Genetic variability, heritability and genetic advance in first clonal stage of sugarcane

G, Somu; Te, Nagaraja

doi:10.22271/chemi.2020.v8.i2o.8890

Cited by 3 publications

(1 citation statement)

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“…3). Similar findings were reported by Gowda et al [19] as heritability is a good index of transmission of characters from parents to its progeny; Alam et al [20] for number of millable cane; Ranjan and Kumar [21] and Dereje. S. [22] for Cane diameter at harvest (cm) and CCS yield.…”

Section: Resultssupporting

confidence: 84%

Genetic Studies in Advanced Sugarcane Mid-Late Clones through Yield and Quality Traits

Rakesh,

Reddy,

Dinesh

et al. 2023

IJECC

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Sugarcane varietal development is frequently aimed at increasing yield and sucrose quality. Effective crop genetic evolution requires knowledge of the numerous traits that contribute to the present diversity by genetic analysis. Keeping in view, this experiment was conducted using a randomized block design with three replications and the trial consisted of nine mid-late sugarcane genotypes. Data on cane yield and quality traits were used to estimate the genetic variability parameters, heritability, and genetic advance (GA). Analysis of variance revealed highly significant and significant differences for all studied traits. Evaluated characters exhibited different levels of variability, heritability, and genetic advance among the studied genotypes. Low to high phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were recorded. The moderate GCV and PCV values were found particularly for Sugar Yield at harvest (18.09% and 21.64%) and Cane Yield at harvest (16.62% and 20.14%) respectively, whereas the lowest GCV and PCV (1.43% and 2.26% respectively) manifested for Purity at the 12 months stage. The highest broad sense heritability value manifested for Pol in juice at 12 months stage (%) (86.47%) followed by CCS at 12 months stage (%) (85.43%), while the lowest heritability (35.00%) revealed only for Germination % at 30 DAP. In the present study, high heritability and genetic advance as a percentage of the mean (>50) was recorded for Millable canes at harvest (000/ha) and single cane weight at harvest (kg) indicating a predominance of additive gene action for these characters. Therefore the result of this study suggests the existence of variability for cane yield and quality traits in these sugarcane genotypes, which should be exploited in future breeding.

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Section: Resultssupporting

confidence: 84%

Genetic Studies in Advanced Sugarcane Mid-Late Clones through Yield and Quality Traits

Rakesh,

Reddy,

Dinesh

et al. 2023

IJECC

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Identification of promising sugarcane (Saccharum officinarum L.) families and clones based on cane and sugar productivity traits in early selection stages

K.,

Patil,

et al. 2024

Preprint

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Sugarcane is a major source of sugar, facing constant pressure to enhance productivity due to the increased cost of cultivation and fluctuating global market prices. Identification of productive hybrid progenies for varietal development plays a crucial role in enhancing productivity, which is a cost-effective approach. Selecting the right parent combinations in breeding is essential for creating high-yielding progenies. In this context, 33 families were evaluated for germination, seedling survival percentage and productivity traits in the segregating seedling generation. Overall across diverse crosses, out of 3,020 seedlings, 2,284 survived, with certain crosses showing better performance. A total of 482 clones were selected based on their productivity and visual traits of commercial importance compared to the popular check, Co 86032. These selected clones were further evaluated for cane and sugar productivity traits in the first clonal generation. High heritability was observed for most traits, indicating the effectiveness of selection. Among the clones studied, SNK 191675, SNK 190690 and SNK 191748 exhibited significantly higher cane and sugar productivity traits compared to the popular check, Co 86032. Furthermore, this study identified promising families such as CoVC 14062 × CoT 8201, Thirumadhuram × CoPant 97222, Co 86032 × CoSe 92423, CoVC 14062 × Co 775, MS 68/47, Co 86011 and Co 99004, showing superior performance in both the seedling and first clonal generations in terms of germination, seedling establishment and the percentage of selectable segregants, along with productivity traits. These results hold significant importance for identifying promising families and productive clones to enhance cane and sugar productivity.

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Identification long non-coding RNAs, miRNAs and their targets in witches’ broom disease tolerance in cocoa (Theobroma cacao L.)

Das,

Veluru,

Das

et al. 2023

IJGPB

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A large part of transcripts is non-coding, which is transcribed from junk DNA; long non-coding RNAs and micro-RNAs regulate theexpression levels of mRNAs. For the first time, we identified lncRNAs and miRNAs with their regulatory role in the disease toleranceof Theobroma cacao. In this study, about 2616 lncRNAs and 153 miRNAs were identified from 10 RNA-seq data representing healthyand witches’ broom diseased tissues of cocoa. Around 604 lncRNAs are differentially expressed among healthy and diseased tissues.LncRNAs targeted 9692 mRNAs; 8827 are cis-acting, and 765 are trans-acting. Among targeted mRNAs, 281 are disease resistance-related transcripts, and 211 transcription factors (TFs) belong to more than 50 TF families, which were found to be involved in the regulation of the disease tolerance process. The identified 153 miRNAs belong to 27 miR families, and around 5337 mRNAs are targeted by the miRNAs, among them 114 codes for TFs and 170 codes for disease resistance protein. Ethylene responsive factor, bHLH, WRKY, MYB, bZIP, GTE, GATA, and heat stress transcription factors are the dominant TFs targeted by lncRNAs, and miRNAs play vital roles in disease progression and tolerance. A total of 55 lncRNAs-miRNAs interacting pair is identified, which were working on endogenous target mimics (e-TMs) mechanism and influenced the expression of 955 mRNAs. The ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) biological pathway analysis reveal that ncRNAs and their targets mRNAs code for transcription factors and genes that are involved in the disease tolerance processes, including synthesis of disease resistance proteins, amino acids, antibiotics, intracellular proteins that directly or indirectly recognize pathogen effectors are essential for plant biotic stress condition. The present study provides lncRNA and miRNA-based regulatory insight into the genes governing disease progression and tolerance in cocoa.

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Genetic variability, heritability and genetic advance in first clonal stage of sugarcane

Cited by 3 publications

References 0 publications

Genetic Studies in Advanced Sugarcane Mid-Late Clones through Yield and Quality Traits

Genetic Studies in Advanced Sugarcane Mid-Late Clones through Yield and Quality Traits

Identification of promising sugarcane (Saccharum officinarum L.) families and clones based on cane and sugar productivity traits in early selection stages

Identification long non-coding RNAs, miRNAs and their targets in witches’ broom disease tolerance in cocoa (Theobroma cacao L.)

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