Genetic variability, evaluation and characterization of sunflower (Helianthus annuus L.) germplasm

Abstract

Fifty accessions of sunflower germplasm were characterized and evaluated for seed yield and its components traits to study the variability present among different germplasm lines. Significant amount of genetic variability was observed for all the characters under study. Seed yield and hull content were identified for highest genotypic (27.08 and 20.14%, respectively) and phenotypic coefficients of variation (27.89 and 20.64%, respectively) and also for high heritability (97.46 and 97.28%, respectively) coupled with high genetic advance (52.19 and 40.49%, respectively) over mean followed by duration of reproductive phase, oil content, 100-seed weight and plant height. Qualitative traits also showed wide variation among the accessions. Majority of the accessions were early in flowering, medium in maturity and medium in head diameter. Among all the accessions, ten lines were observed with short height and ten lines showed high oil content (> 40%). Maximum genetic distance was observed between the accessions EC-601800 and EC- 512687 and utilization of these accessions has been advocated in breeding programme. The results of the present study can be useful for the formation of data base and reference lines, genotype identification and will also be helpful in amplification of future sunflower improvement programme.

Estimation of Genetic Parameters in Sunflower (Helianthus annuus L.) Germplasm Lines for Yield and Its Contributing Traits

“…The estimates of phenotypic and genotypic coefficients of variation were low for oil content (6.50/4.74), days to 50 % flowering (6.20/5.33) and days to maturity (3.91/3.49). These findings are in accordance with those of Dudhe et al [8] and Sree et al [9] for oil content and days to 50 % flowering and Singh et al [10] and Abu [11] for days to maturity. Whereas, phenotypic and genotypic coefficients of variation were moderate for 100seed weight (15.15/12.92), plant height (14.97/14.01), head diameter (14.30/11.28) and volume weight (11.26/10.38).…”

“…Whereas, phenotypic and genotypic coefficients of variation were moderate for 100seed weight (15.15/12.92), plant height (14.97/14.01), head diameter (14.30/11.28) and volume weight (11.26/10.38). Similar results were reported by Baraiya et al [12] and Singh et al [10] for 100-seed weight and plant height and Sree et al [9] for head diameter.…”

Genetic variability, evaluation and multivariate analysis for yield and yield components in sunflower (Helianthus annuus L.)

“…(Table 5and figure1) Very high values of PCV and GCV were obtained for seed yield plant -1 (8.79 and 8.34%), 100-seed weight (4.87 and 4.53%) and stem diameter (4.81 and 4.41%), which indicates significant role of these characters in the improvement of breeding programmes. Similar results were obtained by (Reddy and Reddy 2006) [29] , (Kalukhe et al 2010) [14] and (Vivek et al 2019) [37] . Moderate levels of PCV and GCV were obtained for the plant height and oil% in the decreasing order of magnitude.…”

KERAGAMAN EMPAT AKSESI BUNGA MATAHARI (Helianthus annuus L.) MENGGUNAKAN PENANDA MORFOLOGI

“…Klasifikasi plasma nutfah berdasarkan karakter agronomi memainkan peran penting dalam pemuliaan tanaman untuk memilih sumber daya genetik yang berharga yang akan digunakan dalam program pemuliaan (Singh et al, 2019). Karakterisasi morfologi adalah langkah penting untuk pemanfaatan plasma nutfah secara efektif (Santos et al, 2012).…”