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題 名 | 臺灣杉營養芽發育之物候模式--不同營養系在二試驗地之變異=A Phenological Model of Vegetative Bud Development in Taiwania cryptomerioides Hay.--Variation among Different Clones at 2 Sites |
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作 者 | 田玉娟; 郭幸榮; 鍾年鈞; | 書刊名 | 臺灣林業科學 |
卷 期 | 18:3 2003.09[民92.09] |
頁 次 | 頁191-200 |
分類號 | 436.26 |
關鍵詞 | 營養芽; 物候模式; 營養系變異; 生育地效應; 遺傳分化; Vegetative bud; Phenological model; Clonal variation; Site effect; Genetic differentiation; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究乃將有水坑台灣杉種子園中源自和社、大雪山、溪頭等3種源之7個營養系,採集接穗進行再嫁接,將生長表現優良的嫁接木分別隨機分成2組置放於溪頭苗圃(海拔1,050 m)及有水坑種子園(海拔750 m)內之空隙地,觀察營養芽形成、發育及綻放,且記錄二地之氣溫變化,以冷激-熱量和循序模式推算各營養系營養芽綻放之門檻溫度、冷激時數及熱量和。在2000年,二試驗地間或各營養系間之營養芽休眠開始時間相差在2 wk以內,最早為9月23日,最晚為10月8日。在2001年,同一試驗地營養芽之綻放日期,各營養系間差距甚大,最早與最晚綻放之營養系相隔分別為5及3 wk。由物候模式推估得知,7個不同營養系營養芽綻放之門檻溫度皆為10℃,冷激需求量至少為55或58 h,熱量和自9,410至16,387 degree-hrs不等,顯示營養系間在物候特性有遺傳分化,且似與原生育地之海拔有關。另外,同一營養系在二試驗地芽結束外在休眠期所需之熱量和差異不顯著(p>0.05),但同一營養系在二試驗地結束內在休眠之日期差距卻長達1.5~2.5 mo。 |
英文摘要 | Winter bud development was assessed on well growth regrafts of 7 clones of Taiwania (Taiwania cryptomerioides Hay.) which were randomly divided into 2 sites at different elevations: 1,050 m (Chitou) and 750 m (Yeou-Shoei-Keng). Air temperatures were recorded at both sites. The �chilling-heat sum sequential model?was used to estimate the threshold temperature, chilling requirement (h), and heat sum (degree-hrs) for bud burst of each clone. The differences in onset date of bud dormancy between the 2 sites and among the 7 clones in the year of 2000 were less than 2 wk. However, there was a considerable variation in bud burst date between the earliest clone and the latest one, which was as long as 5 wk at Chitou and 3 wk at Yeou-Shoei-Keng. The estimated threshold temperature for all 7 clones was 10℃. The chilling requirement was at least 55 h or 58 h, and the heat sums varied from 9,410 to 16,387 degree-hrs. The results revealed that the clones had undergone genetic differentiation of their phenological characteristics. Comparing individuals of same clone grown at 2 different sites, there was no significant difference in the heat sum for bud burst (p>0.05), but the end dates for releasing endodormancy differed from 1.5 to 2.5 mo. |
本系統中英文摘要資訊取自各篇刊載內容。