International Database for Barley Genes and Barley Genetic Stocks

BGS 392, Desynapsis 13, des13

BGN  44:134
Stock number: BGS 392
Locus name: Desynapsis 13
Locus symbol: des13

Previous nomenclature and gene symbolization:

Desynapsis t = des,,t (3, 5).


Monofactorial recessive (3, 5).
Located in chromosome 3H (1); des13.t is associated with SNP markers 1_0886 to 2_1502 (positions 17.49 to 100.48 cM) in 3H bins 02 to 06 and with markers 2_0115 to 1_0747 (positions 126.83 to 144.3 cM) in 3H bins 08 to 09 of the Bowman backcross-derived line BW234 (1).


There are two types of microspore mother cells in mutant plants. About 58% have normal early prophases and undergo desynapsis during diplotene and diakinesis. The average degree of desynapsis is 0.8, ranging from 7 ring bivalents (d = 0) to 4 ring bivalents plus 2 rod bivalents plus 2 univalents (d = 4). The other type of microspore mother cells has chromosomes that appear "sticky" at metaphase I. The stickiness is accompanied by very elongated ring bivalents and by extensive chromosome fragmentation. Ovule fertility is about 20 to 30% (4). Seed set of the Bowman backcross-derived line for des13.t, BW234, was about 50%. Other traits of BW234 were similar to those of Bowman and its grain yields were reduced by about 50% (2).
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Origin of mutant:

A spontaneous mutant in Betzes (PI 129430) (5).

Mutational events:

des13.t (GSHO 604) in Betzes (PI 129430) (3, 5).

Mutant used for description and seed stocks:

des13.t (GSHO 604) in Betzes; des13.t in Bowman (PI 483237)*6 (BW234, NGB22061).


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 Franckowiak, J.D. (Unpublished).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. Hernandez-Soriano, J.M., and R.T. Ramage. 1973. Coordinator's report: Desynaptic genes. Barley Genet. Newsl. 3:91.

4. Hernandez-Soriano, J.M., and R.T. Ramage. 1974. BGS 392, Normal vs. desynapsis 13, des13. Barley Genet. Newsl. 4:141.

5. Ramage, R.T., and J.M. Hernandez-Soriano. 1972. Desynaptic genes in barley. Barley Genet. Newsl. 2:65-68.


J.M. Hernandez-Soriano and R.T. Ramage. 1974. Barley Genet. Newsl. 4:141.


J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:340.
J.D. Franckowiak. 2014. Barley Genet. Newsl. 44:134.