International Database for Barley Genes and Barley Genetic Stocks
BGS 387, Desynapsis 8, des8
Stock number: BGS 387
Locus name: Desynapsis 8
Locus symbol: des8
Previous nomenclature and gene symbolization:
None.
Inheritance:
Monofactorial recessive (4, 5).
Located in chromosome 3H (3); des8.l is associated with SNP markers 1_0281 to 2_0168 (positions 98.41 to 173.82 cM) in 3H bins 06 to 11 of the Bowman backcross-derived line BW248 (1); des8.k is associated with SNP markers 1_1401 to 2_1493 (positions 89.73 to 161.43 cM) in 3H bins 06 to 11 of the Bowman backcross-derived line BW247 (1). Both BW247 and BW248 also retained several SNP marker heterogeneities around SNP marker 2_0247 (position 159.73 cM) in 7H bin 11 (1).
Description:
The chromosomes are paired during pachytene and undergo desynapsis during diplotene. The degree of desynapsis was 7.9 ± 2.3, ranging from 7 ring bivalents (d = 0) to 14 univalents (d = 14). Many univalents split longitudinally during anaphase I. Lagging chromosomes and micronuclei were frequently observed at telophase I. Microspore quartets contained an average of 1.2 micronuclei per quartet with a range of 0 to 10. Ovule fertility was about 43% in the des8.k stock, but only about 1% in the des8.l stock (3). Plants of the Bowman backcross-derived line for des8.l, BW248, produced very little seed in most trials, but in one experiment grain yields were 3/4 those of Bowman. Kernels of BW248 were slightly longer than those of Bowman, but weighed about 10% less (2).
No images
Origin of mutant:
A spontaneous mutant in Betzes (PI 129430) (4, 5).
Mutational events:
des8.k (GSHO 599), des8.l in Betzes (PI 129430) (4, 5).
Mutant used for description and seed stocks:
des8.k (GSHO 599) in Betzes; des8.k in Bowman*3 (BW247, NGB 22073); des8.l in Bowman*5 (BW248, NGB 22471).
References:
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 Franckowiak, J.D. (Unpublished).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. 1973. Desynaptic mutants in Betzes barley. M.S. Thesis. Univ. of Arizona, Tucson.
4. Ramage, R.T., and J.M. Hernandez-Soriano. 1971. Desynaptic genes in Betzes barley. Barley Genet. Newsl. 1:38.
5. Ramage, R.T., and J.M. Hernandez-Soriano. 1972. Desynaptic genes in barley. Barley Genet. Newsl. 2:65-68.
Prepared:
J.M. Hernandez-Soriano, R.T. Ramage, and R.F. Eslick. 1973. Barley Genet. Newsl. 3:131.
Revised:
J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:335.
J.D. Franckowiak. 2011. Barley Genet. Newsl. 41:151.
