Analysis of Control Mechanism of Flowering in Late Heading Meadow Fescue (Festuca pratensis Huds.) Strain with Lower Seed Production

• Takai Tomoyuki

  Nagano Animal Industry Experiment Station

• Sanada Yasuharu

  National Agricultural Research Center for Hokkaido Region

• Yamada Toshihiko

  National Agricultural Research Center for Hokkaido Region

Bibliographic Information

Other Title

• 採種性の低いメドウフェスク晩生系統における出穂特性への影響要因の解明
• サイシュセイ ノ ヒクイ メドウフェスク バンセイ ケイトウ ニ オケル シュッスイ トクセイ エ ノ エイキョウ ヨウイン ノ カイメイ

Abstract

In many temperate grasses, the late heading cultivars/strains show better persistence than the early heading ones under grazing condition, but the former is disadvantage for seed production because of its few number of heads. It is important to identify the factors influencing the increase of head number. Recently, meadow fescue (Festuca pratensis Hud.) has been paid attention as a promising grazing species in the eastern Hokkaido because of its better regrowth compared to timothy. To clarify the effect of major environmental factors a comparison between extremely late heading strain 'Hokkai 9' and early heading cultivar 'Tomosakae' was carried out to evaluate heading characters at juvenile, primary (by low temperature) and secondary (by long photoperiod) inductive stage. As results, 'Hokkai 9' had juvenile stage at fall season condition (low temperature and short day-length), but 'Tomosakae' had no, or a very short, juvenile stage at same condition. Primary inductive duration whose 'Hokkai 9' was for 21 weeks at 6℃ with 8h photoperiod was longer three weeks than that of 'Tomosakae'. Though 'Hokkai 9' was suppressed for heading at 24/19℃ with 16h photoperiod at secondary induced, 'Tomosakae' continued heading at same condition. 24h photoperiod allowed to promote earliness of heading in both accessions, but therewas a difference for days between them. 'Hokkai 9' bred from Finish cultivar 'Tammisto' appears to be not adapted for heading characters at the middle latitude area such as Hokkaido, with shorter day length and higher temperature. Late cultivars / strains such as 'Hokkai 9' are essential for seed production to require enough duration of vernalization (6℃, 21 months) and condition of low temperature (15℃) with long-day length (above 14 hours-day length) at the second inductive stage.

Journal

• Japanese Journal of Grassland Science

  Japanese Journal of Grassland Science 50 (5), 408-414, 2004

  Japanese Society of Grassland Science

Keywords

• Floral induction
• Juvenility
• Meadow fescue
• Photosensitivity
• Thermosensitivity

Details

• CRID: 1390001205754407040
• NII Article ID: 110003850835
• NII Book ID: AN00194108
• DOI: 10.14941/grass.50.408
• ISSN: 21886555
• ISSN: 04475933
• NDL BIB ID: 7221668
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010710213
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7221668
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed