Gene interactions and genetics of blast resistance and yield attributes in rice (Oryza sativa L.)

Balakrishnan, Divya; Biswas, Ankur; Robin, S.; Rabindran, R.; Joel, A. John

doi:10.1007/s12041-014-0395-7

Cited by 25 publications

(13 citation statements)

References 28 publications

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“…Since the inheritance relatively simple to get desirable grain weight the selection can be done whether under control or iron toxic condition. The simple gene effect and high heritability in grain weight was also reported in genetic study in rice for blast resistant (Divya et al, 2014) and salinity tolerance (Mohammadi, Mendioro, Diaz, Gregorio, & Singh, 2014).…”

Section: Gene Actionsupporting

confidence: 52%

Implication of Gene Action and Heritability Under Stress and Control Conditions for Selection Iron Toxicity Tolerant in Rice

et al. 2016

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Iron toxicity is major constraint of rice production in irrigated-lowland. The Improvement of tolerant rice cultivar to iron toxicity requires the information of some genetics parameters related to selected characters. This study was aimed to estimate gene action and heritability of the grain yield and its component under iron-toxic stress and control field conditions in rice. The iron-toxic tolerant rice cultivars, Pokkali and Mahsuri were crossed with the sensitive cultivar, Inpara5 to develop six generation populations. The breeding materials were grown in the iron toxicity site and control in Taman Bogo, Lampung Indonesia in the wet season from December 2013 to March 2014. The sensitive parent and BC1P1 had lower stress tolerance index (STI) compared to the tolerant parent F1, F2 and BC1P2. The grain yield and its component were fitted to the best model in five parameters which were more prominent with interactive epistasis of duplicate and complementary gene action. The heritability's under control were more higher compared to iron toxicity stress condition. Delaying selection to later generations and combining with the shuttle breeding between stressed and controlled environments were the best strategy for improving the grain yield and tolerance to iron toxicity in rice.

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Section: Gene Actionsupporting

confidence: 52%

Implication of Gene Action and Heritability Under Stress and Control Conditions for Selection Iron Toxicity Tolerant in Rice

et al. 2016

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“…One of the significant factors that is seriously threatening high production of rice is blast disease caused by the fungal pathogen Magnaporthe oryzae [10][11][12]. Blast disease accounted for 10%-20% yield loss in susceptible varieties and can be more than 80% in severe conditions [13].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Agro-Morphologic Performance, Genetic Parameters and Clustering Pattern of Newly Developed Blast Resistant Rice Lines Tested in Four Environments

et al. 2020

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Multi-environmental yield trial is very vital in assessing newly developed rice lines for its adaptability and stability across environments especially prior to release of the newly developed variety for commercial cultivation. The growth performance and phenotypic variability of these genotypes are the combination of environment, genotype and genotype by environment (G×E) interaction factors. Thus, evaluation creates an opportunity for effective selection of superior genotypes. The objectives of this study were to evaluate the newly developed blast resistant rice lines in varied environmental conditions, precisely measure the response of the advanced lines in multiple environments and classify the genotypes into groups that could serve as varieties for commercial cultivation. Genetic materials included 18 improved blast resistant rice lines and the recipient parent MR219. The total of 19 newly developed genotypes was evaluated under four varied environments in Peninsular Malaysia. The experiments were carried out using randomized complete block design (RCBD) with three replications at each environment. Data were collected on the vegetative, yield and yield component traits. Descriptive statistics (mean performance) and analysis of variance were conducted using SAS Software version 9.4. Genotypic and phenotypic coefficients, phenotypic variance component, heritability and genetic advance were also determined. Analysis of variance revealed that all traits were significantly different for genotypes except days to maturity, number of filled grains and total number of grains. Meanwhile, all the traits differed significantly for genotype × environment (G×E) except number of tillers per hill and number of panicles per hill. Low heritability (<30%) was found for all the traits. Similarly, low genetic advance was also observed for all the traits except for number of tillers per hill and number of panicles per hill. yield per hectare had significant and positive correlation with most evaluated traits except for days to flowering, days to maturity, plant height and number of unfilled grains. Cluster analysis classified the 19 evaluated genotypes into six groups. Therefore, the six clusters/groups of genotypes were recommended as varieties for commercial cultivation in Malaysia and other rice growing regions.

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“…The other two Sub1 varieties (Samba-Sub1 and BR11-Sub1) showed a marginal but insignificant enhancement in the grain yield. This deviation may be due to the manifold effects of the Sub1 locus expressed in a specific genetic background 35 , 36 . Introgression of other genes influencing grain yield along with Sub1 due to linkage or other small segments from the donor may also be responsible for the yield increment 37 .…”

Section: Discussionmentioning

confidence: 99%

No yield penalty under favorable conditions paving the way for successful adoption of flood tolerant rice

Dar¹,

Zaidi²,

Waza³

et al. 2018

Sci Rep

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Flooding is one of the major constraints for rice production in rainfed lowlands, especially in years and areas of high rainfall. Incorporating the Sub1 (Submergence1) gene into high yielding popular varieties has proven to be the most feasible approach to sustain rice production in submergence-prone areas. Introgression of this QTL into popular varieties has resulted in considerable improvement in yield after flooding. However, its impact under non-flooded conditions or years have not been thoroughly evaluated which is important for the farmers to accept and adopt any new version of their popular varieties. The present study was carried out to evaluate the effect of Sub1 on grain yield of rice in different genetic backgrounds, under non-submergence conditions, over years and locations. The study was carried out using head to head trials in farmer’s fields, which enable the farmers to more accurately compare the performance of Sub1 varieties with their recurrent parents under own management. The data generated from different head to head trials revealed that the grain yield of Sub1 varieties was either statistically similar or higher than their non-Sub1 counterparts under non-submergence conditions. Thus, Sub1 rice varieties show no instance of yield penalty of the introgressed gene.

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Gene interactions and genetics of blast resistance and yield attributes in rice (Oryza sativa L.)

Cited by 25 publications

References 28 publications

Implication of Gene Action and Heritability Under Stress and Control Conditions for Selection Iron Toxicity Tolerant in Rice

Implication of Gene Action and Heritability Under Stress and Control Conditions for Selection Iron Toxicity Tolerant in Rice

Assessment of Agro-Morphologic Performance, Genetic Parameters and Clustering Pattern of Newly Developed Blast Resistant Rice Lines Tested in Four Environments

No yield penalty under favorable conditions paving the way for successful adoption of flood tolerant rice

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