Response of cotton genotypes to the incidence of Alternaria leaf spot

Cia, Edivaldo; Fuzatto, Milton Geraldo; Kondo, Julio Isao; Carvalho, Luiz Henrique; Ito, Margarida Fumiko; Dias, Fábio Luís Ferreira; Gallo, Paulo Boller

doi:10.1590/0100-5405/2119

Cited by 9 publications

(5 citation statements)

References 6 publications

(3 reference statements)

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“…In this study and also previous studies (Hosagoudar 2007;Anil 2013;Cia et al, 2016), none of the cotton genotypes were identified as immune to Alternaria leaf blight whereas several Pima cotton cultivars were evaluated for resistance to Alternaria leaf blight, based on disease severity rating, lesion size and numbers and Pima was found to be more susceptible (Zhu et al, 2018). Similarly, Chattannavar et al (2009b) screened 196 cotton cultivars under field conditions for resistance to Alternaria blight during the kharif season of June 2007.…”

Section: Resultssupporting

confidence: 88%

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Rajesha¹,

Nakkeeran²,

Indumathi³

et al. 2021

JEB

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Aim: To identify the resistant source present in the breeding materials against Alternaria leaf blight disease of cotton (Gossypium spp.). Methodology: Breeding entries were sown in a randomized complete block design in the experimental site. Disease intensity on each genotype at 45, 90, 135 and 180 days after sowing (DAS) were recorded from leaves of lower, middle and upper parts of plants and graded. According to 0 - 4 disease scoring scale, per cent disease index (PDI) was calculated and genotypes were categorized into different categories based on disease reaction Results: Development of Alternaria disease was noticed at early days of crop growth in few genotypes and the disease increased upto 135 days after sowing. The maximum mean per cent disease index of 41.17 and 40.06 were recorded in Br.14a (ZT)1333 and Br.14a (ZT)1332 respectively. The least PDI of 0.58 was recorded in Br.03a (ZT)1303. Disease incidence of <11.00% of was reported in 37 entries at 45 days after sowing. None of the genotypes showed apparently immune reaction, twenty-one genotypes showed resistant reaction, eleven genotypes were moderately resistant and five showed moderately susceptible reaction. Interpretation: Twenty-one breeding lines showed resistant reaction against Alternaria leaf blight disease under field conditions, however, further utilization of these lines may be carried out in breeding programmes for the development of resistant source against this disease.

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Section: Resultssupporting

confidence: 88%

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Rajesha¹,

Nakkeeran²,

Indumathi³

et al. 2021

JEB

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“…Twenty F 1 hybrid combinations generated from partial diallel crossing were used for this study using two parents groups: GI -formed by five cultivars with high fiber yield (Cia et al 2014, Carvalho et al 2015, Coutinho et al 2015, Zonta et al 2016) and GII -composed of by four drought tolerance cultivars (Freire et al 1999, Vidal Neto andFreire 2013). These cultivars are inbred lines developed by Brazilian Company of Agricultural Research (Embrapa), Bayer and Mato Grosso Foundation (FMT) ( Table 1).…”

Section: Methodsmentioning

confidence: 99%

Diallel analysis in cotton (Gossypium hirsutum L.) for water stress tolerance

Vasconcelos

Cavalcanti

Farias

et al. 2018

Crop Breed. Appl. Biotechnol.

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“…Twenty full-sib F 1 hybrid combinations from a partial diallel cross were used. The cultivars used as parents were divided into two groups (Table 1): GI, formed by five cultivars with high fiber yield (Cia et al, 2014;Carvalho et al, 2015;Coutinho et al, 2015;Zonta et al, 2016); and GII, formed by four cultivars adapted to the Semiarid region of Northeast of Brazil, except CNPA-ITA-90, which is tolerant to water stress in the Cerrado region of Brazil (Freire et al, 1999;Vidal Neto & Freire, 2013).…”

Section: Methodsmentioning

confidence: 99%

Estimates of genetic parameters in diallelic populations of cotton subjected to water stress

Vasconcelos

Santos

Vasconcelos

et al. 2020

Rev. bras. eng. agríc. ambient.

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The objective of this study was to estimate the general combining ability (GCA) and specific combining ability (SCA) of cotton genotypes subjected to water stress, based on fiber quality traits. Irrigated cotton plants were grown in the dry season in the Northeast region of Brazil and subjected to 23 days without irrigation at the beginning of the flowering stage. GCA and SCA analyses were based on the partial diallel model. Significant differences were found for GCA for all traits, with predominance of additive effects. The crossing between the genotypes FM-966 and CNPA-5M was the most promising hybrid combination, showing great potential for improvements in fiber quality in environments subjected to water stress, such as the Semiarid region of the Northeast of Brazil.

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Response of cotton genotypes to the incidence of Alternaria leaf spot

Cited by 9 publications

References 6 publications

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Diallel analysis in cotton (Gossypium hirsutum L.) for water stress tolerance

Estimates of genetic parameters in diallelic populations of cotton subjected to water stress

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