International Database for Barley Genes and Barley Genetic Stocks
BGS 215, Desynapsis 6, des6
Stock number: BGS 215
Locus name: Desynapsis 6
Locus symbol: des6
Previous nomenclature and gene symbolization:
None.
Inheritance:
Monofactorial recessive (5, 6).
Located in chromosome 1HL (1, 3) or 5HL (1); des6.i is associated with SNP markers 2_0603 to 2_0772 (positions 199.4 to 205.07 cM) in 1H bins 14 to 15 and with SNP markers 2_0127 to 2_0934 (positions 189.10 to 254.07 cM) in 5H bins 10 to 13 of the Bowman backcross-derived line BW244 (1); des6.o is associated with SNP markers 2_0383 to 2_0772 (positions 192.78 to 205.07 cM) in 1H bins 13 to 15 and with SNP markers 2_0127 to 2_1355 (positions 189.10 to 235.0 cM) in 5H bins 10 to 12 of the Bowman backcross-derived line BW245 (1).
Description:
The chromosomes are paired during pachytene and undergo desynapsis during diplotene. The degree of desynapsis is 7.9 ± 2.1 ranging from 7 ring bivalents (d = 0) to 14 univalents (d = 14). Many univalents split longitudinally during anaphase I. Lagging chromosomes and micronuclei are observed frequently at telophase I. Microspore quartets contain an average of 3.3 micronuclei per quartet with a range of 0 to 12. Ovule fertility is about 16%, and about 22% of the selfed seeds are trisomics (3). Compared to Bowman plants of the Bowman backcross-derived line for des6.i, BW244, were slightly shorter. Kernels of BW244 were on average slightly lighter. Grain yields of BW244 were 1/5 to 1/4 those of Bowman (3). Seed set for BW244 and BW245 was 15 to 20% when grown under greenhouse conditions (3).
No images
Origin of mutant:
A spontaneous mutant in Betzes (PI 129430) (5, 6).
Mutational events:
des6.i (GSHO 597) in Betzes (PI 129430) (5, 6); des6.m in OAC 21 (CIho 1740), des6.o in Betzes (4, 6).
Mutant used for description and seed stocks:
des6.i (GSHO 597) in Betzes; des6.i in Bowman (PI 483237)*6 (BW244, NGB 22070); des6.o in Bowman*5 (BW245, NGB 22071).
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 Franckowiak, J.D. (Unpublished).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. Hernandez-Soriano, J.M., and R.T. Ramage. 1973. Coordinator's report. Desynaptic genes. Barley Genet. Newsl. 3:91.
5. Ramage, R.T., and J.M. Hernandez-Soriano. 1971. Desynaptic genes in Betzes barley. Barley Genet. Newsl. 1:38.
6. 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. 3:129.
Revised:
J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:216.
J.D. Franckowiak. 2013. Barley Genet. Newsl. 43:106-107.
