The first letter is any one of the following letters given for the geographical region where the variety was originated from or collected in.

  • A : America and others
  • B : North Africa
  • C : China
  • E & F : Ethiopia
  • I : South-west Asia including India
  • J : Japan
  • K : Korea
  • N : Nepal
  • T : Turkey
  • U : Europe
  • 2.Name

    Variety name

    3.Origin and 4.source

    The "origin" refers to the place where the cultivar was originated, while the "source" shows the place or institution from which it was introduced to our institute.


    The history record of a variety is often accompanied by the following abbreviation that means as indicated:

  • Col. Collected by (a team or person)
  • Intr. Introduced from (a station)
  • Mut. Mutated from (a variety)
  • Rec. Received from (a person)
  • Sel. Selected from (a variety)
  • The numerals in parenthesis indicate the year when the variety was released.

    6.Covered or naked kernel
  • +:covered
  • n:naked
  • 7.Kernel rows
  • 2 : two-rowed
  • 6 : six-rowed
  • D : deficiens
  • L : labile or irregulare
  • 8.Ear-awn type

    Ear-awn type is classified and abbreviated as follows :

    Awn type

    Ear type (density)




    Long awned LL ML DL
    Short awned LS MS DS
    (Normal) hooded LNK MNK DNK
    Elevated hooded LEK MEK DEK
    Subjacent hooded LSK MSK DSK
    Long awned in central row, and awnletted or awnless in lateral rows LLB MLB DLB
    Short awned in central row, and awnletted or awnless in lateral rows LSB MSB DSB
    Awnless or awnletted in central and lateral rows LOB MOB DOB
    Elevated hoods in central row, and awnless in lateral rows LEKB MEKB DEKB
    9.Uzu semi-dwarf or normal
  • uz:uzu semi-dwarf
  • +:normal
  • 10.Leaf-sheath hair
  • 0 : absent
  • 1 : sparse
  • 5 : medium
  • 9 : numerous
  • Two numerals indicate the mixed condition of two types

    11. Leaf tip color (anthocyanin pigmentation)
  • + : present
  • 0 : absent
  • 12. Seedling type
  • E : erect
  • M : medium
  • ME : semi-erect
  • MP : semi-prostrate
  • P : prostrate
  • 13. Heading time

    Earliness Heading time

  • E: mid-April
  • L: early May
  • M: late April
  • VE: early to mid-April
  • VL: mid-May and later
  • 14. Stem length (cm)

    Average of three measurements of stems from ground level to the base of ear or collar
    As the materials for determining the following ear characters, except glume length, five "standard" ears taken from a variety were used.

    15. Ear length (cm)

    The measurement from ear base or colloar to uppermost lemma tip

    16. Awn length (cm)

    Average of 10 measurements of awns taken each from two central spikelets in the middle portion of 5 ears

    17. Glume length (mm)

    Average of 2 measurements of glumes with awn of the central spikelets in the middle portion of an ear

    18. No. of triplets

    Average of five ears

    19. Ear density (mm)

    Average length of rachis internodes excluede 2-3 upper- and lower-most ones

    20. Lemma color
  • AL: albino or white
  • B: black
  • BR: brown
  • O: orange
  • P: purple
  • Y: yellow
  • 21. Kernel color
  • BL: blue or dark blue
  • 22. 1000 kernel weight (g)

    Average of two measurements calculated from number of seeds in 5g samples

    23. Rachilla hair
  • +: long
  • s: short
  • 24. Vernalization requirement
  • 1: highest spring
  • 2: spring
  • 3: intermediate
  • 4-6:winter ones according to the grade of vernalization
  • 25-27. Reaction to powdery mildew races

    Reactions of the cultivars to three major Japanese mildew races, I, IV and IX (Hiura 1960) were determined.

  • R: resistant
  • M: moderately resistant
  • S: susceptible
  • 28. Reaction to BaYMV

    Reaction to a soil-borne virus, BYMV, was investigated using 20 plants of each variety grown in severely infested fields with two replications (Takahashi et al. 1966). Disease symptom was observed three or more times in early spring. The criteria adopted for grading are:

    Mosaic symptom Leaf yellowing
    RR none none
    R slight slight
    M easily discernible evident yellowing in lower leaves
    S severe conspicuous yellowing with some necrosis
    SS very striking heavily stunted, and sometimes die

    29. Brittleness of rachis

    This character is known to be governed by two dominant complementary genes Bt and Bt2 which are semi-allelic and locating on chromosome 3 (Takahashi and Hayashi 1964, Takahashi 1965). Genetic constitution of a variety was investigates using two kinds of F1's from the crosses to two different genotypes,

  • W: bt Bt2 (Occidental type)
  • E: Bt bt2 (Oriental type)
  • 30. Hybrid lethal seedling

    Hybrid lethal seedlings were found to occur in the presence of two complementary dominant genes, Lse and Lsm. The genes are abbreviated in the catalogue,

  • E=Lse
  • e=lse
  • M=Lsm
  • m=lsm
  • 31. Hybrid chlorosis

    Hybrid chlorosis was known to occur in the presence of two dominant complementary genes, Che on chromosome 4 and Cha (Takahashi and Hayashi 1972).

  • A=Cha
  • a=cha
  • E=Che
  • e=che
  • 32. Specific genes or characters

    In this column are listed only those genes or characters which have been established by genetic analyses or close observation. The genes for specific characters ara given in parenthesis with brief explanation.

  • al : albino lemma
  • br : brachytic plant
  • Clt, Clt-2 : leaf-tip color caused by anthocyanin
  • e : wide outer glume
  • ea-c:early heading (ea-c)
  • ea-k:early heading (ea-k)
  • ge:glossy ear
  • gs-1, gs-6 : glossy sheath
  • JMl : mildew resistance
  • K(e):elevated hood
  • l : dense ear
  • lk-2 : short awn
  • r : smooth awn
  • rnt : reduced number of tillers
  • sh, Sh-2, Sh-3 : spring habit of growth
  • sk : subjacent hood
  • V:two-row
  • wx : waxy or glutinous endosperm
  • Ym, Ym-2 : barely yellow mosaic virus resistance
  • 33. Name in Japanese or Chinese

    Name in Japanese or Chinese

    34. Image
    Spike / Seed Image