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Toorchi, Mahmoud; Shashidhar, H. E.; Hittalmani, Shailaja; Gireesha, T. M.

doi:10.1023/a:1016317906963

“…Narrow sense heritability ranged from low to moderate in both studied crosses. Similar results were reported by Toorchi et al (2002), Gomez andKalamani (2003), Abd El-Lattef et al (2008) Hijam et al (2012) and Concepcion et al (2015).…”

Section: -Estimates Of Genetic Variance Heritability and Genetic Adsupporting

confidence: 88%

Genetic Behavior of Some Root and Grain Quality Traits Under Water Deficit and Normal Conditions in Rice (Oryza Satival.)

Hassan¹

2017

Menoufia Journal of Plant Production

1

2

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This study aimed to determine heterosis, gene action, heritability, genetic advance and phenotypic correlation response to select and predict by the new lines for some root traits (Root length, Root volume, Number of roots/plant and Root/Shoot ratio %) and some grain quality traits. Flush water irrigation was added every 12 days intervals. The results indicated that highly significant and positive heterosis as a deviation from mid-and better-parent were obtained for all root and grain quality, except for grain shape in the first cross and for grain length in the second cross which showed highly significant and negative estimates of heterosis as a deviation from mid-parent. In addition, incomplete dominance to over-dominance was operative for most of the studied traits. Additive gene effect (d) and dominance gene effect (h) were more important in the genetic system for all the studied characters, additive x additive gene effects (i), additive x dominance (j) and dominance x dominance (l) gene effects were involved in the genetic control of all characters, except some exceptions. Heritability in broad sense was high in most traits of the two studied crosses, except cross I for root/ shoot ratio under normal condition. The highest value of heritability estimates (95.95 %) was recorded for root volume in the cross I under normal condition. The narrow sense heritability was moderate to low in most traits of the two crosses. High values of predicted genetic advance were estimated for most traits of the studied traits. Significant or highly significant positive phenotypic correlation was found between most of the studied characters for the two studied crosses especially between root and grain quality characters with grain yield/ plant, except amylose content trait. In general the cross Giza 159 x Takanari 1 could be grown under water deficit for further screening and selecting desirable root and grain quality traits at the same time.

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“…Narrow sense heritability ranged from low to moderate in both studied crosses. Similar results were reported by Toorchi et al (2002), Gomez and Kalamani (2003), Abd El-Lattef et al (2008) Hijam et al (2012 and Concepcion et al (2015).…”

Section: -Estimates Of Genetic Variance Heritability and Genetic Advancesupporting

confidence: 87%

Genetic Behavior of Some Root and Grain Quality Traits Under Water Deficit and Normal Conditions in Rice (Oryza Sativa L.)

Hassan

¹

2017

Menoufia Journal of Plant Production

0

View full text Add to dashboard Cite

This study aimed to determine heterosis, gene action, heritability, genetic advance and phenotypic correlation response to select and predict by the new lines for some root traits (Root length, Root volume, Number of roots/plant and Root/Shoot ratio %) and some grain quality traits. Flush water irrigation was added every 12 days intervals. The results indicated that highly significant and positive heterosis as a deviation from mid-and better-parent were obtained for all root and grain quality, except for grain shape in the first cross and for grain length in the second cross which showed highly significant and negative estimates of heterosis as a deviation from mid-parent. In addition, incomplete dominance to over-dominance was operative for most of the studied traits. Additive gene effect (d) and dominance gene effect (h) were more important in the genetic system for all the studied characters, additive x additive gene effects (i), additive x dominance (j) and dominance x dominance (l) gene effects were involved in the genetic control of all characters, except some exceptions. Heritability in broad sense was high in most traits of the two studied crosses, except cross I for root/ shoot ratio under normal condition. The highest value of heritability estimates (95.95 %) was recorded for root volume in the cross I under normal condition. The narrow sense heritability was moderate to low in most traits of the two crosses. High values of predicted genetic advance were estimated for most traits of the studied traits. Significant or highly significant positive phenotypic correlation was found between most of the studied characters for the two studied crosses especially between root and grain quality characters with grain yield/ plant, except amylose content trait. In general the cross Giza 159 x Takanari 1 could be grown under water deficit for further screening and selecting desirable root and grain quality traits at the same time.

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“…This trend also agreed with our result, showing a higher rate of increase in RDW/SDW. The significance (p<0.01) of the correlation between RDW/SDW and RDW suggested that the lines with the highest ratio tend to maintain a higher RDW (Toorchi et al 2002). Measurement of phenotypic plasticity of root traits revealed that most lines had positive values for RDW/SDW, RDW/TDW, SRL, and MRL/SL.…”

Section: Discussionmentioning

confidence: 98%

“…The pipes were carefully removed and immersed in a water tank for 24 hours for sampling. The roots were then cleaned, following which different root and shoot traits were measured, similar to the prior study (Toorchi et al 2002). Different traits measured were maximum root length (MRL), shoot length (SL), root volume (RV), root dry wt.…”

Section: Root Phenotyping Using Polyvinyl Chloride (Pvc)pipe Methodsmentioning

confidence: 99%

Root attributes governing drought stress adaptation and the associated molecular markers in chromosome segment substitution lines in rice (Oryza sativa L.)

Barik,

Pattnaik,

Dash

et al. 2023

J Exp Bio & Ag Sci

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0

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The wild relatives of cultivated rice offer crucial resistance genes for combating stresses like drought. Developing rice varieties with drought tolerance is possible through chromosome segment substitution lines (CSSLs), which blend the genetic background of a high-yielding parent with specific chromosome segments from a donor parent. This study aimed to study the effect of drought stress on various root traits of chromosome segment substitution lines (CSSLs) and their relationship with specific molecular markers. Ninety-six genotypes, including 80 chromosome segment substitution lines (Curinga x O. rufipogon and Curinga x O. meridionalis), 9 New Rice for Africa (NERICAs) and 7 controls were grown in Basket and PVC pipe methods for phenotyping different root traits. Under drought stress (DS), MER16, MER20, RUF10, RUF16, RUF44, NERICA1, and NERICA3 showed superior performance for most of the root traits. These evaluations were supplemented with association analysis of 17 root trait-linked simple sequence repeat (SSR) markers with root phenotypic traits. The marker RM201 is strongly associated with multiple root traits, found to be independent of three growth conditions (well-watered “WW” under Basket, WW condition and DS conditions under PVC pipe). The marker RM316 is associated with root volume, and the marker RM7424 and RM1054 show maximum root length. In conclusion, these markers can be used in marker-assisted breeding programs, and the lines carrying them can be used as parental lines in variety-development programs for drought tolerance.

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Cited by 15 publications

References 14 publications

Genetic Behavior of Some Root and Grain Quality Traits Under Water Deficit and Normal Conditions in Rice (Oryza Satival.)

Genetic Behavior of Some Root and Grain Quality Traits Under Water Deficit and Normal Conditions in Rice (Oryza Satival.)

Genetic Behavior of Some Root and Grain Quality Traits Under Water Deficit and Normal Conditions in Rice (Oryza Sativa L.)

Root attributes governing drought stress adaptation and the associated molecular markers in chromosome segment substitution lines in rice (Oryza sativa L.)

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