CHAPTER 1........................................................................................................ 31
1.5 Research gaps identified in the review of literatures
The importance and techniques of determining response of crops to the levels of P, and the interaction of genotype x levels of P; combining ability; heterosis, and inheritance of P use efficiency has been reported by several authors on various crops. However, there was no adequate report on these subjects on soybean,
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particularly on acidic soil, which indicates the absence of comprehensive study that has been done on the crop for performance under high and low soil P conditions.
Some results related to the current research have been reported on soybean;
however, the methodology and the environments used for the study were entirely different. For instance, even though the genetic variability of soybean has been assessed by Gizlice et al. (1993), there was no report found on genetic variability study of soybean under high and low P conditions. Similarly, although, Furlani et al. (2002) determined the response of soybean genotypes to the levels of P, and genotype x P interaction, however, the study was conducted on nutrient solution, while the current study was undertaken under both pot and field conditions on acidic soils. Even though, combining ability study was reported on soybean, there was no report found on the combining ability of soybean under high and low P conditions. In general, no comprehensive report was found that dealt with the genetic analysis of soybean under low and high P conditions on acidic soil. This shows that the literature review has clearly pointed out the gaps which needed to be addressed by the current research.
References:
Alemu, T. 2001. Genetic divergence and association for yield and related traits in barley (Hordeum vulgare L.). M.Sc. Thesis, Alemaya University, Alemaya, Ethiopia.
Araujo, A.P., M.G. Teixeira, and D.L. de Almeida. 1998. Variability of traits associated with phosphorus efficiency in wild and cultivated genotypes of common bean. Plant and Soil 203:173-182.
Asfaw, A., A. Tesfaye, S. Alamrie, and M. Atnaf. 2006. Soybean genetic improvement in Ethiopia, pp. 22-26, In K. Ali, et al., (eds.) Food and Forage Legumes of Ethiopia: progress and prospects. Proceedings of the workshop on food and forage legume, Ghion Hotel, Ethiopia.
42
Aulakh, M.S., N.S. Pasricha, and G.S. Bahl. 2003. Phosphorus fertilizer response in an irrigated soybean–wheat production system on a subtropical, semiarid soil. Field Crops Research 80:99-109.
Belay, A. 1987. Progress and future prospect in soybean research in Ethiopia, pp. 252-265 In Proceedings of the 19th national crop improvement conference. Institute of Agricultural Research, Ethiopia, Addis Ababa, Ethiopia.
Bonser, A.M., J. Lynch, and S.E. Snapp. 1996. Effect of phosphorus defficiency on growth angle of basal roots in Phaseolus vulgaris. New Phytologist 132:281-288.
Crossa, J. 1990. Statistical analysis of multi-location trials. Advances in Agronomy 44:55-58.
Dabholakar, A.R. 1992. Elements of biometrical genetics Concept publishing company, New Delhi, 110059.
Fox, P.N., J. Crossa, and I. Romagosa. 1997. Multi-environment testing and genotype x environment interaction, pp. 117-138, In R. A. Kempton and P.
N. Fox, (eds.) Statistical methods for plant variety evaluation. Chapman and Hall, London.
Furlani, A.M.C., P.R. Furlani, R.T. Tanaka, H.A.A. Mascarenhas, and M.d.D.
Delgado. 2002. Variability of soybean germplasm in relation to phosphorus uptake and use efficiency. Scientia Agricola 59:529-536.
Gauch, H.G., and R.W. Zobel. 1997. Identifying mega-environments and targeting genotypes. Crop Science 37:311-326.
Gizlice, Z.C.J., Thomas E.; and Burton, Joseph W. 1993. Genetic diversity in North American soybean: I. Multivariate analysis of founding stock and relation to coefficient of parentage Crop science 33:614-620.
Gravina, G.d.A., C.S. Sediyama, S.M. Filho, M.A. Moreira, and E.G. de Barros.
2003. Diallel analysis for frogeye leaf spot resistance in soybean. Pesq.
agropec. bras., Brasília 38:673-680.
43
Griffings, B. 1956. Concept of general and specific combining ability in relation to diallel crossing systems. Australian Journal of Biological Sciences 9:463- 493.
Hammer, O., and L.G. Haraldson. 1975. Introduction of soybeans in Ethiopia, pp.
196-197, In D. K. Whigham, (ed.) Soybean production, protection and utilization: Proceeding conference for scientists of Africa, the Middle East, and South Asia. INTSOY Series No. 6, Addis Ababa, Ethiopia.
Hymowitz, T. 2004. Speciation and cytogenetics, In H. R. Boerma and J. E.
Specht, eds. Soybeans: improvement, production and uses. Agronomy No 16, 3rd ed.
Johnson, S.L., W.R. Fehr, G.A. Welke, and S.R. Cianzio. 2001. Genetic variability for seed size of two- and three-parent soybean populations.
Crop Science 41:1029-1033.
Kimani, J.M., P.M. Kimani, S.M. Githiri, and J.W. Kimenju. 2007. Mode of inheritance of common bean (Phaseolus vulgaris L.) traits for tolerance to low soil phosphorus (P). Euphytica 155:225-234.
Korkmaz, K., J. Ryan, H. Ibrikci, E. Karnez, G. Buyuk, and A.C. Ulger. 2007.
Phosphorus use efficiency of wheat genotypes grown in Turkish calcareous soils. Abstract. ASA-CSSA-SSSA, 2007 International meeting, New Orleans, Loisiana.
Krishnawat, B.R.S., and S.R. Maloo. 2004. Combining ability and heterosis on some stress tolerance traits of soybean [Glycine max (L.) Merrill]. Indian Journal of Genetics and Plant Breeding 64:157-158.
Ogoke, I.J., A.O. Togun, and K.E. Dashiell. 2006. Soybean phosphorus-use efficiency in the moist savanna of West Africa. Journal of Sustainable Agriculture 28:5-18.
Ortiz-Monasterio, J.I.P., R.J.; Pfeiffer, W. H., and Hede, A.H. 2002. Phosphorus use efficiency, grain yield and quality of triticale and durum wheat under irrigated conditions In: Proceedings of the 5th International Symposium, Annex, Radizkow, Poland.
44
Rincon, C.A., C.D. Raper, and R.P. Patterson. 2003. Genotypic differences in root anatomy affecting water movement through roots of soybean.
International Journal of Plant Sciences 164:543-551.
Rojas, B.A., and G.F. Sprague. 1952. A comparison of variance components in corn yields trials - III: general and specific combining ability and their interaction with location and years. Agronomy Journal 44:462-466.
Romanus, K.G., S. Hussein, and M. W.P. 2007. Combining ability analysis and association of yield and yield components among selected cowpea lines.
Euphytica 162: 205-210.
Singh, S.P., H. Teran, C.G. Munoz, J.M. Osorno, J.C. Takegami, and M.D.T.
Thung. 2003. Low soil fertility tolerance in land races and improved common bean genotypes. Crop Science 43:110-119.
Sleper, D.A., and J.M. Poehlman. 2006. Breeding field crops. 5th ed. Blackwell publishing.
Spehar, C.R. 1995. Diallel analysis for mineral element absorption in tropical adapted soybeans [Glycine max (L.) Merrill]. TAG Theoretical and Applied Genetics 90:707-713.
Tesfaye, A. 2001. Genotype x environment interaction in landrace derived advanced lines of sorghum (Sorghum bicolor L Moench). MSc thesis, Haromaya University, Alemaya, Ethiopia.
Tesfaye, A. 2004. Genetic diversity of landrace sorghums of Southwestern Ethiopia, pp. 64-67. In Proceedings of the 11th Conference of Crop Science Society of Ethiopia, Vol. 11, Hiruy Hall, Ethiopian Institute of Agricultural Research, Addis Ababa
Tesfaye, A. 2007. A terminal report submitted to Ethiopian Institute of Agricultural Research upon leave for further study. Jimma Agricultural Research Center, Jimma, Ethiopia.
Tesfaye, A., and L. Tulu. 2004. Grain yield stability of large seeded haricotbeans (Phaseolus vulgaris L.) genotypes in Southwestern Ethiopia, pp. 40-44.
Proceedings of the 11th conference of crop science society of Ethiopia, Sebil, Vol. 11, Addis Ababa, Ethiopia.
45
Vadez, V., and J.J. Drevon. 2001. Genotypic variability in phosphorus use efficiency for symbiotic N2 fixation in common bean (Phaseolus vulgaris L.). Agronomie 21:691-699.
Wilcox, J.R. 2004. World distribution and trade of soybean, In H. R. Boerma and J. E. Specht, eds. Soybeans: improvement, production and uses, Agronomy No.16, 3rd ed.
Zobel, R.W., M.J. Wright, and H.G.J. Gauch. 1998. Statistical analysis of yield trial. Agronmomy Journal 80:388-393.
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