Volume 9, Issue 22 (9-2017)
jcb 2017, 9(22): 178-190 |
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(2017). Evaluation of Intra Chromosome and Inter Hemeologous Variations for Grain Yield and Its Components under Non-Stress and Water-Stress Conditions using Wheat Chromosomal Substitution Lines. jcb. 9(22), 178-190. doi:10.29252/jcb.9.22.178
URL: http://jcb.sanru.ac.ir/article-1-851-en.html
URL: http://jcb.sanru.ac.ir/article-1-851-en.html
Abstract: (3922 Views)
This study was conducted to evaluate intra-chromosome and inter hemeologous variations of grain yield and its components using two wheat substitution lines series including substitution lines of ‘Timstein’ into genetic background of ‘Chinese Spring’ and substitution lines of ‘Red Egyptian’ into genetic background of ‘Chinese Spring’ and their parents in a randomized complete block design with four replications under water-stress and non-stress conditions in a greenhouse. Analyses of variance indicated that significant differences exist within chromosomes and hemeologous groups for all studied traits under the both conditions. inter chromosome variations and inter hemeologous variations were significant at the level of 1 and 5 percent of probability, respectively. Homogeneity was performed using Bartlett’s and Levene’s tests for inter chromosomal and intra hemeologous variances. The results of these tests differed in water-stress conditions compared with normal ones. The results of homogeneity tests under non-stress conditions indicated that intra chromosomal homogeneity was significant for grain yield and weight of thousand grains. While under the water-stress conditions, these tests were significant for another two extra characters including harvest index and number of grains per spikelet. Similar to intra chromosome homogeneity, intra hemeologous hemogenety was also performed using Bartlett’s and Levene’s tests. Homologous groups in non-stress condition showed that the variances observed for 1000 seed weight were not homogeneous while variances observed for grain yield and harvest index were non homogeneous in the water-stress conditions. The hemeologous groups of wheat were statistically compared with each other for the characters indicated non homogenous variance using F-test. These comparisons indicated that 2 Homologous group was more effective in controlling variances observed for grain yield, harvest index and 1000 seed weight than other hemeologous groups. So it can be concluded that hemeologous grop 2 has the most important role in controlling the variance of yield and its components.
Keywords: Drought stress, inter-Chromosome variation, Intra Homologous chromosomes
Variations, Substitution lines, Wheat
Type of Study: Research |
Subject:
اصلاح نباتات، بیومتری
Received: 2017/10/9 | Revised: 2017/10/9 | Accepted: 2017/10/9 | Published: 2017/10/9
Received: 2017/10/9 | Revised: 2017/10/9 | Accepted: 2017/10/9 | Published: 2017/10/9
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