|Budget Amount *help
¥2,300,000 (Direct Cost : ¥2,300,000)
Fiscal Year 1997 : ¥900,000 (Direct Cost : ¥900,000)
Fiscal Year 1996 : ¥1,400,000 (Direct Cost : ¥1,400,000)
1) Petal coloration and pigment constitution in 38 tree peony cultivars (cvs.) from Daikon Island in Shimane Pref.were observed.
Hues of flower color ranged from red through reddish purple to purple in most cvs. Chromas and value ranged from dull to deep or dark in red-flowered cvs., very pale to dull in pink-flowered cvs.and deep to dark in purple-flowered cvs.
As regards pigmentation, both 3,5-diglucoside (3G5G) and 3-glucoside (3G) of pelargonidin (Pg) were dominant in almost all of the red-flowered cvs. Pink-flowered cvs.mainly contained the 3G5G of Pg or peonidin (Pn) but the amounts of anthocyanins were low. In purple-flowered cvs., Pn3G5G was dominant but some deep-colored cvs.had a high Cy3G5G content. Futhermore, as the petal color became bluer, the Pg3G and Pg3G5G contents increased.
Based on the pigmentation in tree peony cvs.from Daikon Island, Pg3G-rich 'Hohki', 'Shin Shima no Kagayaki' and 'Kohki Jishi' are recommended as useful parental cvs.to obtain more vivid red colors, and 'Hohrei' with a high Pn3G5G contant may be used as a parent to obtain bluer colors in future breeding.
2) The cultivars (30 cvs.) with desirable colors were pre-chilled (12ﾟC and 15ﾟC) and forced for December shipping.
Basis on the effects of pre-chilling on the flowering of tree peony for December shipping it is assumed that the cvs.used in this trial are divided into 3 groups ; flowering percentages was (1) improved, (2) lowered, and (3) no or small change.
Of the cvs.forced, 'Kohki Jishi' and 'Hakka Den' pre-chilled at 12ﾟC,'Yatsuka Jishi', 'Shima no Fuji', 'Otome' and 'Shima Daijin' pre-chilled at 15ﾟC,'Shima Musume' pre-chilled at 12 or 15ﾟC and 'Shima no Kagayaki' are recommended for December Shipping.