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Asahinoyume

The varieties used in the cross: Tsukinohikari, Aichi No.65, Aichinokaori. Cross combination: 愛知70号//愛知56号/愛知65号. Crossed in 1985.

Aichi No.93 AIC0000930

Pedigree

Skip the diagram and read the list
Norin No.22 → Koshihikari Norin No.1 → Koshihikari Norin No.8 → Norin No.22 Norin No.6 → Norin No.22 Moritawase → Norin No.1 Rikuu No.132 → Norin No.1 Ginbozu → Norin No.8 Asahi → Norin No.8 Joshu → Norin No.6 Sen'ichi → Norin No.6 Rikuu No.20 → Rikuu No.132 Kamenoo No.4 → Rikuu No.132 Aikoku → Rikuu No.20 Koshihikari → Kanto No.79 Kanto No.79 → Mineasahi Mineasahi → Aichinokaori Aichinokaori → Asahinoyume Norin No.8 → Hatsushimo Higashiyama No.24 → Hatsushimo Hatsushimo → Aichinokaori Tsukinohikari → Asahinoyume Aichi No.65 → Asahinoyume 40-11 → Mineasahi Asahinoyume Aichi No.93 ・ 1% Aichinokaori Aichi No.70 ・ 0.8% Tsukinohikari Aichi No.56 Aichi No.65 Mineasahi Chubu No.17 Hatsushimo Higashiyama No.50 ・ 0.7% Norin No.8 Kinki No.15 Higashiyama No.24 Ginbozu Asahi Kanto No.79 40-11 Koshihikari Etsunan No.17 ・ 32.6% Norin No.22 Kinki No.34 Norin No.1 Hokuriku No.4 Moritawase Rikuu No.132 Rikuu No.20 Kamenoo No.4 Aikoku Norin No.6 Kinki No.9 Joshu Sen'ichi
The diagram shows this variety's own parents and the line that connects it to Koshihikari. Among the descendants only the main varieties are drawn; the other parent of each cross, and every descendant not drawn here, are listed in full below. Faint boxes are unnamed breeding lines.

Parents

Cross combination: 愛知70号//愛知56号/愛知65号

Descendants

Relations are counted along the shortest line of descent. The rows in the diagram follow the order of crosses, so a variety with more than one path down can sit lower in the diagram than its relation here suggests.

Born in Aichi, became Tochigi's mainstay

The cross for Asahinoyume is written in both the Tochigi Prefectural Agricultural Experiment Station's document and NARO's research results.

Bred from a cross with "Aichi No.70" as the seed parent and the F₁ of "Aichi No.56" / "Aichi No.65" as the pollen parent. Crossed in Showa 60 with "Aichi No.70 (Aichinokaori)" as the seed parent and the F1 of "Aichi No.56 (Tsukinohikari)" and "Aichi No.65" as the pollen parent

1985, the Aichi Agricultural Research Centre. The seed parent Aichinokaori is a variety still grown today.

Because it is a three-way cross, what stands as the pollen parent is the F1 of Aichi No.56 (Tsukinohikari) and Aichi No.65. In the list above, these three are set out together as the parents of the cross.

The prefecture that adopted it was not the one that bred it

Tochigi Prefecture adopted Asahinoyume as a recommended variety in February 2000. Today the centre of Tochigi's planted area is this variety and Koshihikari.

Eating quality is superior to Tsukinohikari and slightly superior to Hatsuboshi — a good eating quality It is resistant to rice stripe disease Cold tolerance is at the same level, "weak"

Cold tolerance is written down as "weak". Even so it spread as a mid-season variety in the double-cropping belt. If the conditions of the land where it is grown suit it, a variety survives in spite of a weakness.

Share of paddy rice area in the 2024 crop: 1.0%.

We have not yet been able to read the breeding prefecture's report

What is written on this page comes from the Tochigi Prefectural Agricultural Experiment Station and NARO's research results. For the breeding report of Aichi Prefecture itself, which bred the variety (Research Bulletin of the Aichi Agricultural Research Centre, No.33, 2001), we have only been able to obtain the bibliographic information, and have not been able to check the text.

Which parent was the seed parent and which the pollen parent is recorded here because the two documents above agree on it. But on the breeding objective, we have not yet been able to read the breeding prefecture's own words, so nothing is written here.

Sources disagree

Which parent of Koshihikari was the seed parent

The NARO historical document states in words that Norin No.22 was the seed parent and Norin No.1 the pollen parent. Niigata Prefecture, which bred the variety, states the reverse. The diagram follows the historical document; Niigata's account is recorded here. We call neither wrong.

The year of the cross

The NARO documents appear to reproduce the prefectures' original applications for recommended-variety status and give 1945 — and the documents for Honenwase, Hatsunishiki and Yamasenishiki, all from the same cross, give 1945 as well, four in agreement. Niigata's own account says the cross was made in 1944 and that the 1945 planting was skipped for lack of hands. We use 1944 and note the discrepancy.

How the seed parent of Norin No.1 is written

The two spellings appear in the same NARO database, in the pedigree field and in the historical document respectively. We use the pedigree field's spelling and list the other.

How Kamenoo No.4 is written

We follow the NARO database. The commonly seen spelling uses a katakana no; we prefer the spelling we can cite.

On naming

Variety names are proper nouns. We use a name in this language only where a published source for it can be cited; otherwise the Japanese name stands.

What we have not yet confirmed

We have not looked below the top twenty

The site covers the twenty most widely planted varieties of the 2024 crop and the varieties that connect them back to Koshihikari. Many descendants exist below that line; we have not yet verified them against primary sources.

The year Masshigura was crossed

Neither Aomori Prefecture's table of recommended-variety characteristics nor the NARO database gives the year Masshigura (Aokei No.138) was crossed. The cross itself, Ou No.341 / Yamagata No.40, and its adoption as a recommended variety in fiscal 2004 are confirmed from primary sources; the year of the cross is not. For the same reason we do not say which parent was the seed parent. On 8 October 2026 we went back to the breeder's own side. The Masshigura page in the variety database of the Aomori Prefectural Industrial Technology Research Center's Agriculture and Forestry Research Institute carries a heading reading “The origin of Masshigura” — with nothing under it. Of the institute's bulletins, only No.42 (2015) onward are online, and the issue that would hold the breeding report for Masshigura is not among them. So the year of the cross is absent from the breeder's own published material as well.

Sources

The source document is in Japanese.

  1. イネ品種データベース検索システム「越南17号（コシヒカリ）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  2. イネ品種データベース検索システム 交配系譜図「越南17号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  3. イネ品種データベース検索システム「北陸4号（水稲農林1号）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  4. イネ品種データベース検索システム 交配系譜図「北陸4号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  5. イネ品種データベース検索システム「北陸4号を親とする品種一覧」（全263行） — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01
  6. イネ品種データベース検索システム「越南17号を親とする品種一覧」（全607行） — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01
  7. イネ品種データベース検索システム 交配系譜図「近畿34号（水稲農林22号）」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01
  8. イネ品種データベース検索システム 交配系譜図「近畿15号（水稲農林8号）」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  9. イネ品種データベース検索システム 交配系譜図「近畿9号（水稲農林6号）」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  10. イネ品種データベース検索システム 交配系譜図「陸羽132号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  11. イネ品種データベース検索システム 交配系譜図「陸羽20号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  12. コシヒカリのエピソード1 〜交配から系統の育成まで〜 — Niigata Prefectural Government ・ primary source ・ accessed 2026-09-10
  13. 新潟コシヒカリの軌跡 〜誕生から定着に至るまで〜 — Niigata Prefectural Government ・ primary source ・ accessed 2026-09-10
  14. 戦後日本のイノベーション100選「コシヒカリ」経緯 — Japan Institute of Invention and Innovation ・ accessed 2026-09-10
  15. 令和6年産 水稲の品種別作付割合 — Rice Stable Supply Support Organization ・ primary source ・ accessed 2026-09-10
  16. イネ品種データベース検索システム 交配系譜図「関東79号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  17. イネ品種データベース検索システム 交配系譜図「中部17号」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  18. イネ品種データベース検索システム 交配系譜図「愛知70号（あいちのかおり）」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  19. イネ品種データベース検索システム「愛知70号（あいちのかおり）を親とする品種一覧」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-10
  20. あきさかりの良さを引き出す栽培法 — Fukui Prefectural Government ・ primary source ・ accessed 2026-09-10
  21. ぎふクリーン農業／県産品種 ハツシモ — Gifu Prefectural Government ・ primary source ・ accessed 2026-09-11
  22. 水稲「あさひの夢」の奨励品種採用（研究成果情報） — National Agricultural Research Center, NARO ・ primary source ・ accessed 2026-09-11
  23. コシヒカリのエピソード2 〜奨励品種への採用から〜 — Niigata Prefectural Government ・ primary source ・ accessed 2026-09-10
  24. コシヒカリBLの導入のねらい — Niigata Prefectural Government ・ primary source ・ accessed 2026-09-10
  25. イネ品種データベース検索システム「中部17号（ミネアサヒ）を親とする品種一覧」 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-11
  26. イネ品種データベース検索システム「東山50号（ハツシモ）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-11
  27. 水稲新奨励品種「あさひの夢」の特性 — Tochigi Prefectural Agricultural Experiment Station ・ primary source ・ accessed 2026-09-11
  28. あいちの農産物 穀類・茶 — Aichi Prefecture ・ primary source ・ accessed 2026-09-11
  29. イネ品種データベース検索システム「近畿15号（水稲農林8号）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-16
  30. イネ品種データベース検索システム「近畿9号（水稲農林6号）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-09-16
  31. イネ品種データベース検索システム「越南12号（ヤマコガネ）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01
  32. イネ品種データベース検索システム「山陰47号（ヤエホ）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01
  33. イネ品種データベース検索システム「中部17号（ミネアサヒ）」品種来歴文書 — Institute of Crop Science, NARO ・ primary source ・ accessed 2026-10-01