Temporal variation in phonological and agronomic traits of some irrigated facultative/winter bread wheat (Triticum aestivum L.) cultivars released between 1943 and 2011 in Iran


1 Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.

2 Internatioanl Maize and Wheat Improvement Cenetr (CIMMYT), Karaj, Iran.

3 Islamic Azad University, Karaj, Iran.

4 Agriculture faculty of Varamin, Islamic Azad University, Varamin, Iran.

5 Khorasan-e-Razavi Agriculture and Natural Research Center, Agricultural Research, Education and Extension Organization (AREEO), Mashhad, Iran.


A field experiment was conducted at the Seed and Plant Improvement Institute Research Field Station in Karaj, Iran, during the 2009-10 and 2010-11 growing seasons to estimate genetic progress and the variation in penological and agronomic characteristics in 13 irrigated facultative/winter bread wheat (Triticum aestivum L.) cultivars released in Iran between 1943 and 2011. Trends of temporal variation of the traits measured revealed that grain yield and some related phonological and agronomic traits have increased in the more recently released cultivars. Thousand grain weight decreased slightly compared to older cultivars. Number of days to heading and anthesis decreased in new cultivars, butgrain-filling period and days to physiological maturity did not change. Spike length also increased but plant height decreased in more recently released cultivars. These changes may explain the increase in grain yield of newly released facultative/winter bread wheat cultivars.


Alvaro, F., J. Isidro, D. Villegas, L. F. Garcia-Delmoral, and C. Royo. 2008. Old and modern durum wheat varieties from Italy and Spain differ in main spike components. Field Crops Res.106: 86–93.
Araus, J., G. A. Slafer, M. P. Reynolds, and C. Royo. 2004. Physiology of yield and adaptation in wheat and barley. Pp. 1-49. In Nguyen H. T., and A. Blum (eds.). Physiology and Biotechnology Integration for Plant Breeding. CRC Press. Taylor and Francis Group.
Aisawi, K., M. J. Foulkes, M. P. Reynolds, and S. Mayes. 2010. The physiological basis of genetic progress in yield potential of CIMMYT wheat varieties from 1966 to 2009. Pp. 349. In Dzyubenko, N. I. (ed.). Proceedings of 8th International. Wheat Conference. St. Petersburg, Russia.
Austin, R. B., J. Bingham, R. D. Blackwell, L. T. Evans, M. A. Ford, C. L. Morgan, and M. Taylor. 1980. Genetic improvements in winter wheat yields since 1900 and associated physiological changes. J. Agric. Sci. Camb. 112: 295-301.
Austin, R. B., M. A. Ford, and C. L. Morgan. 1989. Genetic improvement in yield of winter wheat: A further evaluation. J. Agric. Sci.Camb. 112: 295-301.
Brancourt-Hulmel, M., G. Doussinault, C. Lecomte, P. Berard, B. LeBuanec, M. Trottet. 2003. Genetic improvement of agronomic traits of winter wheat cultivars released in France from 1946 to 1992. Crop Sci. 43: 37–45.
Calderini, D. F., and G. A. Slafer. 1998. Changes in yield and yield stability in wheat during the 20th century. Field Crops Res. 57(3): 335-347.
Calderini, D. F., M. P. Reynolds, and G. A. Slafer.1999. Genetic gains in wheat yield and associated physiological changes during the twenty century. Pp. 351-377. In Satorre, E. H., and G. A. Slafer (eds.). Wheat: ecology and physiology of yield determination. Food Product Press.
Dixon, J., H. J. Braun, P. Kosina, J. Crouch. 2009. Wheat facts and figures 2009. Mexico, D. F.: CIMMYT. 95 pp.
Einspruch, E. L. 2005. An introductory guide to SPSS for windows. Stage Publication Inc. Thousand Oaks, CA.
FAO. 2006. World agriculture: Towards 2030/2050. Interim Report. Global Perspective Studies Unit. FAO, Rome, Italy.
FAO. 2012. FAOSTAT agriculture data. Agricultural production 2009. FAO, Rome. Available at: http://faostat.fao.org.
Lopes, M. S., M. P. Reynolds, Y. Manes, R. P. Singh, J. Crossa, and H. J. Braun.2012. Genetic yield gains and changes in associated traits of CIMMYT spring bread wheat in a “Historic” set representing 30 years of breeding. Crop Sci. 52: 1123–1131.
Loss, S. P., and K. H. M. Siddique. 1994. Morphological and physiological traits associated with wheat yield increases in Mediterranean environments. Adv. Agron. 52: 229-276.
Perry, M.W., and M.F. d'Antuono. 1989. Yield improvement and associated characteristics of some Australian spring wheat cultivars introduced between 1860 and 1982. Crop Pasture Sci. 40(3): 457-72.
Richards, R. A. 1996a. Defining selection criteria to improve yield under drought. Plant Growth Regul. 20: 57-166.
Richards, R. A. 1996b. Increasing yield potential in wheat-source and sink limitations. pp.134-149. In: Reynolds, M. P., S. Rajaram, and A. McNab (eds). Increasing yield potential in wheat: Breaking the barriers. Mexico, D. F.: CIMMYT.
SAS Institute. 2000. The SAS system for windows. Release 8.01, SAS InstInc, Cary, New York City.
Satorre, E. H., and G. A. Slafer. 1999.Wheat: ecology and physiology of yield determination. Food Product Press. 503 pp.
Sayre, K. D. 1996.The role of crop management research in CIMMYT in addressing bread wheat yield potential issues. Pp. 203-208. In Reynolds, M. P., S. Rajaram, and A. McNab (eds.). Increasing yield potential in wheat: Breaking the barriers. Mexico, D. F.: CIMMYT.
Sayre, K. D., S. Rajaram, and R. A. Fischer. 1997. Yield potential progress in short bread wheats in North Mexico. Crop Sci. 37: 36-42.
Singh, R. P., J. Huerta-Espino, S. Rajaram, and J. Crossa. 2001. Grain yield and other traits of tall and dwarf isolines ofmodern bread and durum wheats. Euphytica. 119:241–244.
Slafer, G. A., and F. H. Andrade. 1989. Genetic improvement in bread wheat (Triticum aestivum) yield in Argentina. Field Crops Res. 21(3): 289-296.
Trethowan, R., and W. H. Pfeiffer.1999. Challenges and future strategies in breeding wheat for adaptation to drought stressed environments: A CIMMYT wheat program perspective. Pp. 45-48. In Ribaut, J. M., and D. Poland (eds.). Molecular approaches for the genetic improvement of cereals for stable production in water-limited environments. Mexico, D F: CIMMYT.
Xiao, Y. G., Z. G. Qian, K. Wu, J. J. Liu, X. C. Xia, W. Q. Ji, and Z. H. He. 2012. Genetic gains in grain yield and physiological traits of winter wheat in Shandong province, China, from 1969 to 2006. Crop Sci. 52: 44–56.
Zand, E., A. Koocheki, H. Rahimian, and M. Nasiri Mahalti. 2002. Study of the trend of morphological and physiological characteristics in some Iranian wheat cultivars over 50 years. J. Sci. Agric. Indust. 16(1): 116-171.
Zhou, Y., Z. H. He, X. X. Sui, X. C. Xia, X. K. Zhang, and G. S. Zhang. 2007. Genetic improvement of grain yield and associated with traits in the northern China winter wheat region from 1960 to 2000. Crop Sci. 47: 245–253.