fields under flooded environments. But its deficiency or in excess of Fe 2+ in the soil affect several physiological functions of the plant. The objective of the study was to evaluates the effect of three ferrous sulphate concentration levels on the yield and yield components of lowland segregating rice populations. Three experiments were established in screenhouse concurrently in randomized complete block design in three replications in pots. Treatment comprised of 6 breeding lines each from two rice populations of F2 and F3 generations and two popular checks. Experiment one is the control without FeSO 4 treatment, while experiment two and three are F2 and F3 populations, respectively treated with FeSO 4 solution. Three concentration levels of FeSO 4 solution (600mg/kg of soil, 1200mg/kg of soil, and 1800mg/kg of soil,) were applied into each pots a week before transplanting in the treated experiments. Remarkable reduction in effective tiller number at 1800mg of Fe stress relative to the control was observed of 42.6% and 42.9% in F2 and F3 population, respectively. Significant reduction in grain yield of 33.5% and 36.4% at 1800mg of Fe compared to the control in F2 and F3 populations, respectively. The study showed that at 1200mg of Fe could be optimal for rice crop performance and at 1800mg of Fe becomes toxic to the plant as observed significant reduction in all agronomic traits especially in total grain yield. In F2 and F3 population, UPN 59, UPIA 2 and UPN 95 where the most stable genotypes across iron concentration levels. These genotypes could be used in population development for iron breeding programme.

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“…Other studies have also indicated abscisic acid accumulation, variation in root development, carbon isotope discrimination, and proline accumulation which regulate the crop's differential performance under water-limited conditions [6][7][8][9]. On the other hand, the mechanisms underlying these traits are regulated by several genes within the cassava genome which can be targeted in breeding to select improved cassava genotypes for drought-prone ecologies [10][11][12]. For instance, 10 candidate genes have been found to be associated with drought tolerance mechanisms in cassava which are upregulated under stress to mitigate the negative effects of moisture stress [6].…”

Section: Introductionmentioning

confidence: 99%

Genotypic Variability in Some Morpho-Physiological Traits in Different Environments and Their Relationship with Cassava (Manihot esculentaCrantz) Root Yield

Adjebeng‐Danquah

Asante

Manu-Aduening

et al. 2020

International Journal of Agronomy

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Cassava root yield under diverse environments is influenced by morpho-physiological traits that are in turn influenced by genotype, environment, and genotype × environment interaction (GEI). Most GEI analyses in cassava have been limited to root yield with less emphasis on stability of other yield-related traits. This study was carried out to assess the effect of GEI on some morpho-physiological traits in cassava and key traits that are useful for selection in different environments. The study utilized 20 cassava genotypes evaluated in six environments, namely, Fumesua 2013 and 2014, Nyankpala 2013 and 2014 (irrigation), and Nyankpala 2013 and 2014 (no irrigation). The genotypes were arranged in a randomized complete block design (RCBD) with three replications and assessed for a number of morpho-physiological traits, root yield and yield components. The data were subjected to analysis of variance using SAS statistical package. Subsequently, the GGE biplot was used to carry out genotype × environment, genotype × trait, and environment × trait interaction analyses to determine the specificity of genotypic performance and traits linked to particular environments. The results indicated significant (P<0.05) GEI effect on all traits except leaf temperature. The genotype × trait biplot analysis revealed closely related traits and those associated with root yield and genotypes that show weakness in these traits. Both environment × trait biplot and principal component analyses identified traits with higher discriminatory power among genotypes in various environments particularly in the dry environments. These can be used as secondary traits to select drought-tolerant genotypes. From this study, the GGE biplot was useful in identifying traits associated with specific genotypes in different environments to aid in selection. Moderate broad-sense heritability estimates werefound for storage root yield, harvest index, plant height, ratio of storage rootlength to girth, and cassava mosaic disease score indicating that progresscan be made through selection for these traits.

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Genetics of Morpho-Physiological Traits in Segregating Populations of Interspecific Hybrid Rice Under Stress and Non-Stress Conditions

Cited by 9 publications

References 10 publications

Effect of intermittent drought on grain yield and quality of rice (Oryza sativa L.) grown in Rwanda

Effect of intermittent drought on grain yield and quality of rice (Oryza sativa L.) grown in Rwanda

Effects of Iron on the Productivity of Lowland Rice (O. sativa L.) in Segregating Populations

Genotypic Variability in Some Morpho-Physiological Traits in Different Environments and Their Relationship with Cassava (Manihot esculentaCrantz) Root Yield

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