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研究生:陳鐶斌
研究生(外文):Hwan-Bin Chen
論文名稱:台南白玉米深播耐性之遺傳研究
論文名稱(外文):Studies on Genetics of Deep Seeding Tolerance of Tainan-White Maize Populations
指導教授:謝 光 照 博 士曾 富 生 博 士
指導教授(外文):Guang-Jauh ShiehFu-Sheng Thseng
學位類別:碩士
校院名稱:國立中興大學
系所名稱:農藝學系
學門:農業科學學門
學類:一般農業學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:76
中文關鍵詞:台南白玉米深播耐性
外文關鍵詞:Tainan-White Maize PopulationsDeep Seeding Tolerance
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為以探討台灣不同地區台南白玉米族群在深播環境(12㎝)之幼苗性狀之族群變異,以台灣不同地區台南白玉米族群(台中、雲林、台南、屏東、台東、花蓮、台北及高雄)種植於台中地區繁殖之種子為材料,每個族群逢機選取200粒種子,深播於12公分混合土(砂:泥碳土=2:1)中,播種後十天調查幼苗之中胚軸長度、第一葉葉身、第二葉葉身、第一葉葉鞘、第二葉葉鞘及幼苗株長,八個族群間之幼苗性狀平均值及性狀間相關之程度有不同,再由遺傳歧異度之測量結果顯示,台南白玉米族群具豐富遺傳變異性存在。可知台南白玉米族群之深播特性在不同地區間已有遺傳變異。
然而,不同地區自交系幼苗性狀之評估中由變方分析顯示幼苗之中胚軸長度、第一葉葉身、第二葉葉身、第一葉葉鞘、第二葉葉鞘及幼苗株長,均達顯著差異,而在地區內自交系亦顯示幼苗性狀具有遺傳變異性存在。
分析台南白玉米族群深播性狀之遺傳行為,乃由八個地區族群所分離之12個自交系為親本,進行12 ×12半互交組合之深播試驗。結果顯示所有調查性狀在基因型間均達顯著差異。經組合力分析,發現深播幼苗性狀之表現係由累加性及非累加性基因共同控制,且GCA/SCA均方比值介於4.28-10.72,表示累加性基因之作用較為明顯。由遺傳介量及基因效應分析顯示,幼苗株長之基因顯性作用大於累加性作用,且平均顯性程度為超顯性;其餘性狀的表現則受累加性及顯性基因共同控制,且兩者作用相當,平均顯性程度為完全顯性。中胚軸長度、鞘葉長度、第一葉葉鞘長度及幼苗株長之狹義遺傳率分別為0.51、0.40、0.61及0.31,控制基因群數則分別由2、2、3及4個基因群控制。由顯性方向及大小的比較發現,各性狀之(Yr)與(Wr+Vr)間之相關係數均達顯著負相關,表示控制此等性狀之顯性基因為增量基因。

To study populational variation of seedling characters of Taiwan-white(TNW) maize populations, eight Taiwan-white maize populations collected from Taichung, Yunlin, Tainan, Pingtung, Taitung, Hualien, Taipei and Kaohsiung areas were planted at Taichung, and then, we selected randomly two hundred seeds from every population as materials to sow at 12㎝ and investigate the seedling characters after sowed ten days. The results showed that mesocotyl length, coleoptile length, 1st leaf blade length, 2nd leaf blade length, 1st leaf sheath length, 2nd leaf sheath length and seedling length were significantly different among populations. On the other hand, calculation of the generalized coefficient of phenotypic variation (GCPV) of the variation population reveals richer genetic diversity among the various populations. The results indicate that various Taiwan-white maize populations differ genetically by seedling characters sowed at 12㎝.
However, evaluation of inbred lines of seedling characters in different region, using ANOVA, shows mesocotyl length, coleoptile length, 1st leaf sheath length and seedling length of tested seedling characters have significant difference, and inbred lines within region of population also shows seedling characters have genetic diversity at the same time.
To study on genetics of deep seeding tolerance of TNW maize populations, 12 S5-selected inbred lines from various populations in Taiwan were used in this study. The inbred lines were crossed following a half diallel mating design producing 78 F1. Significant differences in tested traits among genotype were observed. Further the combining ability analysis indicated the tested traits are controlled by additive and non-additive allele, however GCA/SCA ratio is 4.28~10.72, this indicates the additive effect is more important than the non-additive effect in the half diallel analysis. In the gene-effect analysis, the dominant effect of seedling length is more important than the additive effect. Mean degree of dominance on seedling length is over dominance. In the other traits, the additive effect and dominant effect control equally and mean degrees of dominance are completely dominance. Respectively, heritability in narrow sense of mesocotyl length, coleoptile length, 1st leaf sheath length and seedling length are 0.51, 0.40, 0.61 and 0.31. The gene pairs of controlled traits are 2, 2, 3 and 4, respectively. And the dominant gene with the effects of increment.

目 錄
頁次
中文摘要………………………………………………………….. 1
壹、緒言…………………………………… ………………………3
貳、前人研究……………………………………… …………....5
參、材料與方法……………………………… ……… ………..17
肆、結果
(一) 不同地區台南白玉米族群深播耐性之反應………….22
(二) 不同地區台南白玉米自交系深播耐性之評估……… 40
(三) 深播性狀之全互交遺傳分析………………………… 44
伍、討論………………………………………… ……………….64
參考文獻……………………………………………………………67
英文摘要……………………………………………………………76

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