International Database for Barley Genes and Barley Genetic Stocks
BGS 618, Many noded dwarf 3, mnd3
Stock number: BGS 618
Locus name: Many noded dwarf 3
Locus symbol: mnd3
Previous nomenclature and gene symbolization:
Many noded dwarf 3 = mn3 (6).
Many noded dwarf = m3 (5).
Many noded dwarf 3 = mnd3 (3).
Monofactorial recessive (6, 7).
Located in chromosome 4HS likely (1); the largest group of SNP markers associated with mnd3.d includes 2_1056 to 2_0001 (positions 5.42 to 41.26 cM) in 4H bins 01 to 04 of the Bowman backcross-derived line BW519 (1). Previously the mnd3 locus was placed in chromosome 3H (7) over 36.7 cM from the uzu1 (uzu 1) locus (7).
In plants homozygous for the mnd3.d gene, all plant parts are somewhat reduced in size. The number of elongated culm internodes is increased by 1 or 2 compared to normal sibs. Plants are short, 2/3 to 3/4 normal height (2). However, the mnd3.d gene does not reduce fertility and spike appears normal in R.I. Wolfe’s Multiple Marker Stock for chromosome 2H (2). In the Bowman backcross-derived line for mnd3.d, BW519, plants were shorter, 77 vs. 92 cm, and spikes had fewer spikelets, 12 vs. 21. BW519 often showed partial seed set. Kernels of BW519 were smaller, 7.4 vs. 9.9 mm in length and 3.6 vs. 3.8 mm in width, than those of Bowman and weighed less, 42 vs. 58 mg. Grain yields of BW519 were about 20% of those for Bowman (2).
Origin of mutant:
A gamma-ray induced mutant in Montcalm (CIho 7149) (7).
mnd3.d from Montcalm (CIho 7149), but isolated from R.I. Wolfe’s Multiple Marker Stock for chromosome 2H (DWS1346) (2, 3).
Mutant used for description and seed stocks:
mnd3.d from R.I. Wolfe’s 2.1 Multiple Marker Stock crossed to Bowman (GSHO 1797); mnd3.d in Bowman (PI 483237)*7 (GSHO 1949, BW519, NGB 20747).
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 Franckowiak, J.D. (Unpublished).
3. Franckowiak, J.D. 1999. Coordinator’s report: Semidwarf genes. Barley Genet. Newsl. 29:74-79.
4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator’s report: Semidwarf genes. A listing of genetic stocks. Barley Genet. Newsl. 21:116-127.
5. Robertson, D.W., G.A. Wiebe, R.G. Shands, and A. Hagberg. 1965. A summary of linkage studies in cultivated barley, Hordeum species: Supplement III, 1954-1963. Crop Sci. 5:33-43.
6. Walker, G.W., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.
7. Walker, G.W.R., J. Dietrich, R. Miller, and K.J. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.
J.D. Franckowiak. 2002. Barley Genet. Newsl.32:119.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:194-195.