International Database for Barley Genes and Barley Genetic Stocks
BGS 519, Many-noded dwarf 1, mnd1
Stock number: BGS 519
Locus name: Many-noded dwarf 1
Locus symbol: mnd1
Previous nomenclature and gene symbolization:
Many noded dwarf = m (3, 5).
Inheritance:
Monofactorial recessive (3, 4, 5).
Located in chromosome 2HS (2, 6, 7);, mnd1.a is over 12.0 cM from the Pre2 (Red lemma and pericarp 2) locus (6); mnd1.a is associated with SNP markers 1_0638 to 1_0624 (positions 86.79 to 96.47 cM) in 2H bin 07 of the Bowman backcross-derived line BW518 (2).
Located in chromosome 2HS (2, 6, 7);, mnd1.a is over 12.0 cM from the Pre2 (Red lemma and pericarp 2) locus (6); mnd1.a is associated with SNP markers 1_0638 to 1_0624 (positions 86.79 to 96.47 cM) in 2H bin 07 of the Bowman backcross-derived line BW518 (2).
Description:
When grown in the field, plants are about 1/2 normal height with numerous tillers. Each tiller has 12 to 20 small leaves and a spike of 1/2 normal size or less. Additional tillers with 4 to 7 leaves may develop at the uppermost tiller nodes, but these secondary and tertiary culm branches develop late and have very small spikes (3). When grown in the greenhouse, plants are taller and later than normal sibs and each tiller may have 15 to 20 nodes. The rate of primordium initiation is normal, but their expansion into leaves is much more rapid (1).
 in Bowman before heading'))
 showing many nodes in the tiller.'))
 tiller showing many nodes.'))
 spikes with poor spike emergence and curled basal rachis internode to the left compared with one normal Bowman spike.'))
 plant with spikes in the boot to the left compared with normal Bowman'))
 spikes with poor spike emergancy to the left compared with normal Bowman'))
Origin of mutant:
A spontaneous mutant (CIho 2328) in Mesa (CIho 1313) (3).
Mutational events:
mnd1.a (GSHO 253, CIho 2328) in Mesa (CIho 1313) (3).
Mutant used for description and seed stocks:
mnd1.a (GSHO 253, CIho 2328) in Mesa; mnd1.a in CIho 6794 and CIho 6871 (tester stocks developed by M. Martini); mnd1.a from R.I. Wolfe’s Multple Recessive Marker Stock for chromosome 2 in Bowman (PI 483237, NGB 22812)*9 (GSHO 2038, BW518, NGB 20746).
References:
1. Cooper, J.P. (Unpublished).
2. 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.
3. Harlan, H.V., and M.N. Pope. 1922. Many-noded dwarf barley. J. Hered. 13:269-273.
4. Hor, K.S. 1922. A new variety of barley with striking characteristics. Science 55:378.
5. Hor, K.S. 1924. Interrelations of genetic factors in barley. Genetics 9:151-180.
6. LeBaron, F.C. 1959. An inheritance and linkage study of 19 factor pairs in barley. M.S. Thesis, Utah State Univ. Pp. 56.
7. Wolfe, R.I. (Personal communications placing mnd1.a in a multiple recessive marker stock for chromosome 2H.)
2. 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.
3. Harlan, H.V., and M.N. Pope. 1922. Many-noded dwarf barley. J. Hered. 13:269-273.
4. Hor, K.S. 1922. A new variety of barley with striking characteristics. Science 55:378.
5. Hor, K.S. 1924. Interrelations of genetic factors in barley. Genetics 9:151-180.
6. LeBaron, F.C. 1959. An inheritance and linkage study of 19 factor pairs in barley. M.S. Thesis, Utah State Univ. Pp. 56.
7. Wolfe, R.I. (Personal communications placing mnd1.a in a multiple recessive marker stock for chromosome 2H.)
Prepared:
J.P. Cooper and J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:446.
Revised:
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:154.
