Information on the new genes is presented as follows:
GENE SYMBOL REGISTRATION No. 1
Registrant: Masahiko Maekawa (Fac. Agr. Hokkaido University)
Gene symbol: z-6
Gene name: zebra-6
Character expression: Irregularly spaced yellowish crossbands are kept on leaf blade and sheath through growing period.
Name of original line: AC-100 (progeny derived from the plant which were regenerated by anther culture of F1 plant of the cross, H-50 x N-71.
Gene locus: Linkage group IV
Remark: F2 segregation and linkage data are reported.
Reference: Maekawa 1987 (Pub. list, 84) (Fig. 1)
GENE SYMBOL REGISTRATION No. 2
Registrant: Itsuro Takamure and Toshiro Kinoshita (Fac. Agr. Hokkaido University)
Gene symbol: lk-i
Gene name: 'IRAT 13' long grain
Character expression: Longer grain than that of Fusayoshi (Lk-f) and expressed as a recessive character.
Name of original line: IRAT 13
Remark: Data on F2 segregations and F3 progeny tests showing an independent relation with Lf-k are reported.
Reference: Takamure and Kinoshita 1986, 1987 (168, 170) (Fig. 2)
GENE SYMBOL REGISTRATION No. 3
Registrant: Itsuro Takamure and Toshiro Kinoshita (Fac. Agr. Hokkaido University)
Gene symbol: rcn-2
Gene name: reduced culm number-2
Character expression: Few tillers in both low and high temperature conditions.
Name of original line: N- 174
Origin: Mutants induced by EMS from Shiokari
Remark: Data on F2 segregations and F3 progeny tests showing an independent relation with rcn-I are reported.
Reference: Takamure and Kinoshita 1987 (169)
GENE SYMBOL REGISTRATION No. 4
Registrant: Toshiro Kinoshita (Fac. Agr. Hokkaido Universty) and Harumi Kikuchi (Kamikawa Agr. Exp. Station)
Gene symbol: lam(t)
Gene name: low amylose endosperm
Character expression: Low amylose content in translucent rice grain.
Name of original line: SM- I
Origin: Mutant induced by gamme rays from Shiokari
Gene locus: Linkage group IV, close to I-Bf
Remark: Data on F2 segregation and F3 progeny tests are reported. Tentative symbol (t) was added because its relation with dull genes remains unknown.
Reference: Kikuchi and Kinoshita 1987 (58) (Fig. 3).
GENE SYMBOL REGISTRATION No. 5
Registrant: Toshiro Kinoshita (Fac. Agr. Hokkaido University) and Harumi Kikuchi (Kamikawa Agr. Exp. Station)
Gene symbol: ae-2(t)
Gene name: amylose extender-2
Character expression: High amylose content (> 30%) in white-cored grain.
Name of original line: K-594583
Origin: Mutants induced by the gamma rays from T-214 X K 114, respectively.
Remark: Data on F2 segregation are reported. Tentative symbol (t) was added because of the need for allelism tests with Wxa and ae-1.
Reference: Kikuchi and Kinoshita 1987 (58) (Fig. 4)
GENE SYMBOL REGISTRATION No. 6
Registrant: Kazuyoshi Takeda (Inst. for Agr. and Biol., Okayama University)
Gene symbol: oms
Gene name: open hull male sterile
Character expression: Complete pollen sterility, lower seed fertility (5-20%), smaller caryopsis, darker leaf color and remarkable ratooning.
Name of original line: gl-1-15 M
Origin: Spontaneous mutation from line gl-1-15
Remark: Data on F2 segregation are reported.
Reference: Takeda 1987 (171) (Fig. 5)
GENE SYMBOL REGISTRATION No. 7-9
Registrant: Toshihiro Kumamarui1), Hikaru Satoh1), Nobuo Iwatal1), Takeshi Omura1), Masahiro Ogawa2) and Kunisuke Tanaka3) [1) Fac. Agr. Kyushu, University, ) 2)Res. Inst. Food Sci. Kyoto University, 3) Fac. Agr. Kyoto Pref. University]
Gene symbol: esp-I
Gene name: endosperm storage protein-I
Character expression: The intensity of 13 kD-b polypeptide in seed storage protein is lower than that for the original cultivar.
Name of original line: CM 21
Origin: Mutant induced by a treatment of fertilized egg cells with N-methyl-N-nitrosourea ftom Kinmaze.
Gene locus: Linkage group IV
Gene symbol: esp-2
Gene name: endosperm storage protein-2
Character expression: The intensity of 57 kD polypeptide in seed storage protein is higher than that for the original cultivar.
Name of original line: CM 1787
Origin: Mutant induced by a treatment of fertilized egg cells with N-methyl-N-nitrosourea from Kinmaze.
Gene locus: Linkage group VIII
Gene symbol: esp-3
Gene name: endosperm storage protein-3
Character expression: The intensities of 10 kD and 13a polypeptide in seed storage protein are lower than those for the original cultivar.
Fig. 1. Zebra-6, z-6 (yellow banded leaves)
Fig. 2. 'IRAT 13' long grain, lk-i (left), 'Fusayoshi' long grain, Lk-f (right) and their F1 hybrid (middle).
Fig. 3. Various kinds of endosperm: From left to right, normal, low amylose endosperm, lam(t), dull endosperm, du, chalky, and white core.
Fig. 4. Amylose extender, ae-2(t) (right) and normal type (left).
Fig. 5. Spikelets and grain of open hull male sterile, oms.
Name of original line: CM 1675
Origin: Mutant induced by a treatment of fertilized egg cells with N-methyl-N-nitrosourea from Kinmaze.
Remark (common to No. 7, 8 and 9): Data on F2 segregation and trisomic analysis are report- ed. Independent relations among esp- 1, esp-2 and esp-3 were confirmed.
Reference: Kumamaru et al. 1986, 1987 (73,74)
GENE SYMBOL REGISTRATION No. 1O,11
Registrant: Masahiro Yanol1), Hikaru Satoh2) and Takeshi Omura 2) [1)Hokuriku National Agr. Exp. Station, 2) Fac. Agr., Kyushu University]
Gene symbol: du-4
Gene name: dull endosperm-4
Character expression: dull endosperm, low amylose content
Name of original line: EM-98
Origin: Kinmaze mutant
Gene locus: Linkage group, d-33
Gene symbol: du-5
Gene name: dull endosperm-5
Character expression: dull endosperm, low amylose content
Name of original line: EM-140
Origin: Kinmaze mutant
Remark (common to No. 10 and 11): Data on F2 segregation, allelism tests and trisomic analysis are reported.
Reference: Satoh 1985 (142) and Yano et al. 1987 (submitted to TAG)