Evaluation of sunflower (<i>Helianthus annuus</i> L.) single cross hybrids under heat stress condition

Khan, Maria; Rauf, Saeed; Munir, Hassan; Kausar, Maria; Hussain, M.; Ashraf, Ejaz

doi:10.1080/03650340.2016.1224335

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…Tahir and Mehdi (2001) 3). These results are in agreement with those reported by Khan et al (2017). 4), and significantly (P<0.01) higher at loamy sand soil than at clay soil (Table 3), indicating to the effect of soil type on husk %.…”

Section: -2 Plant Heightsupporting

confidence: 93%

“…The genotypes by environment interaction was significant (P<0.05) for days to 50% flowering and significant (P<0.01) for the other traits, indicating the differential responses of genotypes to the two environments. Javed and Aslam (1995), Jan et al (2005), Kumar et al (2014) and Khan et al (2017) found significant mean squares for genotypes environment (drought, locations or salinity) their interaction for SY/P, HD, oil %, days to maturity and 100-seed weight. 53.25, and 53.67 for F 1 -hybrids, females and males; respectively with an overall mean of 52.92 (Table 4).…”

Section: Resultsmentioning

confidence: 92%

“…Genetic variability provides the breeder good opportunity to select high yielding genotypes. Mean squares of the evaluated genotypes was significant for seed yield, oil yield and most traits (Javed and Aslam, 1995;Jan et al, 2005;Tahir and Mehdi, 2001;Dudhe et al, 2017 andKhan et al, 2017). Egypt faces shortage in irrigation water especially in new reclaimed soil.…”

Section: Introductionmentioning

confidence: 96%

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Evaluation of Sunflower Genotypes Under Loamy Sand and Clay Soil Conditions

2018

Minia Journal of Agricultural Research and Development

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Twenty-six genotypes of sunflower (16 F 1 -hybrids, four female lines, four restorer lines and two check varieties; Sakha 53 and Giza 102) were evaluated under two contrasting environments, i.e., loamy sand soil at A.R.C., Arab El-Awamer Res. Stn., and clay soil at Assiut Univ. Exper. Farm in season 2016. Genotypes mean squares of 13 studied traits was significant (P<0.01) either in the separate or in the combined analysis. The differences between the two environments were significant for all traits except head diameter (HD). The genotype x environment interaction was significant for all traits, indicating differential responses of genotypes to the two environments. The F 1 -hybrids, females and males were earlier than the two checks in days to 50% flowering. The fertile clay soil delayed days to 50% flowering than loamy sand soil. The phenotypic (PCV%) and genotypic (GCV%) coefficients of variability were low, and heritability in broad sense was intermediate (43.17%) for days to 50% flowering. The combined analysis of plant height showed high PCV (13.58%), GCV (11.81%) and heritability (75.58%). The GCV of head diameter was high and reached 15.95, 14.41 and 11.84% at loamy sand, clay soil and combined analysis; respectively. Stalk diameter was larger at clay than at loamy sand soil, and heritability estimates were 74.19, 77.05 and 66.67% at loamy sand, clay soil and combined analysis; respectively. Four of the F 1 -hybrids was heavier in 100-seed weight than the checks. The GCV and heritability estimates were high for 100-seed weight. Husk % and husk; g of 100 seeds tended to be higher Ezzat E. Mahdy et al., 2018 -30 -at loamy sand than at clay soil. The combined means of oil % showed that five hybrids significantly exceeded the better check Giza 102. Oil % was higher at loamy sand than at clay soil. Heritability estimates of oil % were high at both locations (97.86 and 86.25%) and very low (5.69%) from the combined analysis, because of the large mean squares of GxE interaction. Kernel weight in 100 seeds was higher at loamy sand than at clay soil. The GCV and heritability estimates were high for kernel weight. Number of seeds/head was higher at clay soil than at loamy sand. Three F 1 -hybrids significantly exceeded Sakha53in kernel weight from the combined data. The GCV and heritability estimates were high for NS/H. Seed yield/head and oil yield/head were higher at loamy sand than at clay soil, and four F 1 -hybrids were significantly better than the check. High estimates of GCV and heritability were high for NS/H. The GCV estimates in seed yield were 43.48, 39.33 and 33.57%, and heritability were 98.85, 96.67 and 75.22% at loamy sand, clay soil and combined analysis; respectively. The resulted indicated that the genetic materials should be evaluated under diverse environments to get reliable estimates of genetic parameters.

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Section: -2 Plant Heightsupporting

confidence: 93%

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 96%

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Evaluation of Sunflower Genotypes Under Loamy Sand and Clay Soil Conditions

2018

Minia Journal of Agricultural Research and Development

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“…The genotypes by environment interaction was significant (P<0.05) for days to 50% flowering and significant (P<0.01) for the other traits, indicating differential responses of genotypes to the two environments. Javed and Aslam (1995), Jan et al (2005), Kumar et al (2014) and Khan et al (2017) found significant mean squares for genotypes, environment (drought, locations or salinity) and their interaction for SY/P, HD, oil %, days to maturity and 100-seed weight. Phenotypic and genotypic correlations Phenotypic and genotypic correlations among traits at loamy sand soil, clay soil and their combined are presented in Tables 4, 5 and 6.…”

Section: Resultsmentioning

confidence: 94%

A Correlation and Path-Coefficient Analysis of Seed Yield Components of Sunflower Under Loamy Sand and Clay Soil Conditions

2018

Minia Journal of Agricultural Research and Development

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The present investigation was carried out at Fac. Agric. Exper. Farm (clay soil), and Arab Al-Awamer Res. Stn. ARC. (loamy sand soil), to study phenotypic and genotypic correlations among traits of 24 genotypes of sunflower (4 females, 4 males and 16 hybrids). Path-coefficient analysis was done for the four components of seed yield/head (number of seeds/head, husk weight of 100 seeds, oil weight of 100 seeds and kernel weight of 100 seeds) with the dependent character; seed yield/head. The analysis of variance indicated significant (P<0.01) mean squares of environments, genotypes and genotype x environment interaction for all traits. Days to 50% flowering showed low correlations with both of seed yield/head and oil yield/head at genotypic and phenotypic levels from the combined data. Genotypic and phenotypic correlations were high in magnitude between plant height, head diameter, stalk diameter, 100 seed weight, husk weight in 100 seeds, oil weight in 100 seeds, kernel weight in 100 seeds and number of seeds/head, and each of seed yield/head and oil yield/head at both sites and the combined. However, the correlations of husk % with oil and seed yield/head were negative in clay soil and the combined. The other correlations among traits at both sites and combined were discussed. The direct and indirect effects of the contributing traits of seed yield/head varied greatly from loamy sandy soil to clay soil. The breeder should evaluate the breeding materials under a variety of environments, to get reliable estimates of genetic parameters. The combined estimates of direct and indirect effects of the seed yield/head component traits at genotypic level could be ranked as husk weight followed by number of seeds/head, kernel weight and oil weight in 100 seeds.

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“…Hybrids showed higher water use efficiency in autumn season despite low yield in the season. High temperature increases evapo-transpiration of the hybrid, which peaked during reproductive phase making crop vulnerable to heat and water stress (Khan et al, 2016). Development of hybrids with reduced leaf area has been suggested to increase water use efficiency (Casadebaig et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of drought-tolerant sunflower (Helianthus annuus L.) hybrids in autumn and spring planting under semi-arid rainfed conditions

Gul

Sajid

Rauf

et al. 2021

OCL

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Global climate change is posing threats for sustainable crop production. Supra-optimal temperature and water stress are among few causes of global climate change which can cause significant damage to yield in various crop species including sunflower. Therefore, a study was initiated to develop new sunflower hybrids which may have higher seed yield and water use efficiency in current scenario of global climate change. Parental inbred lines were selected on the basis of cell membrane injury and cuticular waxes; these parental lines were used to develop various cross combinations. These cross combinations were evaluated at two locations and seasons. Some newly developed hybrids (H7, H8, H9) showed lesser days to flowering, high water use efficiency, high or comparable yield, kernel to seed% and oil contents% than high yielding commercial check Hysun.33. Water use efficiency (WUE) showed significant and high correlation with seed yield in both seasons. WUE decreased in spring season when compared with the autumn season due to high evapo-transpirational losses. General combining ability analyses showed that parental lines i.e. C.249 and RH.344 were the best combiners for water use efficiency and seed yield and may be exploited for the commercial development of drought resistant hybrids.

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Evaluation of sunflower (Helianthus annuus L.) single cross hybrids under heat stress condition

Cited by 12 publications

References 15 publications

Evaluation of Sunflower Genotypes Under Loamy Sand and Clay Soil Conditions

Evaluation of Sunflower Genotypes Under Loamy Sand and Clay Soil Conditions

A Correlation and Path-Coefficient Analysis of Seed Yield Components of Sunflower Under Loamy Sand and Clay Soil Conditions

Evaluation of drought-tolerant sunflower (Helianthus annuus L.) hybrids in autumn and spring planting under semi-arid rainfed conditions

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