Tahsin SÖĞÜT

Effect of main and second cropping on seed yield, oil and protein content of sesame (Sesamum indicum L.) genotypes

Double-cropping of sesame (Sesamum indicum L.) with small grains has been quite successful across the southeastern Turkey. However, producers in this region use planting dates ranging from early May as main crop (normal) through late June as second crop (late). We investigated the effect of the two sowing periods (early May and late June) on oil and protein content and seed yield of sesame genotypes under agro-climatic conditions of southern of Turkey in 2003 and 2004 growing seasons. Results indicated that sowing time significantly affected seed yield, 1000-seed weight, oil yield and protein yield. The highest seed yield was obtained when sesame genotypes were planted late (20 June) as second cropping. Genotype Y-A30 produced the highest seed yield (1352.2 kg $ha^{-1}$) across the 2-year study, averaging 430 and 422 kg $ha^{-1}$ more seed yield than Vara Verde and Muganlı varieties, respectively. Results from the seed analyses indicated that no difference in oil and protein contents between sowing time was observed, while genotypes displayed significant variation amongst them for oil and protein contents. Furthermore, oil and protein yields appeared to change with sowing time and in general, the earlier sowing time decreased oil and protein yield as a result of higher pod yield.

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Ashri, A. 1999. Sesame. In: Röbbelen, G., Downey, R.K., Ashri, A. (Eds), Oil Crops of the World: Their Breeding and Utilization, McGraw-Hill, NY, 375–387.
AOAC. 1960. Official Methods of Analysis. Association of Official Agricultural Chemistry, Washington, DC.
Baydar, H., I. Turgut, K. Turgut. 1999. Variation of certain characters and line selection for yield, oil, oleic and linoleic acids in the Turkish sesame (Sesamum indicum L.) populations, Turkish Journal of Agriculture and Forestry, 23: 431–441.
Boerma, H.R. 1979. Breeding soybean for double-cropping. In: Loden, H.D., Wilkenson, D. (Eds.) Proc. 8th Soybean Seed Res. Conf., Chicago, IL. 14-15 Dec. 1978. American Seed Trade Assoc., Washington, DC.
Burkhill, I.H., 1953. Habits of man and the origins of the cultivated plants of the Old World. Proc. Linn. Soc. Lond. 164: 12–42.
Carter, T.E. and H.R. Boerma. 1979. Implications of genotype x planting date and row spacing interactions in double-cropped soybean genotype development. Crop Science, 19: 607– 610.
Das, A. and S.K. Samanta. 1998. Genetic analysis of oil content and fatty acids in sesame (Sesamum indicum L.), Crop Research, 15: 199–205.
Kaya, N. and A.F. Savran 1996. Biochemical studies on seeds of sesame (Sesamum indicum L.) genotypes. Ege Üniversitesi Ziraat Fakültesi Dergisi, 33 (2/3): 33-40.
Li, C. and Y. Li. 1992. Study of sesame seed development. Sesame Safflower Newsletter, 7: 8-17.
Kane, M.V., C.C. Steele and L.J. Grabau. 1997. Early-maturing soybean cropping system: I. Yield responses to planting date. Agronomy Journal, 89: 454–458.
Steel, R.G.D. and Torrie, J.H. 1980. Principles and Procedures of Statistics. 2nd Edition Mc Graw Hill Book Comp., New York.
Weiss, E.A., 2000. Oilseed Crops. Second Edition, Blackwell Science, Oxford.
Whigham, D.K. and H.C. Minor. 1978. Agronomic characteristics and environmental stress. Norman, A.G.(Ed). Soybean Physiology, Agronomy and Utilization 249 p. Academic Press, London.