Narrative
Spikes have a compact or semicompact appearance caused by a reduction in rachis internode length. Among the alleles at the ert-c locus, rachis internode length had a continuous range from 1.7 to 2.9 mm. The spike has fusiform shape with shorter rachis internodes at the base and longer ones near the apex. The culm length is also highly variable among mutants at the ert-c locus. Mutants ert-c.66 and ert-c.153 are partially sterile, much shorter in culm length, and have a more bushy growth pattern than other mutants at this locus. Spike density is decreased by GA3 treatment of plants as the flag leaf emerges. The Bowman backcross-derived line for ert-c.1 is later and taller than Bowman. Inheritance: Monofactorial recessive. Located in chromosome 3HL, about 3.7 cM from the centromere, and about 2.9 cM proximal from the msg5 (male sterile genetic 5) locus. Previous nomenclature and gene symbolization: Erectoides-1=ert-1. Mutational events: ert-c.1 (trans) in Gull; ert-c.14 (trans) (GSHO 473) in Maja (PI 184884), -c.39, -c.47 (trans), -c.48, -c.59 (trans), -c.62, -c.66, -c.70 (trans), -c.75 (trans), -c.82, -c.83, -c.85, -c.88 in Bonus (PI 189763); ert-c.91, -c.95, -c.97, -c.98, -c.108, -c.137, -c.153, -c.173, -c.177 in Bonus; ert-c.176, ert-c.179, -c.188 in Bonus; ert-c.310, -c.311, -c.312 in Foma (CIho 11333); ert-c.320 in Foma; ert-c.327, -c.342, -c.351 in Foma; ert-c.352 in Foma; ert-c.355a, -c.369, -c.386, -c.395 in Foma; ert-c.463 in Foma; ert-c.495 in Foma. Mutant used for description and seed stocks: ert-c.1 in Gull (GSHO 471); ert-c.1 in Bowman (PI 483237)*7 (GSHO 1960).