Broad sense and narrow sense heritability in F4 and F5 generations of finger millet, <i>Eleusine coracana</i> (L.) Gaertn

Dubey, Shikha; Rangaiah, S.

doi:10.5958/0975-928x.2019.00008.5

Cited by 2 publications

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“…Similar results were obtained for single plant yield by Anilkumar et al (2011), for days to 50 per cent (Palanisamy et al, 2018). Real heritability should be known for the improvement of a trait (Dubey et al, 2019). Regression estimates in this study indicated less environmental influence on these traits and selection based on their phenotypes in these generations is heritable.…”

Section: Resultssupporting

confidence: 89%

Parent progeny regression analysis in segregating generations of drought QTLs pyramided rice lines (Oryza sativa L.)

2021

EJPB

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The present study was undertaken to estimate the effectiveness of selection for the yield and yield contributing traits in the BC 2 F 3 and BC 2 F 4 generations of drought QTL introgressed progenies of Improved White Ponni (IWP) x Apo. A positively skewed and negatively skewed platykurtic curve was observed in many of the traits in both generations indicating the influence of a large number of genes. Significant and positive intergenerational correlation and regression coefficient values were obtained for all the yield contributing characters indicating that selection can be done in these generations for isolating superior genotypes. Narrow sense heritability estimates obtained high values for the traits days to 50 per cent flowering, the number of productive tillers, filled grains per panicle and single plant yield indicating that selection will be effective for these traits in these early generations.

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Section: Resultssupporting

confidence: 89%

Parent progeny regression analysis in segregating generations of drought QTLs pyramided rice lines (Oryza sativa L.)

2021

EJPB

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“…Heritability plays major role in the improvement of any trait (Dubey et al, 2019). Broad sense heritability was observed to be high for all the traits.…”

Section: Resultsmentioning

confidence: 98%

Marker assisted pyramiding of qDTY QTLs governing yield under drought stress into rice variety ADT(R)45

2023

EJPB

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Drought occurrence during reproductive stage of rice leads to significant yield loss. Rice production has to be doubled to feed the ever increasing human population. As the yield levels are stagnated under favourable production system, improvement of yield under unfavourable environment is key to attain the projected target. Therefore, the present study was undertaken to improve the drought tolerance of popular rice variety ADT(R)45 by introgressing major effect quantitative trait loci (QTLs) conferring yield under drought (qDTY 1.1 , qDTY 3.1 and qDTY 12.1 ) through marker assisted backcross breeding (MABB). Through MABB, 117 BILs in the background of ADT(R)45 were developed with different combinations of qDTY QTLs. The BILs were evaluated under rainfed target production environment and observations on nine biometrical and yield traits were recorded. Variability analysis revealed presence of additive gene action for the traits viz., total number of tillers per plant, number of productive tillers per plant, hundred grain weight, yield per hectare and single plant yield. Hence, selection based on these traits will be effective to improve yield under drought stress. Association analysis showed total number of tillers per plant, number of productive tillers per plant, panicle length, hundred grain weight and spikelet fertility percentage were highly correlated with yield per plant. Comparison of BILs with different QTL combinations showed that BILs with single QTL (qDTY 12.1 ) was better for most of the traits studied. BILs with single or two QTL combinations were found to perform better under rainfed condition, when compared to BILs with all the three QTLs.

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Broad sense and narrow sense heritability in F4 and F5 generations of finger millet, Eleusine coracana (L.) Gaertn

Cited by 2 publications

References 0 publications

Parent progeny regression analysis in segregating generations of drought QTLs pyramided rice lines (Oryza sativa L.)

Parent progeny regression analysis in segregating generations of drought QTLs pyramided rice lines (Oryza sativa L.)

Marker assisted pyramiding of qDTY QTLs governing yield under drought stress into rice variety ADT(R)45

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