Analysis of relative expression levels for OsIAA17q5 and morphological characters in the CNDH lines and parental lines. (a) The expression of OsIAA17q5 in Cheongcheong, Nagdong, CNDH 52-1, CNDH 52-2, CNDH 29, and CNDH 67. Values are means ± SD (n = 3). * p < 0.05, ** p < 0.01 (two-tailed Student’s t-test). (b) Column diagrams showing the number of tillers in 2019 and 2020. ns, no significant difference, (two-tailed Student’s t-test). Statistical comparisons were made using one-way variance analysis/Duncan’s multiple range test. The different letters above the column represent a statistically significant difference at p < 0.05. Values are means ± SD (n = 6) (c) Morphological characters in the CNDH lines and parental lines. (Measuring ruler = 1m).