Genetic Variability Studies in Segregating Generation of &lt;i&gt;Gossypium barbadense&lt;/i&gt; lines in cotton

Alkuddsi, Yanal; Patil, S. S.; Manjula, S.; Patil, B. C.; Nadaf, H. L.; Nandihali, B.S.

doi:10.5376/mpb.2013.04.0025

Cited by 3 publications

(3 citation statements)

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“…High heritability and low GAM were recorded by plant height, single plant yield, number of bolls per plant, ginning outturn, Upper Half Mean Length, uniformity index and bundle strength. Non additive nature of such traits was also revealed in the experiments conducted by Kale et al, (2007) and Alkuddsi et al, (2013) in upland cotton.…”

Section: Variability and Heritabilitymentioning

confidence: 54%

Genetic Studies for Yield and Fibre Quality Related Traits in Upland Cotton (Gossypium hirsutum L.) and Identification of Superior Transgressive Segregants

Nandhini¹,

Premalatha²,

Saraswathi³

et al. 2019

Int.J.Curr.Microbiol.App.Sci

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Improvement of agronomic traits and fibre quality in cotton requires detailed information on genetic variation available in the population. The objective of this study was to investigate variability, heritability and character association in nine agronomic and five fibre quality traits among 220 recombinant inbred lines (RILs) derived from MCU 5 and TCH1218. The study was undertaken during kharif 2018-19 at Department of cotton, TNAU, Coimbatore. High PCV and GCV were exhibited by number of monopodia per plant, while moderate GCV and high PCV were recorded by number of bolls per plant. The traits boll weight, single plant yield, lint index and fibre fineness exhibited moderate GCV. Most of traits except five were in similar trend for GCV and PCV indicating less environmental influence. All traits had high heritability, whereas high GAM was expressed for number of monopodia per plant, boll weight, lint index, elongation percentage and fibre fineness. Such traits were additive in nature and process of selection will be effective. Number of bolls per plant and number of sympodia per plant were positively and significantly correlated with single plant yield. In fibre quality, bundle strength and elongation percentage were significantly and positively correlated with upper half mean length. So, while selecting high yielding genotypes these traits are to be considered. Superior transgressive segregants for single plant yield was identified as RIL 44 as it performed better for other yield component traits, while for fibre quality RIL 63 performance was comparatively higher. Among the population RIL 220 ranked top for single plant yield and upper half mean length. Fibre quality traits had few favourable segregants when compared to yield traits. These identified RILs can be used in advance breeding trial for varietal development.

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Section: Variability and Heritabilitymentioning

confidence: 54%

Genetic Studies for Yield and Fibre Quality Related Traits in Upland Cotton (Gossypium hirsutum L.) and Identification of Superior Transgressive Segregants

Nandhini¹,

Premalatha²,

Saraswathi³

et al. 2019

Int.J.Curr.Microbiol.App.Sci

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“…In addition, the phenotypic variance was 31.38, genotypic variance was 4.53 and the GCV and PCV values for number of bolls/plant were low to moderate (Alkuddsi et al, 2013). The present work aimed to study the efficiency of pedigree selection in improving number of bolls/plant to isolate superior families and consequently improving seed cotton in yield.…”

Section: Introductionmentioning

confidence: 96%

“…However, at a fixed selection pressure, the amount of advance varies with magnitude of heritability. Genetic advance in a population cannot be predicted from heritability alone, the genetic gain for specific selection pressure has to be worked out (Basbag andOktay, 2004 andAlkuddsi et al, 2013). Highly significant differences among selected families for number of balls/plant and correlated traits i.e., seed cotton yield/plant, lint yield/plant, boll weight and seed index were reported in previous studies (Khan et al, 2009;Soomro et al, 2010;Mahdy et al, 2013 andAhsan et al, 2015).…”

Section: Introductionmentioning

confidence: 97%

Pedigree selection for number of bolls/plant in two segregation populations of Egyptian cotton (Gossypium barbadense L.)

Ali

Hassan

Mohamed³

et al. 2021

SVU-International Journal of Agricultural Sciences

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This work aimed to study the efficiency of pedigree selection for number of bolls/plant to isolate superior families in two segregating population of Egyptian cotton (Giza-90 × Giza-86) and (Giza-95 × Giza-80) in the F 2 -F 4generations. The experiments were conducted at South Valley University Experimental Farm, Qena, Egypt during summer seasons 2018 to 2020. Differences among the F 4 -selected families were highly significant for the selection criterion; number of bolls/plant and all correlated traits after two cycles of selection in both populations. The genetic variability retained after two cycles of selection was greater and sufficient for further cycles of selection of the selection criterion; number of bolls/plant in both populations. However, all studied correlated traits showed greater genotypic variability in both populations after two cycles of selection. After two cycles of selection, number of bolls/plant increased by 10.67 and 12.41% in population I and 10.58 and 17.26% in population II from the better parent and the bulk sample, respectively. Selection for number of bolls/plant was accompanied by favourable decrease in days to first flower in both populations. However, desirable increase for most correlated traits i.e., boll weight, seed cotton yield/plant, lint yield/plant and lint percentage in both populations. Two families; No. 96 and 178 in population I and family No. 60 in population II could be considered the best selected families resulted from selection for number of bolls/plant. Pedigree selection for number of bolls/plant was effective in isolating genotypes for high number of bolls.

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Combining ability and multiple parent‐based approach to derive simultaneous transgressive segregants for multiple traits in cotton (Gossypium hirsutum L.)

Nidagundi,

Hugar,

Revanasiddayya

et al. 2024

Plant Breeding

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Plant breeders are always in pursuit of desirable genes and gene complexes, leading to identification of potential and promising individuals/segregants often exhibiting traits with higher intensity. Identifying segregants with desirable combination of multiple traits would enable a breeder to develop superior cultivars. In this study, combining ability and multiple parent‐based approach was employed to derive segregants simultaneously superior for multiple traits. Single and double crosses were developed by crossing 11 parental lines in half diallel fashion and were evaluated under seven environments. To create crosses, the parental lines with the highest positive gca effects were selected in addition to desirable yield and fibre quality traits (SCYP, NOBP, BW, GOT, UHML and FS). The positive and significantly higher gca effects in these parents is an evidence of prominence of additive and additive × additive component of genetic variance. To identify desirable segregants, six F2 populations derived from four single and their two double crosses were evaluated by raising an optimal population size of 910–935 and 3040–3055 plants for single and double crosses, respectively. In each population, proportion of desirable and simultaneous transgressive segregants was estimated. A total of 19 (2.87%), 22 (3.32%) and 24 (3.60%) plants were transgressive in nature simultaneously for multiple traits in single crosses, namely, RAHH‐1755 and RAHH‐455, and double cross, namely, RHDC‐1933, of Group I, respectively. While in Group II, 22 (3.32%), 22 (3.32%) and 24 (3.60%) plants showed simultaneous transgressive segregation in RAHH‐1702, SHH‐818 and RHDC‐1940, respectively. The per cent simultaneous transgressive segregants were found to be higher in the double crosses compared with their respective single crosses, possibly for the reason that double crosses involve more number of parents owing to increased recombination. Hence, breeding for desirable segregating recombinants using diallel and multiple parent‐based approach paves the way towards directional selection based on combining ability making it more efficient compared with conventional means of hybridization followed by selection.

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Genetic Variability Studies in Segregating Generation of <i>Gossypium barbadense</i> lines in cotton

Cited by 3 publications

References 0 publications

Genetic Studies for Yield and Fibre Quality Related Traits in Upland Cotton (Gossypium hirsutum L.) and Identification of Superior Transgressive Segregants

Genetic Studies for Yield and Fibre Quality Related Traits in Upland Cotton (Gossypium hirsutum L.) and Identification of Superior Transgressive Segregants

Pedigree selection for number of bolls/plant in two segregation populations of Egyptian cotton (Gossypium barbadense L.)

Combining ability and multiple parent‐based approach to derive simultaneous transgressive segregants for multiple traits in cotton (Gossypium hirsutum L.)

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