Heterosis and Inbreeding Depression for Seed Cotton Yield and Yield Attributing Traits in Intrahirsutum (G. hirsutum L. X G. hirsutum L.) Hybrids of Cotton

Tigga, Aman; Patil, S. S.; Edke, Vinayak; Roy, Utpal; Kumar, Ashutosh

doi:10.20546/ijcmas.2017.610.339

Cited by 5 publications

(12 citation statements)

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“…For the other traits, there was difference between the means of the F 1 and F 2 generations, which indicates that at least one cross expressed inbreeding depression. These results are in accordance with those obtained by Soomor and Kalhoro (2000), Khan et al (2007;2009), Lukonge et al (2008) and Tigga et al (2017), who reported more pronounced inbreeding depression in agronomic traits of cotton plants.…”

Section: Means Grouping Between Both Generationssupporting

confidence: 93%

“…Mean values of the traits percentage of fibers (PF), weight of one boll (P1C) fiber length (UHM), fiber uniformity (UNIF), short fiber index (SFI), fiber strength (STR), and micronaire index (MIC), evaluated in six cotton crosses, in the F 1 and F 2 generation. (2001), Soomor and Kalhoro (2000), Khan et al (2007), Khan et al (2009) and Tigga et al (2017). The hybrids FM 966 × CNPA 7MH and FM 966 × BRS 286 had the lowest estimates of inbreeding depression for most of the traits.…”

Section: Means Grouping Between Both Generationsmentioning

confidence: 93%

“…Khan et al (2009) reported that the decrease in the mean of the best hybrids from the F 1 generation to the F 2 generation is due to inbreeding depression and segregation. Coyle and Smith (1997), Soomor and Kalhoro (2000), Khan et al (2007) and Tigga et al (2017) observed that the F 1 hybrids with high heterosis were also those associated with high inbreeding depression.…”

Section: Combining Abilitymentioning

confidence: 96%

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Diallel analysis and inbreeding depression in agronomic and technological traits of cotton genotypes

et al. 2018

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index. The additive genetic effects are predominant in the evaluated agronomic and fiber quality traits. Cultivar FM 966 is the most suitable parent to compose crossing blocks for the improvement of cotton agronomic and fiber quality traits. The hybrids FM 966 × CNPA 7MH and FM 966 × BRS 286 are the most promising for obtaining segregating populations aiming to select superior genotypes. Inbreeding depression is more pronounced in the agronomic traits than in the fiber quality traits.

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Section: Means Grouping Between Both Generationssupporting

confidence: 93%

Section: Means Grouping Between Both Generationsmentioning

confidence: 93%

Section: Combining Abilitymentioning

confidence: 96%

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Diallel analysis and inbreeding depression in agronomic and technological traits of cotton genotypes

et al. 2018

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“…The estimates of inbreeding depression were significant and positive in all crosses. Similar results were also quoted by Rauf et al (2005) [22] , Panni et al (2012) [16] , Ranganatha et al (2013) [20] , Patel et al (2014) [17] , Sawarkar et al (2015) [23] , Gohil et al (2017) [9] , Isong et al (2017) [11] , Monicashree et al (2017) [15] , Tigga et al (2017) [26] and Rathava et al (2018) [21] . The magnitudes of relative heterosis as well as heterobeltiosis were significant and positive only in cross III for monopodia per plant.…”

Section: Methodssupporting

confidence: 77%

“…(2017) [11] , Khan et al (2017) [14] , Monicashree et al (2017) [15] , Tigga et al (2017) [26] , Rathava et al (2018) [21] , Yehia and Hashash (2019) [27] and AL-Hibbiny et al (2020) [4] . In case of days to flowering cross IV depicted significant and positive heterobeltiosis.…”

Section: Methodsmentioning

confidence: 99%

Heterosis and inbreeding studies for seed cotton yield and its component traits in desi cotton

Patel¹,

Vadodariya²,

Bhati³

et al. 2021

Int. J. Chem. Stud.

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A study was conducted to assess the extent of the heterosis for sixteen yield and yield-attributing traits in four cotton hybrids (each having P1, P2, F1, F2, BC1 and BC2 generations) obtained by crossing four interspecific lines of desi cotton in a compact family block design with three replications during kharif 2017-18. Highly significant and positive relative heterosis, heterobeltiosis and inbreeding depression were recorded in most of the crosses. For seed cotton yield per plant, positive and highly significant relative heterosis, heterobeltiosis and inbreeding depression were recorded in all the four crosses indicated major role of non-additive gene actions in the inheritance of seed cotton yield per plant and its attributes, while cross III (GShv 362/12 x PA 812) recorded the highest heterotic effect among all crosses which also performed well for monopodia per plant, average boll weight, lint yield per plant, ginning percentage, lint index, fibre fineness and fibre strength.

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Farmers' Production Practices, Incidence and Management of Pests and Diseases, Extension Services, and Factors Limiting Cotton Production and Quality in South Africa

Malinga,

Laing

2023

S Afr. Jnl. Agric. Ext.

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Cotton is one of the essential cash crops; however, several factors, such as low yields and pest and disease infestations, affect the production. In South Africa, cotton production has increased among small-scale farmers since the late 1990s. Although the crop is not new to South African farmers, no recent information reflects the current status of cotton production practices. A study evaluated farmers' production practices, the incidence and management of pests and diseases, extension services, and factors limiting cotton production and quality in South Africa. One hundred and forty farmers, mainly smallholder farmers, were interviewed during the 2017/18 growing season. Most farmers planted genetically modified (GM) cotton on less than 5 ha of cotton, with 96% planting under dryland. Most farmers neither practised conservation agriculture (95%) nor conducted soil analyses (87%). A mean cottonseed yield of 700 kg ha-1 was reported on dryland cotton, and 5 000 kg ha-1 was obtained from irrigated cotton. Most of the farmers (99%) harvested their cotton by handpicking. Farmers' pest knowledge was higher than their knowledge of different diseases. Most participants were unaware of nematodes (88%) or disease-resistant cultivars (74%), while 91% were aware of insect-resistant cultivars. Extension officers only mentored and supported many respondents (82%). Most farmers (93%) relied on pesticides to control cotton pests, and the rest (7%) used biological control. Climatic conditions (98%), labour costs (88%), and insect infestations (42%) were identified as the main constraints in cotton production. Although this study had a limited number of surveyed farmers, it gives some insight into their knowledge and challenges.

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Heterosis and Inbreeding Depression for Seed Cotton Yield and Yield Attributing Traits in Intrahirsutum (G. hirsutum L. X G. hirsutum L.) Hybrids of Cotton

Cited by 5 publications

References 0 publications

Diallel analysis and inbreeding depression in agronomic and technological traits of cotton genotypes

Diallel analysis and inbreeding depression in agronomic and technological traits of cotton genotypes

Heterosis and inbreeding studies for seed cotton yield and its component traits in desi cotton

Farmers' Production Practices, Incidence and Management of Pests and Diseases, Extension Services, and Factors Limiting Cotton Production and Quality in South Africa

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