Genetic variability, character association and divergence studies in sunflower (Helianthus annuus L.) for improvement in oil yield

Lakshman, Shyam Sundar; Chakraborty, Nirman; Debnath, Sandip; Kant, Achal

doi:10.33472/afjbs.3.1.2021.129-145

Cited by 4 publications

(14 citation statements)

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“…Head diameter, with a negative direct effect of -0.154, had an adverse influence on seed yield per plant (0.601). These findings are consistent with the results reported by Abdelsatar et al [22] and Lakshman et al [16]. Moreover, head diameter exhibited a positive in direct effect on seed yield per plant through test weight (0.380), the number of seeds per head (0.333) and volume weight (0.120).…”

Section: Resultssupporting

confidence: 92%

“…High heritability estimates were observed for all the characters studied. These results are in confirmatory with the findings of Supriya et al [12], Varalakshmi et al [11] and Shyam et al [14]. This indicated that these characters were least influenced by the environment and generally, selection based on phenotypic observation would be effective.…”

Section: Resultssupporting

confidence: 91%

“…Furthermore, this particular trait demonstrated a positive in direct effect on seed yield per plant through test weight (0.304), volume weight (0.149) and the number of seeds per head (0.243). However, it displayed a negative in direct effect through head diameter (-0.078) and oil content (-0.021), findings that are in line with the results from studies conducted by Sowmya et al [23], Lakshman et al [24] and Shyam et al [14]. This indicates that seed filling per cent has a negative direct effect on seed yield per plant and it has a positive in direct effect on seed yield via test weight, volume weight and the number of seeds per head.…”

Section: Resultssupporting

confidence: 90%

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Assessment of Genetic Variability and Character Associations in Sunflower (Helianthus annuus L.) Yield Related Traits

Mariyam,

Kulkarni,

Sujatha

et al. 2024

AJSSPN

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Aims: To investigate yield and yield related characteristics for variability and association studies in fifty-two powdery mildew differentials of sunflower. Study Design: Augmented block design. Place and Duration of Study: Main agricultural Research station, University of Agricultural Science, Raichur, Karnataka between November 2022 and February 2023. Methodology: Study included 52 powdery mildew differentials of sunflower studied factors such as genetic variability, heritability, and genetic advance in characters such as head diameter, seed filling percent, test weight, number of seeds per head, volume weight, oil content and seed yield. Correlation and path analysis was also done. Results: Findings revealed significant differences among the traits, especially in seed yield per plant, head diameter, seed filling percent, test weight, and number of seeds per head which conclude that there is variability present in the studied character and there is scope for crop improvement. Correlation coefficients showed positive connections between seed yield per plant and traits like head diameter, test weight, seed filling percentage, and number of seeds per head. However, volume weight had a negative correlation. Path coefficient analysis helped us understand the direct and indirect impacts of these traits on seed yield per plant. Head diameter, seed filling percentage, test weight, and number of seeds per head had positive direct effects on seed yield per plant. In contrast, volume weight had a negative direct effect. Conclusion: The study contributes to the understanding of the genetic architecture of sunflower traits related to yield and provides a foundation for developing targeted breeding strategies. These insights can guide sunflower breeding programs in selecting traits for improved yield.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 90%

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Assessment of Genetic Variability and Character Associations in Sunflower (Helianthus annuus L.) Yield Related Traits

Mariyam,

Kulkarni,

Sujatha

et al. 2024

AJSSPN

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“…Path co-efficient analysis of different yield component traits contributing toward seed yield per plant showed that plant height (0.2961) had the highest positive direct effect followed by oil content (0.1554), head diameter (0.1451), 100-seed weight (0.1016), days to 50 per cent flowering (0.0678), days to maturity (0.0666) and volume weight (0.0355). These findings are in confirmation with the earlier findings of Sowmya et al (2010), Basha (2020) and Lakshman et al (2021). The phenotypic path co-efficient analysis using eight quantitative characters resulted in a residual effect of 0.358.…”

Section: Resultssupporting

confidence: 91%

“…Correlation studies on seed yield and component characters indicated a highly significant positive association of seed yield with plant height (0.442) followed by head diameter (0.411) indicating the importance of these two traits in improving seed yield and suggesting the selection of crosses based on these two traits for improvement in sunflower yield. The results are similar with findings ofSowmya et al (2010),Sincik and Goksoy (2014), Abu (2019) andLakshman et al (2021).…”

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confidence: 92%

Character association and identification of trait specific introgression in restorer lines of sunflower (Helianthus annuus L.)

2022

EJPB

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The study was carried out involving 40 MAGIC crosses of sunflower restorer lines along with 10 parental checks during rabi, 2020 grown in augmented block design with four blocks at MARS, UAS Raichur with an objective of assessing variation and character association for yield attributing traits. The highest estimates of GCV, PCV, heritability and genetic advance as per cent of mean were recorded for seed yield per plant followed by 100-seed weight. Seed yield per plant recorded a highly significant positive association with plant height and head diameter. Path analysis studies indicated plant height had the highest positive direct effect on seed yield per plant followed by oil content. Trait specific introgression studies revealed that R-127-1 × RⅡ, CSFI-99 × RⅢ and No-30 × RⅣ showed the highest percentage (87.5%) of introgression with the expression of seven out of eight traits.

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The Assessment of Morphological Diversity of Colchicum luteum L., an Economically Important Threatened Medicinal Plant of Kashmir Himalaya

et al. 2022

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Colchicum luteum L. is an economically important and endangered medicinal plant of the Kashmir Himalaya. The corm extract is used for the treatment of rheumatism, gout, Behcet’s syndrome, and Alzheimer disease. It is also used extensively in plant breeding programs for the doubling of chromosomes. The present study was carried out for two years (2017–2019) to study the genetic diversity of C. luteum, an economically important and endangered medicinal plant of Kashmir Himalaya. The mapping of genetic diversity of C. luteum was estimated using Mahalanobis D2 analysis in the Aharbal (Kulgam), Dhara (Theed), and Baera Baal Hills (Harwan) of Kashmir Valley. The results showed the presence of 5 clusters for 30 populations. There were 17 populations in cluster-1, 1 in cluster-2, 2 in cluster-3, 3 in cluster-4, and 7 in cluster-5. The majority of the population was a group in cluster-1 followed by cluster-5. The maximum intracluster distance (D2 values) was observed in cluster-5 (46.55588) followed by cluster-3 (41.61871), and the maximum inter-cluster distance (D2 values) was observed in cluster-3 (46.55588) followed by cluster-5 (41.61871). Our study revealed that plant species possessed sufficient genetic diversity among the populations. Cluster-5 showed superiority in plant−1 respect of the maximum mean plant height (28.46 cm), leaf area (47.0 cm2), number of seeds plant−1 (26.85), corm length (5.15 cm), corm width (3.17 cm), fresh weight of corm plant (6.87 g), and dry weight of corm plant (4.81 g) as compared to other clusters. Out of five clusters, cluster-5 is a promising one for better yield and yield attributing traits. The present study revealed that plant species possessed sufficient genetic diversity among the populations as 30 populations were arranged into 5 clusters. Therefore, cluster-5, consisting of seven populations from the undisturbed area of Harwan, and consequently the populations from the same cluster can be multiplied for initiating a conservation and breeding program and can serve as a tool for the scientific community to evolve better contemporary varieties of C. luteum with profitable characters such as more yield of corms, etc. This will assist farmers, particularly the marginal farmers, to alleviate their income.

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Genetic variability, character association and divergence studies in sunflower (Helianthus annuus L.) for improvement in oil yield

Cited by 4 publications

References 0 publications

Assessment of Genetic Variability and Character Associations in Sunflower (Helianthus annuus L.) Yield Related Traits

Assessment of Genetic Variability and Character Associations in Sunflower (Helianthus annuus L.) Yield Related Traits

Character association and identification of trait specific introgression in restorer lines of sunflower (Helianthus annuus L.)

The Assessment of Morphological Diversity of Colchicum luteum L., an Economically Important Threatened Medicinal Plant of Kashmir Himalaya

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