Preliminary environment evaluation based on maize data from Randomized Complete Block designs conducted in Florina and Thessaloniki, allowed the comparative analysis of newer and older Greek barley varieties. Yield measurements were followed by additional measurements of field characteristics that involved plant height in March, total plant height at maturity, vegetative period in days, susceptibility to lodging, kernel protein (%), 1000-kernel weight, number of tillers, number of kernels per ear and length of ear. Yield was additionally analyzed in components according to honeycomb methodology that depict yielding performance per se, resistance to stresses and responsiveness to inputs. According to honeycomb methodology, differences found between barley varieties studied are more reliable and breeders can depend on these findings to define the use of each variety according to differences in yield components. The yielding performance of newer barley varieties depends on the number of fertile tillers that contributes to higher individual plant yield and additionally, to high tolerance or resistance to various stresses and high responsiveness to inputs. Newer varieties Persefoni and Demetra exhibited great and stable yielding performance and high productivity dynamic that overyielded all other varieties, while Thermi although an old variety, proved to be a very good genetic material with satisfactory characteristics and yielding performance.
Anderson, M.K., Reinbergs, E. 1985. Barley breeding (ed. D.C. Rasmusson). Series Monograph. ASA-CSSA-SSSA, Madison, WI 53711, USA, 26 :231–268.
Reinbergs E. , '', in Series Monograph , (1985 ) -.
Austin, R.B. 1993. Augmenting yield-based selection. In: Hayward, M.D., Bosemark, N.O., Romagosa, I. (eds), Plant Breeding: Principles and Prospects. Chapman and Hall, London, pp. 391–421.
Austin R.B. , '', in Plant Breeding: Principles and Prospects , (1993 ) -.
Austin, R.B., Ford, M.A., Morgan, C.L. 1989. Genetic improvement in the yield of winter wheat: A further evaluation. J. Agric. Sci. (Cambridge) 112 :295–301.
Morgan C.L. , 'Genetic improvement in the yield of winter wheat: A further evaluation ' (1989 ) 112 J. Agric. Sci. (Cambridge) : 295 -301 .
Constantinidou, K., Fasoulas, A.C. 1988. Evidence for the genetic basis of heterosis during hybrid reconstruction in maize. Proceedings of the 2nd Congress of the Hellenic Society for the Genetic Improvement of Plants. Thessaloniki. pp. 215–225.
Dhimas, K.V., Eleftherohorinos, I.G., Vasilakoglou, I.B. 2000. Interference between Avena sterilis, Phalaris minor and five barley cultivars. Weed Res. 40 :549–559.
Vasilakoglou I.B. , 'Interference between Avena sterilis, Phalaris minor and five barley cultivars ' (2000 ) 40 Weed Res. : 549 -559 .
Duvick, D.N. 1977. Genetic rates of gain in hybrid maize yields during the past 40 years. Maydica 22 :187–196.
Duvick D.N. , 'Genetic rates of gain in hybrid maize yields during the past 40 years ' (1977 ) 22 Maydica : 187 -196 .
Duvick, D.N. 1997. What is yield? In: Edmeades, G.O., Banzinger, B., Mickelson, H.R., Pena-Valdivia, C.B. (eds), Developing Drought and Low N-Tolerant Maize. Proceedings of a Symposium, March 25–29, 1996, CIMMYT, El Batan, Mexico. Mexico, D.F. pp. 332–335.
Duvick D.N. , '', in Developing Drought and Low N-Tolerant Maize. Proceedings of a Symposium, March 25–29, 1996 , (1997 ) -.
Ekman, R. 1981. Biomass component studies in barley, their correlation to some yield characters and estimation of durable effect from 50 years of barley breeding. Proc. 4 th Int. Barley Genetics Symp., Edinburgh, Scotland. 22–29 July. Edinburgh Press, pp. 104–111.
Evans, L.T. 1980. The natural history of crop yield. American Scientist 68 :388–397.
Evans L.T. , 'The natural history of crop yield ' (1980 ) 68 American Scientist : 388 -397 .
Fasoula, V.A., Fasoula, D.A. 2000. Honeycomb breeding: Principles and applications. Plant Breed. Rev. 18 :177–250.
Fasoula D.A. , 'Honeycomb breeding: Principles and applications ' (2000 ) 18 Plant Breed. Rev. : 177 -250 .
Fasoula, V.A., Fasoula, D.A. 2002. Principles underlying genetic improvement for high and stable crop yield potential. Field Crops Res. 75 :191–209.
Fasoula D.A. , 'Principles underlying genetic improvement for high and stable crop yield potential ' (2002 ) 75 Field Crops Res. : 191 -209 .
Fasoulas, A.C. 1981. Principles and methods of plant breeding. Publ. No 11. Dept. of Genetics and Plant Breeding. Aristotle Univ. of Thessaloniki. Thessaloniki, Greece. p. 148.
Fasoulas, A.C. 1993. Principles of crop breeding. A.C. Fasoulas, P.O. Box 19555, Thessaloniki, Greece. p. 128.
Fasoulas, A.C., Fasoula, V.A. 1995. Honeycomb selection designs. Plant Breed. Rev. 13 :87–138.
Fasoula V.A. , 'Honeycomb selection designs ' (1995 ) 13 Plant Breed. Rev. : 87 -138 .
Gogas, D.M. 1989. Yield stabilty and quality fluctuations in five breadwheat varieties cultivated in Greece. Agr. Med. 119 :361–365.
Gogas D.M. , 'Yield stabilty and quality fluctuations in five breadwheat varieties cultivated in Greece ' (1989 ) 119 Agr. Med. : 361 -365 .
Greveniotis, V., Koutsika-Sotiriou, M., Bladenopoulos, K. 2004. Evaluation of the yield potential of six barley cultivars. (In Greek with English Summary). 10 th Congress of the Greek Plant Breeding Society. November 24–26, Athens, Greece, pp. 261–265.
Gymer, P.T. 1981. The achievements of 100 years and barley breeding. Proc. 4 th Int. Barley Genetics Symp., Edinburgh, Scotland. 22–29 July. Edinburgh Press, pp. 112–117.
Ipsilandis, C.G., Vafias, B.N. 2005. Plant density effects on grain yield per plant in Maize: Breeding implications. Asian J. Plant Sci. 4 :31–39.
Vafias B.N. , 'Plant density effects on grain yield per plant in Maize: Breeding implications ' (2005 ) 4 Asian J. Plant Sci. : 31 -39 .
Ipsilandis, K. 1996. The possibility to predict combining ability between maize inbred lines based on best cross performance. Ph.D. Thesis, Dept. Genetics and Plant breeding. Aristotle University of Thessaloniki. Greece. 120 pp.
Ipsilandis K. , '', in The possibility to predict combining ability between maize inbred lines based on best cross performance , (1996 ) -.
Koparanis, T., Bladenopoulos, K., Koutsika-Sotiriou, M. 2006. Biological and conventional cultivation effect on agronomic behavior between six old and new barley ( Hordeum vulgare L.) varieties and estimation of their yield potential. (In Greek with English summary). Agricult. Res. (NAGREF) 29 :41–52.
Koutsika-Sotiriou M. , 'Biological and conventional cultivation effect on agronomic behavior between six old and new barley (Hordeum vulgare L.) varieties and estimation of their yield potential. (In Greek with English summary) ' (2006 ) 29 Agricult. Res. (NAGREF) : 41 -52 .
Miller, F.I., Anderson, K.L. 1963. Relationship in winter wheat between lodging, physical properties of stem and fertilizer treatments. Crop Sci. 3 :468–471.
Anderson K.L. , 'Relationship in winter wheat between lodging, physical properties of stem and fertilizer treatments ' (1963 ) 3 Crop Sci. : 468 -471 .
Riggs, T.J., Hanson, P.R., Start, N.D., Miles, D.M., Morgan, C.L., Ford, M.A. 1981. Comparison of spring barley varieties grown in England and Wales between 1880 and 1980. J. Agric. Sci. 97 :599–610.
Ford M.A. , 'Comparison of spring barley varieties grown in England and Wales between 1880 and 1980 ' (1981 ) 97 J. Agric. Sci. : 599 -610 .
Snedecor, G.W., Cochran, W.G. 1980. Statistical Methods. 7 th ed. The Iowa State Univ. Press, Ames, IA.
Cochran W.G. , '', in Statistical Methods , (1980 ) -.
Wych, R.D., Rasmusson, D.C. 1983. Genetic improvement in malting barley cultivars since 1920. Crop Sci. 23 :1037–1040.
Rasmusson D.C. , 'Genetic improvement in malting barley cultivars since 1920 ' (1983 ) 23 Crop Sci. : 1037 -1040 .