World Journal of Agricultural Research
ISSN (Print): 2333-0643 ISSN (Online): 2333-0678 Website: Editor-in-chief: Rener Luciano de Souza Ferraz
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World Journal of Agricultural Research. 2013, 1(5), 90-95
DOI: 10.12691/wjar-1-5-4
Open AccessArticle

Effect of Root Age and Day-Length Extension on Sugar Beet Floral Induction and Fertility

Salah F. Abo-Elwafa1, 2, , Husein M. Abdel-Rahim2, Adel M. Abou-Salama2 and El-Mahdy A. Teama2

1Plant Breeding Institute, Christian-Albrechts University of Kiel, Germany

2Agronomy Department, College of Agriculture, Assiut University, Egypt

Pub. Date: October 10, 2013

Cite this paper:
Salah F. Abo-Elwafa, Husein M. Abdel-Rahim, Adel M. Abou-Salama and El-Mahdy A. Teama. Effect of Root Age and Day-Length Extension on Sugar Beet Floral Induction and Fertility. World Journal of Agricultural Research. 2013; 1(5):90-95. doi: 10.12691/wjar-1-5-4


Bolting tendency in the crop species Beta vulgaris, which includes the sugar beet, is a complex trait governed by various environmental cues, including prolonged periods of cold temperatures over winter (vernalization) and photoperiod. This work was carried out as a part of a series of experiments on sugar beet floral induction under Egyptian conditions as part of the effort to breed and select sugar beet cultivars adapted to local environmental conditions. Ten diploid cultivars were sown in the field at three dates on 15th, 30th July and 15th August to provide roots at the ages of 120, 135 and 150 days, and harvested on the 15th of December. The roots were vernalized at 4°C for 45 days before replanting in the field. Extended vs. natural day-length were applied 3 weeks after replanting. Data was collected on flowering behavior, pollen fertility seed setting and seed germination. The results indicate that cultivars’ responses are the main factor that controlled the response to the imposed treatments. The response of cultivars varied according to root age, and day-length treatments. In most of the flowering cultivars, extended day-length improved the measured traits. Older root age also tended to enhance the measured traits with minor exceptions. The findings of this work are a step towards the definition of techniques that can be used to start a sugar beet breeding program under Egyptian conditions.

sugar beet bolting flowering fertility floral induction Beta vulgaris

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[1]  Abe, J., G.P. Guan and Y. Shimamoto (1997). A marker assisted analysis of bolting tendency in sugar beet (Beta vulgaris, L.). Euphytica, 94: 137-144.
[2]  Agrawal, R. L. (1980). Seed germination, p. 449-474. In Seed technology. 2nd ed. Oxford & IBH Publishing Co. PVT. LTD., 66 Janpath, New Delhi, India.
[3]  Atia, A.E. (2000). Sugar beet (Beta vulgaris, L) seed production and its viability in Egypt. M.Sc. Thesis, Fac. Agric., Ain Shams Univ.
[4]  Chatin, P., Gokhale, D., Nilsson, S. and Chitins, A. (2004). Sugar beet growing in tropical areas: A new opportunity for growers and the sugar industry. Proc. Internl. Symp. On Sustainable Sugarcane & Sugar Production Technology, Nanning, P.R. China, pp 175-179 (2004).
[5]  Debenham, G.B., P.M. Van Roggen, S.J. Yallop and T.H. Thomas (1997). The influence of seed size and plant age at vernalizaton on bolting and flowering in sugar beet. Proc. of the 63rd Autumn IIRB Congress, Nov. 1997.
[6]  El-Talkhawy, N. M. (1992). Studies on the flowering of some sugar beet varieties. Ph.D. thesis Fac. Agric. Saba Basha, Alex. Univ.
[7]  Farag, M. A. (1997). Flowering and seed production of sugar beet. Egyptian Society of Sugar Technologists, 28th annual conference, 2-4 Dec., 1997.
[8]  Gaber, A.A. and A.H. Nour (1981). Effect vernalization on flowering and seed setting in sugar beet. J. Agr. Res. Review, 8: 73-84.
[9]  Gaskill, John O. (1963). Comparison of the fluorescent and incandescent lamps for promotion of flowering in sugar beet seedlings. J. Am. Soc. Sugar Beet Technol., 12 (7): 623-634.
[10]  Gomez, K. and A.A.Gomez (1984). Statistical procedures for agricultural research. Awiley Interscience Puplication, John Wiley & Sons. Inc. New York, USA.
[11]  Guan-Guoping, Abe, J., Shimamoto,Y. and Guan, GP. (1994). Genetic analysis of bolting tendency in sugar beet. Proc. of the Japanese Society of Sugar Beet Tech., 36: 145-151.
[12]  Hecker, R. J., P. C. Stanwood and C.A. Soulis (1986). Storage of sugar beet pollen. Euphytica, 35: 777-783.
[13]  Hecker, R. J. (1988). Pollen characteristics of diploid and tetraploid sugar beet. J. Sugar Beet Res., 25 (1): 55-62.
[14]  Hecker, R. J. and M. McClintock (1988). Sugar beet pollen germination in vitro. J. Sugar Beet Res. 25 (1): 42-54.
[15]  Hogaboam, G.J. (1982). Early induction of flowering in sugar beets. Agron. J. 7 (4): 151-152.
[16]  Lexander, K. (1980). Present knowledge of sugar beet bolting mechanisms. Proc. of the 63rd Winter IIRB Congress, 245-257.
[17]  Morris, P. C., D.G. Grierson and W. J. Whittington. (1985). The influence of fruit structure on germination of sugar beet (Beta vulgaris). Seed Sci. & Technol.,13, 41-51.
[18]  Smit, A.L. (1982). Influence of temperature and day length on bolting in sugar beet. Proc. Of 45th Winter Congress of the International Institute for Sugar Beet Research, pp. 25-36.
[19]  Smit, A.L. (1983). Influence of external factors on growth and development of sugar beet (Beta vulgaris, L.). Ph.D. Thesis, Center for agricultural publishing and documentation, Wageningen Univ., Nether Lands.
[20]  Waller, R.A and D.B. Duncan (1969). A bays rule for the symmetric multiple comparison problem. Amer. State. Assoc. J. Dec., 1485-1503.
[21]  FAO (2012).