International Database for Barley Genes and Barley Genetic Stocks

BGS 321, Short rachilla hair 1, srh1

BGN  46:86
Stock number: BGS 321
Locus name: Short rachilla hair 1
Locus symbol: srh1

Previous nomenclature and gene symbolization:

Short rachilla hairs = l (2, 7).
Short-haired rachilla = s (13).
Short glume hairs = gh (16).


Monofactorial recessive (1, 5, 15).
Located in chromosome 5HL (12, 13, 14); srh1.a is about 35 cM from the raw1 (smooth awn 1) locus (6); srh1.a is about 26.8 cM proximal from the raw1 (smooth awn 1) locus (9, 11, 13, 14); srh1.a is closely linked to and proximal from SSR maker Bmag223 (3, 10); srh1.a is 4.0 cM from SSR marker Bmag223 (8); srh1.a is associated with SNP markers 2_1001 to 2_0850 (positions 116.66 to 157.13 cM) in 5H bins 07 to 09 of the Bowman backcross-derived line BW873 (4), likely in 5H bin 08.


Long rachilla hairs are unicellular, while short rachilla hairs are multicellar and branched (17). Short rachilla hair is associated with short pubescence on the glumes and rachis (2, 5, 7). Plants of the Bowman backcross-derived line for srh1.a, BW873, were similar to Bowman in maturity and grain yield (6).

Origin of mutant:

Natural occurrence in in landraces of Middle Eastern origin (8); in the cultivar Lion (CIho 923, PI 32767) (7).

Mutational events:

srh1.a in Lion (GSHO 27, CIho 923, PI 32767) (2, 5); srh1.a in Plumage (CIho 2511) (5, 13). The stock maintained as Lion (PI 32767) does not have short rachilla hairs. The rachilla hair trait of GSHO 27 and CIho 2238 was not determined.

Mutant used for description and seed stocks:

srh1.a in Lion (GSHO 27; srh1.a via R.I. Wolfe’s Multiple Recessive Marker Stock (GSHO 3451) in Bowman (PI 483237)*7 (GSHO 2108, BW873, NGB 22307).


1. Biffen, R.H. 1907. The hybridization of barleys. III. J. Agric. Sci. 2:183-206.
2. Buckley, G.F.H. 1930. Inheritance in barley with special reference to the color of the caryopsis and lemma. Sci. Agric. 10:460-492.
3. Costa, J.M., A. Corey, M. Hayes, C. Jobet, A. Kleinhofs, A. Kopisch-Obusch, S.F. Kramer, D. Kudrna, M. Li, O. Piera-Lizaragu, K. Sato, P. Szues, T. Toojinda, M.I. Vales, and R.I. Wolfe. 2001. Molecular mapping of the Oregon Wolfe Barleys: a phenotypically polymorphic doubled-haploid population. Theor. Appl. Genet. 103:415-424.
4. 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.
5 Engledow, F.L. 1920. Inheritance in barley. I. The lateral florets and rachilla. J. Genet. 10:93-108.
6. Franckowiak, J.D. (Unpublished).
7. Hor, K.S. 1924. Interrelations of genetic factors in barley. Genetics 9:151-180.
8. Javaid, A., S. Ikeda, I. Kataka, and S. Taeta. 2009. Fine mapping of the short rachilla hair gene (srh) in barley and an association study using Flanking molecular markers and world germplasm. Asian J. Plant Sci. 8:400-406.
9. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. In M.J.C. Asher, R.P. Ellis, A.M. Hayter, and R.N.H. Whitehouse (eds.) Barley Genetics IV. Proc. Fourth Int. Barley Genet. Symp., Edinburgh. Edinburgh Univ. Press, Edinburgh.
10. Kraakman, A.T.M., F. Martinez, B. Mussiralie, F.A.V. Eeuwijk, and R.E. Nils. 2006. Linkage disequilibrium mapping of morphological, resistance and other agronomically relevant traits in modern spring barley. Mol. Breed. 17:41-58.
11, Nilan, R.A. 1964. The Cytology and Genetics of Barley, 1951-1962. Monographic Supplement No. 3 Research Studies. Washington State University Press.
12. Ramage, R.T., and C.A. Suneson. 1961. Translocation-gene linkages on barley chromosome 7. Crop Sci. 1:319-320.
13. Robertson, D.W., G.A. Wiebe, and F.R. Immer. 1941. A summary of linkage studies in barley. J. Am. Soc. Agron. 33:47-64.
14. Robertson, D.W., G.A. Wiebe, and R.G. Shands. 1955. A summary of linkage studies in barley: Supplement II, 1947-1953. Agron. J. 47:418-425.
15. Ubisch, G. von. 1916. Beitrag zu einer Faktorenanalyse von Gerste. Z. Indukt. Abstammungs. Vererbungsl. 17:120-152.
16. Waddoups, H.M. 1949. A study of semisterility and its linkage relationships in translocation stocks of barley. M.S. Thesis. Utah State Agr. Coll., Logan.
16. Ziegler, A. 1920. Variationen in der Form der Basalborste. Missbildungen und Abänderungen am Typus und deren Vererbung. I11. Landw. Z. 40:237-238.


T.E. Haus. 1978. Barley Genet. Newsl. 8:160 as BGS 312, Short-haired rachilla, s.


J.D. Franckowiak. 1997. Barley Genet. Newsl. 26:269.
J.D. Franckowiak. 2016. Barley Genet. Newsl. 46:86-87.