International Database for Barley Genes and Barley Genetic Stocks
BGS 632, Many noded dwarf 5, mnd5
Stock number: BGS 632
Locus name: Many noded dwarf 5
Locus symbol: mnd5
Previous nomenclature and gene symbolization:
Monofactorial recessive (2).
Located in chromosome 7HL (1); mnd5.g is associated with SNP markers 2_0092 to 1_1440 (positions 152.29 to 198.70 cM) in 7H bins 09 to 12 of the Bowman backcrossed-derived line BW521 (1).
When grown in the field, plants are about 1/2 normal height and have numerous tillers. Each tiller has numerous small leaves and a spike of about 1/3 normal size. Plants head late under field conditions. Culm branches with 4 to 7 leaves each may develop at the uppermost culm node, but these branches develop late and have very small spikes. When grown in the greenhouse, plants are tall and late compared with normal sibs. Each culm may have 15 to 20 elongated internodes (2). In field trials, plants of the Bowman backcross-derived line for mnd5.g, BW521, headed 9 to 13 days later than Bowman and were 1/2 to 2/3 the height of Bowman. Peduncles were very short, 3 vs. 25 cm, awns were short, 7 vs.11 cm, and kernels per spike were less, 13 vs. 23. Rachis internodes of BW521 were slightly shorter, 4.1 vs.4.7 mm, and leaf blades were smaller, 3 mm by 11 cm vs. 7 mm by 18 cm for the flag minus one leaves. Kernels of BW521 were smaller, 8.3 vs. 9.4 mm in length and 3.2 vs. 3.8 mm in width, and lighter, 39 vs. 59 mg, than those of Bowman. Grain yields of BW521 were 1/3 to 2/3 of those for Bowman (2).
Origin of mutant:
A spontaneous mutant in the cross C2-95-199 [Logan (PI 592784)/ND15053] (2).
mnd5.g (C2-95-199-1) in C2-95-199 (2).
Mutant used for description and seed stocks:
mnd5.g (C2-95-199-1) in C2-95-199; mnd5.g in Bowman (PI483237)*4 (BW521, NGB 20749).
1. Druka, A., J. Franckowiak, U. Lundqvist, N. Bonar, J. Alexander, K. Houston, S. Radovic, F. Shahinnia, V. Vendramin, M. Morgante, N. Stein, and R. Waugh. 2011. Genetic dissection of barley morphology and development. Plant Physiol. 155:617-627.
2. Franckowiak, J.D. (Unpublished).
J.D. Franckowiak, 2002. Barley Genet. Newsl. 32:133.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:202.