Because in available cultivated sunflowers there is a very very narrow genetic base. In that situation, how can we develop diverse inbred lines for different traits.
you can go through haploid production of sunflower then diplotise this by any mutagen.
There are two main options for developing diverse inbreds in sunflower (1). Population approach (2) double haploid. Exploitation of wild sunflowers to broaden the genetic base of inbreds. There are many advantages and disadvantages of each methods. I think today there is urgent need of Double haploid methods but it required good protocol for regeneration of plants. I feel that Translocation stock is an innovative approach for development of new good material for sunflower heterosis breeding. But it required good expertise in field of cytogenetics.
classical methods based on selection in field is the best way for improvement of inbred lines. however open pollinated cultivars with high diversity is good source for inbreeding. croosing between different OPs could broaden genetic base. is there DH based introduced sunflower hybrid yet?
Dr. Mehdi i fully agreed with you there is no DH based sunflower hybrid yet but it is a innovative tool for developing diverse new inbred lines using wild species. But the major problem is that it required sophisticated laboratory and good regeneration protocol. Another reason is that there is no much diversity within available cultivated germplasm for developing good inbred lines. DH technique mostly utilized by USDA scientist for developing diverse sunflower good material.
hi dear Dr, Prakash; may be these are usefull;
1- Todorova, M., P. Ivanov, et al. (1997). "Doubled haploid production of sunflower (Helianthus annuus L.) through irradiated pollen-induced parthenogenesis." Euphytica 97(3): 249-254.
2-Jan et al. Present and future plans of the sunflower “Doubled Haploid” project, USDA project
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