Coordinator's report: Chromosome 3

T. Konishi
Institute for Agricultural and Biological Sciences
Okayama University
Kurashiki, 710 Japan

In Japan, R. Takahashi and his co-workers have extensively progressed in the linkage analysis of barley, and, as for chromosome 3, the following 17 genes have already established their linkage relationships:

a_c for albino seedling in Colsess I
a_n for albino seedling in Nigrinudum
al for albino lemma
als for absent lower laterals
bt and bt₂ for non-brittle rachis, they are complementary genes tightly linked each other as pseudoalleles
cu2 for curly-2 in Choshiro Hen
Est4 for esterase isozyme-4
gs2 or glossy sheath-2 in OUM 25*
lzd for lazy dwarfness in OUM 5
sca for short and crooked awn in OUM 206
sld for slender dwarf in OUM 148
uz for uzu or semi-brachtyie growth
wst3 for white stripe in Okina-like mutant, and the gene is tightly linked with uz gene
wst,,j for white stripe in OUM 231
x_c for xantha seeding in Colsess IV
yst2 for yellow stripe-2 in F5 (Kuromugi 148 x Mensury C)
*: (OUM: Okayama University Mutant Accession Number)

Fig. 1.Linkage map of chromosome 3 in barley based on the data obtained by Takahashi and his co-workers. The map distances are given in centimorgans (CM).

The author aimed to make clear the orientation of linkage map on chromosome 3, based on our data (see references) as the first step of a new coordinator. The recombination values among genes were estimated by a computer program for the maximum likelihood method developed by Jensen and Jørgensen (1975). The result is indicated in Fig. 1.

References:

Jensen, J. and Jørgensen, J. H. 1975. Hereditas 80:5-16.

Takahashi, R. and Yamamoto, J. 1951. Nogagu Kenkyu 39:126-130.

Takahashi, R. and Hayashi, J. 1959a. Ber. Ohara Inst. Landw. Biol., Okayama Univ. 11:132-140.

Takahashi, R. and Hayashi, J. 1959b. Nogagu Kenkyu 46: 113-119.

Takahashi, R. and Hayashi, J. 1964. Ber. Ohara Inst. Landw. Biol., Okayama Univ. 12:99-105.

Takahashi, R. and Moriya, 1. 1969. Ber. Ohara Inst. Landw. Biol., Okayama Univ. 15:35-46.

Konishi, T., Hayashi, J., Moriya, I. and Takahashi, R. 1984. Ber. Ohara Inst. Landw. Biol., Okayama Univ. 18:251-264.

Konishi, T. and Matsuura, S. 1987.BGN 17:68.

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