1- Adams, M. W. 1982. Plant architecture and yield breeding. Iowa State J. Res. 56: 225-254.
2- Azizi, F. 1998. Multivariate analysis of morphological traits in bean genotypes. M.Sc. Thesis. Faculty of Agriculture, IsfahanUniversity of Technology. 129 pp.
3- Ganal, W. C. and Rode, M. S. 1999. Genetic diversity of old French sixrowed winter barley varieties assessed with molecular, biochemical and morphological markers and it’s relation to (BAMMV) resistance gene. Journal of Genetic and Genomics. 32:145- 186.
4- Gupta, A. K., Mittal, R. K. and Ziauddin, A. Z. 1999. Association and factor analysis in spring wheat. Ann. Agric. Res. 20: 481- 485
5- Johnson, B., Gardner, C. O. and Wred, K. C. 1988. Application of an optimizationmodel to multi-trait selection programs. Crop Sci. 22: 723-728.
6- Khazaei, A., Moghaddam, M., Nourmohammadi, S. and Shafaeddin, S. 2002. Study of genetic variation in winter barley landraces related to west part of Iran. Proc. 7th Iranian Crop Science Congress. P. 251. (Abstract).
7- Mohammadi, M., Ghannadha, M. R. and Taleei, A. 2002. Study of genetic Variation in Iranian local bread wheat lines using multivariate techniques. Seed and Plant. 18 (3) : 328 – 347.
8- Moghaddam, M., Mohammadi Shouti, A. and Aghaee Sarbarzeh, M. 1994. An introduction to multivariate analysis techniques. Pishtazane Elme Tabriz Press. 208 pp.
9- Pirouznia, M., Nemat zadeh, G.A., and Kianoush, G.A. 1998. Study and determination of yield and its components with some important agronomic traits in bread wheat. Proc. 5th Iranian Crop Science Congress. P. 50.(Abstract).
10- SAS Institute .2000. The SAS system for windows. Release 8.01, SAS Inst Inc, Cary, NC
11- Sayre, K. D. 1998. Methods for estimating wheat yield components from hand harvest plots. Wheat Special Report. Mexico, D.F.: CIMMYT.
12- Siahpoush, M. R., Emam, Y. and Saeidi, A. 2003. Genotypic variation, heritability, genotypic and phenotypic correlation coefficients of grain yield, its components and some morpho – physiological characters in bread wheat (Triticum aestivum L.). Iranian Journal of Crop Sciences. 5 (2) : 86 – 101.
13- Sinebo, W. 2002. Yield relationships of barleys grown in a tropical highland environment. Crop Sci. 42: 428-437.
14- Slafer, G. A. and Andrade, F. H. 1991. Change in physiological attributes of the dry matter economy of bread wheat (Triticum aestivum) through genetic improvement of grain potential at different regions of the world. A review. Euphytica.58:37-58.
15- Slafer, G. A. and Andrade, F. H. 1993. Physiological attributes related to the generation of grain yield in bread wheat cultivars released at different area. Field Crops Res. 31 : 351- 363.
16- Slafer, G. A., Calderini, D. F. and Miralles, D. J. 1996. Yield components and compensation in wheat: Opportunities for further increasing yield potential. Pp. 101-133. In: M. P. Reynolds, S. Rajaram, and A. McNab (Eds.). Increasing yield potential in wheat: Breaking the barriers. Mexico, D.F.: CIMMYT.
17- Einspruch, E. L. 2005. An introductory guide to SPSS~for windows. Stage Publication, Inc. Thousand Oaks, CA.
18- Valizadeh, K. and Kazemi Arbat, H. 2006.
Correlation and path analysis of grain yield and its components in naked barley. Proc. 9th
, Iranian Crop Science Congress. P. 334(Abstract).