HETEROSIS FOR SEED YIELD AND YIELD-RELATED TRAITS IN SUNFLOWER (HELIANTHUS ANNUUS L.)

Getting benefit from use of heterosis is the main purpose in sunflower hybrid breeding. The objectives of this study were to determine performance of sunflower varieties and to measure the vigor of sunflower hybrids. In 2022 and 2023, sunflower hybrids were evaluated for four important yield components, yield performance, standard and regular heterosis, and heterobeltiosis, in Dobroudzha Agricultural Institute- Bulgaria conditions. Based on observations in this research, seed yield of hybrids. Sunflower is one of the main agricultural crops grown in Bulgaria. Due to rapidly changing climatic conditions (drought, attack by diseases and enemies, etc.), it is necessary to study the structural components treated with different doses of organic fertilizers related to an increase in seed yield. In sunflower, seed yield and oil content are complex characteristics that are influenced by different factors that may act individually or collectively. The study of a complex of traits is a crucial approach to increase seed yield. The effectiveness of selection depends mainly on the direction and magnitude of the relationship between yields and its components. Some of the indicators related to the yield significantly affect the yield and the direct effect has a different influence. Therefore, it is necessary to study which of the signs have a greater influence than others.

KEYWORDS / КЉУЧНЕ РЕЧИ: 

Vegetation, sunflower, yeld, plant height, head diameter, heterosis

ACKNOWLEDGEMENT / ПРОЈЕКАТ:

REFERENCES / ЛИТЕРАТУРA:

• Alba, E., A. Benvenuti, R. Tuberosa, G. Vanozzi (1979). A path coefficient analysis of some yield components in sunflower. Helia, 2, 25-29.
• Andrei, El., E. Bernaveta, C. Jitareanu, (1998). Correlations among different characteristics of sunflower hybrids created an the pody- iloaiei agricultural research station. Proseedings of the 2^nd Balkan Symposium on Field Crops. Novi Sad, Yugoslavia 16-20 June 1998, vol.1, 373-377.
• Dagustu, N. (2002). Correlations and path coefficient analysis of seed yield components in sunflower (Helianthus annuus L.). Turk. J. Field Crops 7(1):15-19.299.
• Dusanic, N., V. Miklic, J. Joksimovic, J. Atlagic (2004). Path coefficient analysis of some yieldcomponents of sunflower. Proc. 16th Int. Sunf. Conf., Fargo, North Dakota, USA II: 531-537.
• Giriraj K., T. Vidyasslankar, M. Venkataran, S. Seethharam (1979). Path coefficient analysis of seed yield in sunflower. The Sunflower Newsletter, №4, Vol. 3, 10-12.
• Khan, A. (2001). Yield performance. Heritability and interrelationship in some quantitative traits in sunflower. Helia, 24 (34): 35-40.
• Marinković, R., B. Dozet, and D. Vasić. (2003). Oplemenjivanje suncokreta (Monografija), Školska knjiga,Novi Sad, 368.
• Oil World, 2011-https://www.feedipedia.org/node/6225
• Patil, B. R., M. Rudraradhya, C. H. M. Vijayakumar, H. Basappa, R. S. Kulkarni (1996). Correlationand path analysis in sunflower. J. Oilseeds Res. 13(2):162-166.
• Radic, V. (2008). Proizvodnja i morfološke osobine komercijalnih novosadskih linija suncokreta (Helianthus annuus ). Doktorska disertacija. Poljoprivredni fakultet, Univerzitet u Novom Sadu.
• Singh, B., Goel, C., Negi, S. (1984). Effect of supplementing mulberry (Morus alba) leaves ad libitum to concentrate diets of Angora rabbits on wool J. Appl. Rabbit Res., 7: 156-160
• Tahir, M. H. N., Sadaqat, H. A., and Sajid, B. (2002). Correlation and path coefficient analysis of morphological traits in sunflower (Helianthus annuus L.) populations. International Journal of Agriculture and Biology. 4(3):341-343.
• Valkova, D., M. Hristova-Cherbadzi, V. Nikolova, E. Penchev. (2008). Seed component diversity of wild Helianthus annuus L. accessions. Proc. Int. Conference “Conventional and Molecular Breeding of Field and Vegetable Crops”, Novi Sad, Serbia, 24-27 November 2008, p. 187-191.