Salinity indices and path analysis in Egyptian long-staple cotton cultivars

Mahdy, E.E.; Mahrous, H.; Sayed, Mohammed; Housein, Maisaa

doi:10.21608/svuijas.2021.94700.1140

Cited by 3 publications

(3 citation statements)

References 25 publications

(32 reference statements)

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“…Strikingly, the largest direct effect of SCY on the dependent variable LCY in this study implied that SCY could be used as marker to improve LCY through direct selection process. These findings were in line with recent investigations [ 100 , 101 ]. Furthermore, NBP showed the highest positive indirect contribution to lint cotton yield through SCY, followed by LI through SI, BW through SI which pinpoints the importance of these traits due to their indirect vital role on improvement of LCY.…”

Section: Discussionsupporting

confidence: 94%

Genetic analysis of yield traits in Egyptian cotton crosses (Gossypium barbdense L.) under normal conditions

et al. 2022

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To generate high-yielding cultivars with favorable fiber quality traits, cotton breeders can use information about combining ability and gene activity within a population to locate elite parents and potential F1 crosses. To this end, in the current study, twelve cotton parents (eight genotypes as female parents and four testers) and their F1 crosses obtained utilizing the linex tester mating design were evaluated for their general and specialized combining abilities (GCA and SCA, respectively) of yield traits. The findings showed that for all the investigated variables, variances owing to genotypes, parents, crosses, and parent vs cross showed extremely significant (P ≤ 0.01) differences. Additionally, throughout the course of two growing seasons, the mean squares for genotypes (parents and crosses) showed strong significance for all the variables under study. The greatest and most desired means for all the examined qualities were in the parent G.94, Pima S6, and tester G.86. The best crossings for the qualities examined were G.86 (G.89 × G.86), G.93 × Suvin, and G.86 × Suvin. The parents' Suvin, G89x G86 and TNB were shown to have the most desired general combining ability effects for seed cotton yield/plant, lint yield/plant, boll weight, number of bolls/plants, and lint index, while Suvin, G.96 and pima S6 were preferred for favored lint percentage. For seed cotton yield, lint percentage, boll weight, and number of bolls per plant per year, the cross-G.86 x (G.89 × G.86) displayed highly significant specific combining ability impacts. The crosses G.86 × Suvin, Kar x TNB, G.93 × Suvin, and G.93 × TNB for all the studied traits for each year and their combined were found to have highly significant positive heterotic effects relative to better parent, and they could be used in future cotton breeding programs for improving the studied traits.

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Section: Discussionsupporting

confidence: 94%

Genetic analysis of yield traits in Egyptian cotton crosses (Gossypium barbdense L.) under normal conditions

et al. 2022

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“…The prevalence of saline/sodic soils depends on two types of factors, namely, climatic factors and geomorphologic factors. Saline lands are found in regions with a continental climate or where droughts prevail, which leads to increased evaporation and salt accumulation [58][59][60]. Saline/sodic soils also spread in the lands of lakes, rivers, and sedimentary valleys, and abound in dry and semi-arid areas with little rain and high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Estimation of Saline-Soil Amelioration Using Remote-Sensing Indices in Arid Land for Better Management

Aboelsoud

AbdelRahman

Kheir

et al. 2022

Land

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Soil salinity and sodicity are significant issues worldwide. In particular, they represent the most dominant types of degraded lands, especially in arid and semi-arid regions with minimal rainfall. Furthermore, in these areas, human activities mainly contribute to increasing the degree of soil salinity, especially in dry areas. This study developed a model for mapping soil salinity and sodicity using remote sensing and geographic information systems (GIS). It also provided salinity management techniques (leaching and gypsum requirements) to ameliorate soil and improve crop productivity. The model results showed a high correlation between the soil electrical conductivity (ECe) and remote-sensing spectral indices SIA, SI3, VSSI, and SI9 (R2 = 0.90, 0.89, 0.87, and 0.83), respectively. In contrast, it showed a low correlation between ECe and SI5 (R2 = 0.21). The salt-affected soils in the study area cover about 56% of cultivated land, of which the spatial distribution of different soil salinity levels ranged from low soil salinity of 44% of the salinized cultivated land, moderate soil salinity of 27% of salinized cultivated land, high soil salinity of 29% of the salinized cultivated land, and extreme soil salinity of 1% of the salinized cultivated land. The leaching water requirement (LR) depths ranged from 0.1 to 0.30 m ha−1, while the gypsum requirement (GR) ranged from 0.1 to 9 ton ha−1.

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“…The drought stress significantly affects many agronomic traits and seed cotton yield (Zhang et al, 2012). In G.barbadence drought stress reduced seed cotton yield by 31.44 to 42% (Mohamed et al, 2009;Veesar et al, 2018;Mahdy et al, 2021). The best way to resist drought is to develop new varieties that can better withstand water deficit.…”

Section: Introductionmentioning

confidence: 99%

Genetic Analysis of Yield and Fiber Traits in Cotton (Gossypium barbadense L.) under Normal Irrigation and Drought Stress Conditions

et al. 2022

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D ROUGHT stress is a serious abiotic stress affecting crop production in Egypt. The aim of this article was to study the gene action controlled seed cotton yield (SCY/P) and fiber properties under normal irrigation and water deficit conditions. Ten cotton genotypes (G. barbadence L.) were crossed as lines to three as testers. The parents and hybrids were evaluated in a randomized complete block design with three replications under normal and water deficit at the Agriculture Research Center, Sohag Governorate, Egypt. The two hybrids [G95 ˟ (G90 ˟ Aust.)] and [Aust. ˟ (G90 ˟ Aust.)] were the best hybrids for most studied traits and should be considered in breeding program for drought stress and normal irrigation, and the parents G.95, (G95 ˟ Aust.) and Aust. depicted their good combining ability. Mean reduction % of the parents varied greatly from 2.99 for lint % to 31.79 for SCY/P, while it varied for the hybrids from 5.11 for fiber strength to 33.93 for SCY/P. The additive (σ 2 A) and the dominance variance (σ 2 D) were larger under normal irrigation than under water stress conditions for most traits. The ratio σ 2 A/σ 2 D was less than unity for all traits indicating that the role of dominance was more important than additive effects in the inheritance of these traits. The contribution of lines was larger than that of testers and lines x testers interaction in most traits at both environments indicating the importance of selection of lines for hybridization, and selection should be delayed to later generations.

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Salinity indices and path analysis in Egyptian long-staple cotton cultivars

Cited by 3 publications

References 25 publications

Genetic analysis of yield traits in Egyptian cotton crosses (Gossypium barbdense L.) under normal conditions

Genetic analysis of yield traits in Egyptian cotton crosses (Gossypium barbdense L.) under normal conditions

Quantitative Estimation of Saline-Soil Amelioration Using Remote-Sensing Indices in Arid Land for Better Management

Genetic Analysis of Yield and Fiber Traits in Cotton (Gossypium barbadense L.) under Normal Irrigation and Drought Stress Conditions

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