EVALUATION OF FLAG LEAF PHYSIOLOGICAL TRAITS OF TRITICALE GENOTYPES UNDER EASTERN MEDITERRANEAN CONDITIONS

Authors : Rukiye KARA

Pages : 67-78

Doi:10.17557/tjfc.66594

View : 19 | Download : 12

Publication Date : 2016-06-01

Article Type : Research Paper

Abstract :The primary objective of the present study is to determine the variations for physiological traits of triticale genotypes. Experiments were carried out in randomized complete block design with 3 replications during the cropping years of 2011-2012 and 2012-2013. Totally 5 cultivars and 20 lines of triticale were used as the plant material of the experiments. The relationships of grain yield with net photosynthesis rate insert ignore into journalissuearticles values(Pn);, stomatal conductance insert ignore into journalissuearticles values(gs);, internal CO2 concentration/ambient CO2 ratio insert ignore into journalissuearticles values(Ci/Ca);, mesophyll conductance insert ignore into journalissuearticles values(Mc);, transpiration efficiency insert ignore into journalissuearticles values(TE);, transpiration rate insert ignore into journalissuearticles values(Tr); and the leaf temperature insert ignore into journalissuearticles values(Tl); were assessed through correlation and biplot analyses. For all three growth stages insert ignore into journalissuearticles values(booting, anthesis, grain filling);, significant positive correlations were observed between Tr and Tl; gs and Tr; gs and Pn; gs and Ci/Ca and Mc and Pn, and the greatest negative correlations were observed between TE and Tl. Current findings were not able indicate a single physiological trait has significant correlations with grain yield in all growth stages. However, significant negative correlations were observed between grain yield and Tl-Tr at booting and anthesis stages. It was concluded that low temperature, high net photosynthesis rate, high Ci/Ca and low transpiration rate might be used as reliable selection criteria in further triticale breeding programs. 
Keywords : Correlation, flag leaf, gas exchange parameters, grain yield, triticale