Phosphorus Efficiency among Selected Sorghum (Sorghum Bicolor L. Moench) Lines and Segregating Families

  • Maritim Kassim K. Department of Biological Sciences, Moi University, P.O. Box. 1125- 30100 Eldoret.
  • Beatrice A. Were Department of Biological Sciences, Moi University, P.O. Box. 1125- 30100 Eldoret.
  • Samuel Gudu Moi University, P.O. Box. 3900 30100 Eldoret.
  • Augustino O. Onkware Department of Biological Sciences, Moi University, P.O. Box. 1125- 30100 Eldoret.
Keywords: Sorghum Bicolour, Phosphorus Efficiency, Segregating Families


Sorghum (Sorghum bicolor (L.) Moench) is an important food security crop in Kenya but its production is limited by low available soil phosphorus (P) amongst other factors. This is because its cultivation is mainly carried out by resource limited peasant farmers in marginal agricultural areas that are characterized by soils with very low P levels. This study was carried out to evaluate Kenyan sorghums that are tolerant to low P levels. A P efficient sorghum line, MCSR L6 was crossed with a P ineffi cient but P responsive line, MCSR N64. The resultant F1 seed was selfed to produce F2 seed that was used in the current study. Six F2 segregating families were characterized for P efficiency in the field with low available P (3 mg of P/kg of soil). MCSR L6 yielded better than MCSR N64, under low available P, but showed poor response to P application in the field. The F2 sorghum families segregated in terms of days to 50 % flowering, plant height, leaf number per plant, tiller number and grain yield. Based on grain yield, the six sorghum families were classified into four groups; efficient and responsive to P, inefficient and responsive to P, efficient and non -responsive to P, and inefficient and non -responsive to P. The results indicate that the F2 progeny show genetic variability for P efficiency and responsiveness to additional P, implying that these two traits were successfully transferred from the parents to the progenies


Abel, S., T icconi, C. A., & Delatorre, C. A. (2002). Phosphate sensing in higher plants. Physiologia plantarum 115, 1-8.

Ahmad, S., Yaseen, M., & Saboor, A. (2000). Genetic variation for phosphorus use in rice at two levels of soil applied phosphorus. Pakistan Journal of Biological Sciences 3 (8), 1274-1276

Camacho, R., Malavolta, E., Guerrero-Alves, J. & Camacho, T . (2002). Vegetative growth of grain sorghum in response to phosphorus nutrition. Scientia Agricola, 59: 771-776.

Castillon, P. (2001). Influence of phosphate fertilization on the nutrition and yield of barley on a soil with low plant -available phosphorus. Plant and Soil, 91, 221-229.

Corales, I., Amenós, M., Poschenrieder, C. & Barceló, J. (2007). Phosphorus efficiency and root exudates in two contrasting tropcal maize varieties. Journal of Plant Nutrition. 30, 1-14.

Export Processing Zones Authority -EPZA (2005). Grain production in Kenya. pp. 1 -2.

Falconer, D. S. (1989). Introduction to quantitative genetics (3rd edition). New York, U.S.A: Longman scientific & technical. pp.

Krasilnikoff, G., Gahoonia, G. & Nielsen, N. E. (2002). Variation in phosphorus Uptake Efficiency by Genotypes of Cowpea ( Vigna unguiculata) due to Differences in Root Hair Length and Induced Rhizosphere Processes. Plant and Soil 251, 83-91.

National Geographic Society, 1996 -2010 report .

Okalebo, J. A., Gudu, S., Obura, P. A., Othieno, C.O. & Ligeyo, D. O. (2004). Response of maize genotypes to nitrogen, phosphorus and lime in acid soils of western Kenya. Presented to the 22nd Annual Conference of the Soil Science Society of East Africa in Nov-Dec. in Arusha, T anzania.

Schaffert, R. E., Alves, V. M. C., Pitta, G. V. E., Bahia, A. F. C. & Santos, F. G. (2001). Genetic variability in sorghum for P efficiency and responsiveness. Plant nutrition-Food security and sustainability of agro -ecosystems. pp. 72-73.

Weidong, C., Jizeng, J. & Jiyun, J. (2001). Identification and interaction analysis of QT L for Phophorus use efficiency in wheat

seedlings. Plant nutrition-Food security and sustainability of agro-ecosystems. pp. 76-77.

Zidenga, T . (2004). DNA-based methods in sorghum diversity studies and improvement, pp. 1 -3.

Zhul, Y., Smith, S., Howes, N. & Smith, F. (2001). Phosphorus (P) uptake efficiency of doubled haploid lines of spring wheat derived from parents with different P uptake efficiency. Plant nutrition-Food security and sustainability of ago-ecosystem. pp. 70-71.
How to Cite
Kassim K., M., Were, B. A., Gudu, S., & Onkware, A. O. (2018, August 27). Phosphorus Efficiency among Selected Sorghum (Sorghum Bicolor L. Moench) Lines and Segregating Families. African Journal of Education,Science and Technology, 1(2), pp 158-162. Retrieved from