Homeostasis and Genotypic Resultant for the Main Spike Characters of Two-rowed Barely

Volume 18 , Issue 1 , March 2016 , Pages 133-144

Authors

¹ Field Crops Department, Faculty of Agricultural Sciences, University of Sulaimani, Iraqi

Five genotypes of two-rowed barley (Hordeum distichum L.) named MORA, ABN-

B, Arabi Aswad, Clipper and Bohoth H1 with their twenty F 1 progeny were evaluated in

Kurdistan Region-Iraq at three different locations, Erbil-Grdarasha, Garmian-Kalar and

Sulaimani-Qilyasan during the winter season 2011-2012 using Randomized Completely

Block Design (RCBD) with three replications in order to study the homeostasis and

genotypic resultant growth and spike characters. The results revealed highly significant

effects due to genotypes × locations in most of the studied characters with exception of

flag leaf length, spike length, and grin weight / spike. Parent 1 was the best genotype

which had the highest homeostasis values for five characters no. of grain / spike (0.936),

flag leaf length (0.915), peduncle diameter (0.962), spike length (0.933) and no. of

spiklets / spike (0.975), while the hybrid (1×2) had the highest homeostasis values for

three characters flag leaf length (0.985), spike length (0.988), and no. of spiklets / spike

(0.990). So the homeostasis of these genotypes needs to be better evaluated in a set of

environments tested across different years. Very high genotypic resultant values were

obtained for no. of grain / spike (1.135 by the hybrid 2×5), flag leaf length (1.074 by the

hybrid 5×4), spike length and no. of spikelets / spike (1.061 and 1.059, respectively by

the hybrid 2×5) indicating these genotypes having high performances at different

environments and should be not ignored in future studies.

Statistics