B. Report of the Committee on Gene Symbolization,

Nomenclature and Linkage Groups

 

N. IWATA, Convener

I. Registration of new gene symbols

The following genes are newly registered:

GENE SYMBOL REGISTRATION No. 131

Registrant: Kazutoshi Okuno and Shuichi Fukuoka (National Institute of Agrobiological Resources, Tsukuba, Japan)
Gene symbol:

hwd1

Gene name: hybrid weakness (complementary)
Character expression: Weakness occurs in F2 from varietal crosses having complementary gene hwd2
Name of origimal line: Col. No. 15
Origin: Thailand
Gene locus: Chromosome 10
Remark: Mapped by linkage to RFLP markers in F2 populations
Reference:

Okuno, K. 1985. RGN 2:54-54.; Fukuoka et al. 1997. Breeding Science 47 (Suppl. l):32.

GENE SYMBOL REGISTRATION No. 132

Registrant: Kazutoshi Okuno and Shuichi Fukuoka (National Institute of Agrobiological Resources, Tsukuba, Japan)
Gene symbol:

hwd2

Gene name: hybrid weakness (complementary)
Character expression: Weakness occurs in F2 from varietal crosses having complementary gene hwdl
Name of origimal line: Sasanishiki
Origin: Japan
Gene locus: Chromosome 7
Remark: Mapped by linkage to RFLP markers in F2 populations
Reference: Okuno, K. 1985. RGN 2:52-54.; Fukuoka et al.. 1997. Breeding Science 47 (Suppl. l):32.

 

GENE SYMBOL REGISTRATION No. 133

Registrant:

Shigetoshi Sato (Coil. Agr., Univ. ofRyukyus, Okinawa, 903- 01 Japan)

Gene symbol: An4
Gene name: Awn-4
Character expression: Incomplete dominance for number of awned spikelets per panicle and awn length
Name of origimal line: T65 Awn or T65 An4, which is an isogenic line ofTaichung 65 with the An4 gene.
Origin: Kokushokuto-2 (A58)
Gene locus: Chromosome 8
Remark: Data on segregations in successive backcrossing F1 and F2 plants for breeding of T65 An4, and linkage data were reported.
Reference: Sato,S.,S.lshikawa,M.ShimonoandC.Shinjyo. 1996. Breeding Science 46:321-327.

GENE SYMBOL REGISTRATION No. 134

Registrant: Yoshimichi Fukuta (Hokuriku National Agricultural Experiment Station. MAFF, Joetsu, Niigata 943-01, Japan)
Gene symbol:

sh4

Gene name: shattering-4
Character expression: Resistance to shattering
Name of origimal line: SR-5 (Hokuriku 143)
Origin: Mutant induced from an Indica type variety, Nan-jing 11, by gamma-ray irradiation to seed.
Gene locus: Chromosome 3
Remark: Data on F2 generation and linkage analysis are reported.
Reference: Fukuta, Y. 1995. Breeding Science 45 (Suppl.l):89.

 

GENE SYMBOL REGISTRATION No. 135

Registrant: Ahn, S.N. (National Crop Experiment Station, RDA, Suweon, Korea)
Gene symbol: Pi18(t)
Gene name: Pyricularia oryzae resistance-18
Character expression: Resistance to Kl-313 race of the blast pathogen isolated in Korea
Name of origimal line: Suweon 365
Gene locus: Chromosome 11
Remark: Mapped by linkage to RFLP markers in an F2/F3 population.
Reference: Ahn, S.N., Y.K. Kirn, S.S. Han, H.C. Choi, H.P. Moon, and S.R.McCouch. 1996. RGN 13:74-76

 

GENE SYMBOL REGISTRATION NO. 136

Registrant: Nagao Hayashi (National Agriculture Research Center, Kannondai 3-1-1, Tsukuba, lbaraki, Japan)
Gene symbol: Pi19(t)
Gene name: Pyricularia oryzae resistance-19
Character expression: Resistance to isolate CHNOS58-3-1 of the blast pathogen Pyricularia grisea.
Gene locus:

Chromosome 12: allelic or closely linked to Pita-2.

Origin: Aichi Asahi
Remark: Data on F2 and F3 lines, and allelism test using F3 lines are reported.
Reference: Hayashi, N., I. Ando, and T. Imbe Phytopathology (to be submitted)

 

GENE SYMBOL REGISTRATION No. 137

Registrant: Tokio Imbe (IRRI, P.O. Box 933, Manila, Philippines)
Gene symbol:

Pi 20

Gene name: Pyricularia oryzae resistance-20
Character expression: Resistance to some races of the blast pathogen Pyricularia grisea
Name of origimal line: IR24
Gene locus:

Chromosome 12; linked to blast resistance gene Pi ta

Remark: Data on F3 lines, BC1 F2 lines, recombinant inbred lines, and allelism test using F3 lines are reported.
Reference: Imbe, T., S. Oba, M. J. T. Yanoria and H. Tsunematsu 1997. RGN 14:60-62