1 Ocak 2021 Dergi makalesi Açık Erişim

Pekcan, Veli; Yilmaz, M. Ibrahim; Evci, Goksel; Cil, Ayse Nuran; Sahin, Vakas; Gunduz, Oguz; Koc, Hasan; Kaya, Yalcin

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    <subfield code="a">Oil content determination on sunflower seeds in drought conditions</subfield>
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    <subfield code="a">Sunflower (Helianthus annuus L.) is one of the most important oil crops in the world and mostly produces oil. Due to the global warming and unexpected climatic changes especially extreme heat and droughts in recent years, as a spring crop sunflower affects severely by these climatic conditions in the vegetation period and loses seed yield hardly. Plant breeding longer process taking at least ten years to develop cultivars. Therefore, sunflower breeders should consider future climatic conditions, hence it seems that drought tolerance should consider primarily in their breeding programs. Oil content is the most important trait in sunflower than the major goal in the breeding studies; likewise, it is the most affected yield trait in sunflower from drought conditions. The study was conducted to determine the oil contents from drought some inbred lines and their hybrids developed lately in National Sunflower Project conducting by Trakya Agriculture Research Institute (TARI). Based on the study results; the significant relationships were observed between oil content and other yield traits in drought conditions. Oil content of male lines exhibited more variability than female lines changed as 13.16%-54.05% male lines and 19.12%-52.46% in female lines, and 30.17%-53.68% in the hybrids. While oil content of inbred lines affected negatively mostly from thousand seed weight and head diameter, leaf number, leaf area, and seed yield followed this trait, respectively. Based on path analysis for the contribution of yield traits on determining of oil content; it determined that seed and oil yield were the most directly affected traits then followed by oil yield in sunflower inbred lines in a negative way, and other yield traits mostly affected oil content determination in drought stress conditions over these two traits. The seed and oil yield, leaf area, and thousand seed weight reduced about over 90% in the drought in inbred lines. Severe droughts resulted heavy decreases in sunflower oil content as well as in the seed and oil yield and other yield traits so no need to focus on increasing oil contents over 40%-43% and it should be sacrified from this trait in that kind of conditions. The sunflower hybrid evaluations in three different locations mentioned that thousand seed weight, seed yield, and leaf area as well as leaf number are the most important yield traits affecting positively of oil content determination in drought stress conditions.</subfield>
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    <subfield code="u">Trakya Agr Res Inst, Sunflower Dept, Edirne, Turkey</subfield>
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