Diallel analysis of upland cotton cultivars

Aguiar, Paulo Antonio de; Penna, Julio Cesar Viglioni; Freire, E. C.; Melo, L. C.

doi:10.12702/1984-7033.v07n04a04

Cited by 23 publications

(26 citation statements)

References 3 publications

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“…Parents with dominant genes were responsible for increased lint % in both generations. The present results are also in line with the findings of Tang et al (1993), McCarty et al (1996McCarty et al ( , 2004a, Hussain et al (1999), Ahmad et al (2003b), Yuan et al (2005), Aguiar et al (2007) and Ali and Awan (2009), who reported additive type of gene action with partial dominance for inheritance of lint%. However, Tang et al (1996), Godoy and Palomo (1999), Basal and Turgut (2005), Iqbal et al (2005), Mei et al (2006), Esmail (2007 and Gamal et al (2009) concluded non-additive type of gene action with over-dominance for lint %.…”

Section: Discussionsupporting

confidence: 92%

“…Tang et al (1996), Basal and Turgut (2005), Iqbal et al (2005), Khan et al (2005), Esmail (2007 and Aguado et al (2008) also mentioned that dominant gene effects were higher than additive for yield, because additive variance was found smaller than dominant components and that expression was also confirmed by degree of dominance. However, Luckett et al (1989), Ahmad et al (2003a,b), Aguiar et al (2007) and Gamal et al (2009) mentioned that for seed cotton yield, the additive gene effects were more important under favorable conditions but under stress, the nonadditive effects of the genes were more imperative. But heritability (h 2 ) values were much smaller relative to broad sense heritability in both environments indicating that the additive component was smaller than the other components of variance.…”

Section: Discussionmentioning

confidence: 99%

“…These results confirm the findings of Iqbal et al (2005) who reported overdominance type of gene action for seed cotton yield. However, Tang et al (1993), McCarty et al (1996), Ahmad et al (1997), Godoy and Palomo (1999), Hussain et al (1999), Khan (2003), Lukonge (2005), Wu et al (2006), Aguiar et al (2007), Lukonge et al (2007) and Khan et al (2007) reported additive type of genetic control for seed cotton yield. The discrepancies with respect of phenotypic manifestation of this complex parameter might be due to different cultivars used under different environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

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Genetic effects on morphological and yield traits in cotton (Gossypium hirsutum L.)

Khan¹,

Hassan²

1970

Span. j. agric. res.

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The nature and magnitude of genetic effects on morpho-yield traits were studied in a 6 × 6 F 1 and F 2 diallel cross in upland cotton. An additive-dominance model was adequate for most of the traits except plant height and seed cotton yield, where the model was partially adequate. Genetic parameters were estimated following Hayman's and Mather's model. Additive effects controlled lint percentage and monopodia in both generations, and plant height and sympodia in F 2 . Non-additive inheritance with over-dominance controlled yield in both generations, and plant height and sympodia in F 1 . Most traits presented an unequal proportion of positive (U) and negative (V) alleles in the loci (H 2 < H 1 ) and an asymmetrical distribution of genes in the parents (H 2 /4H 1 < 0.25 and F different to zero). The value of H 2 /4H 1 was lower than maximum value (0.25) for all of traits, which arises when U = V = 0.5 over all loci. The proportion ͌ʳʲ 4DH1 ʲʲ + F ʲ/͌ʳʲ 4DH1 ʲʲ -F ʲ) confirmed by half of the traits that dominant alleles were in excess as compared to recessive alleles. Dominance effects (h 2 ) for most of the traits suggested that substantial contribution of dominance was not due to heterogeneity of loci in these parameters. Broad and narrow sense heritabilities were high for most of the traits. Correlation coefficient between the Wr + Vr and mid parental (y) indicated that dominant genes were responsible for increased sympodia, lint % and yield, and recessive genes increased monopodia and plant height. Genetic gain was encouraging for most traits. Cultivar CIM-1100 was identified by genetic advancement as a promising parental cultivar to cross combinations.Additional key words: additive-dominance model; additive and dominance effects; D, H 1 & H 2 genetic components of variance; seed cotton yield; upland cotton. ResumenEfectos genéticos en caracteres morfológicos y de rendimiento en algodón (Gossypium hirsutum L.)Se estudió la naturaleza y la magnitud de los efectos genéticos sobre los caracteres morfo-productivos en un cruce dialélico F 1 y F 2 de 6 × 6 en algodón tipo upland. Para la mayoría de los caracteres, excepto altura de planta y rendimiento de semilla, fue adecuado un modelo aditivo-dominante. Se estimaron los parámetros genéticos según Hayman y Mather. Los efectos aditivos controlaron el porcentaje de pelusa y los monopodios en ambas generaciones, y la altura de la planta y los simpodios en la F 2 . La herencia no aditiva con superdominancia controló el rendimiento en ambas generaciones y la altura de planta y los simpodios en la F 1 . La mayoría de los caracteres presentaron una proporción desigual de alelos positivos (U) y negativos (V) en los loci (H 2 < H 1 ) y una distribución asimétrica de los genes en los parentales (H 2 /4H 1 < 0,25 y F 0). El valor de H 2 /4H 1 estuvo por debajo del valor máximo (0,25) para todos los caracteres, lo que surge cuando U = V = 0,5 en todos los loci. La proporción ͌ʳʲ 4DH1 ʲʲ + F ʲ/͌ʳʲ 4DH1 ʲʲ -F ʲ) confirmó, para la mitad de los caracteres, que había un exc...

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Genetic effects on morphological and yield traits in cotton (Gossypium hirsutum L.)

Khan¹,

Hassan²

1970

Span. j. agric. res.

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“…The quadratic components shown in Table 1 (2007) and Hinze et al (2011). For SFI, similar results were obtained by Aguiar et al (2007) and Zeng et al (2011). Regarding SPI, results are supported by Aguiar et al (2007), which observed the predominance of additive effects in the control of fiber spinning in upland cotton genotypes.…”

Section: Combining Abilitiessupporting

confidence: 68%

Research Article Diallel analysis for technological traits in upland cotton.

et al. 2017

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ABSTRACT.Final cotton quality is of great importance, and it depends on intrinsic and extrinsic fiber characteristics. The objective of this study was to estimate general (GCA) and specific (SCA) combining abilities for technological fiber traits among six upland cotton genotypes and their fifteen hybrid combinations, as well as to determine the effective genetic effects in controlling the traits evaluated. Patos, PB, Brazil. The experimental design was a randomized block with three replications. Technological fiber traits evaluated were: length (mm); strength (gf/tex); fineness (Micronaire index); uniformity (%); short fiber index (%), and spinning index. The diallel analysis was carried out according to the methodology proposed by Griffing, using method II and model I. Significant differences were detected between the treatments and combining abilities (GCA and SCA), indicating the variability of the study material. There was a predominance of additive effects for the genetic control of all traits. TAM B 139-17 presented the best GCA estimates for all traits. The best combinations were: FM 993 x TAM B 139-17, CNPA 04-2080 x PSC 355, FM 993 x TAMCOT-CAMD-E, PSC 355 x TAM B 139-17, and TAM B 139-17 x TAMCOT-CAMD-E, by obtaining the best estimates of SCA, with one of the parents having favorable estimates for GCA.

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“…'BRS 293' was originated from crosses between Stoneville 132 (a widely cultivated cotton cultivar with pedigree DES 56 x TAMCOT SP37) and Delta Opal (a high-yielding cotton cultivar with pedigree DP 5816 x Sicala 33), carried out in 2000 at Randonópolis, MT. Hybrid combinations with cultivar Delta Opal are recommended for the improvement of seedcotton yield, lint yield, seed index, index of production, and earliness (Aguiar et al, 2007 40.5 to 42.5%; micronaire reading ranged from 3.9 to 4.5; fiber length (SL 2.5%) from 28.5 to 30.5 mm; relative strength from 28.3 to 32.9 gf tex -1 ; reflectance from 72 and 82%; yellowness (+b) from 6.5 to 10.0; short fiber index from 3.9 to 6.3; spinning consistency index from 140 to 160; the fiber spin character could be defined as very good (Table.2).…”

Section: Genetic Origin and Developmentmentioning

confidence: 99%