International Database for Barley Genes and Barley Genetic Stocks
BGS 183, Yellow node 1, Ynd1
Stock number: BGS 183
Locus name: Yellow node 1
Locus symbol: Ynd1
Previous nomenclature and gene symbolization:
Yellow node = Yn (R.F. Eslick’s collection notes) (1, 2).
Monofactorial incomplete dominant (2).
Located in chromosome 4HS (3); Ynd1.a is based on incomplete data from the Harrington/Morex mapping population (3); linkage drag with the int-c (intermedium spike-c) locus (2); Ynd1.a is associated with SNP markers 1_0409 to 2_1122 (positions 7.91 to 47.80 cM) in 4H bins 01 to 04 of the Bowman backcross-derived line BW923 (1).
Nodes of the culm appear to lack a coating of surface waxes in plants homozygous for the Ynd1.a gene. In heterozygotes, surface waxes may be observed on the upper half of the node. This trait is easier to observe in greenhouse grown plants where surface waxes are not rubbed off by wind caused leaf movements. The Ynd1.a allele is present in many six-rowed cultivars of Oriental origin (2). The glossy node trait is seldom found in two-rowed lines selected from two- by six-rowed crosses because the Ynd1.a allele is closely linked to the dominant intermedium spike-c (Int-c.a) allele, which causes an unacceptable increase in the size of sterile lateral spikelets (2, 3). The plants of the Bowman backcross-derived line for Ynd1, BW923, were similar to Bowman plants except for a slight increase in kernel weight at one site (2).
Origin of mutant:
Naturally occurring in many six-rowed barley cultivars (2).
Ynd1.a (GSHO 1607) in a stock from R.F. Eslick’s collection at Montana State University, Bozeman (2).
Mutant used for description and seed stocks:
Ynd1.a (GSHO 1607) in Morex (CIho 15773, GSHO 2492); Ynd1.a from Sen ‘S’ (GSHO 1605) in Bowman (PI 483237)*6 (GSHO 2363), Ynd1.a from Sen ‘S’ in Bowman*7 (BW923, NGB 22352).
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 Franckowiak, J.D. (Unpublished).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. Kleinhofs, A., and J.D. Franckowiak. (Unpublished).
J.D. Franckowiak. 2002. Barley Genet. Newsl. 32:98.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:109.