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題 名 | Mapping of Quantitative Trait Loci for Plant Height and Heading Date in Two Inter-Subspecific Crosses of Rice and Comparison Across Oryza Genus=水稻株高和抽穗期數量性狀基因座於兩個亞種雜交族群之圖譜 分析及稻屬間之比較 |
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作 者 | 林彥蓉; 吳少鈞; 陳素娥; 曾東海; 陳正昇; 郭素真; 鄔宏潘; 邢禹依; | 書刊名 | Botanical Studies |
卷 期 | 52:1 2011.01[民100.01] |
頁 次 | 頁1-14 |
分類號 | 434.114 |
關鍵詞 | 比較遺傳學; 候選基因策略; 抽穗期; 株高; 數量性狀基因座; 水稻; Comparative genetics; Candidate gene approach; Heading date; Plant height; Quantitative trait locus; QTL; Rice; |
語 文 | 英文(English) |
中文摘要 | 本研究建構兩個水稻亞種間的雜交族群,用於株高與抽穗期之數量性狀基因座圖譜分析,分別以 99個和 95個多型性的 SSR和 STS分子標幟於稉稻台稉 TK8 ×秈稻 IR1545-339和稉稻日本晴 × IR1545339建立遺傳連鎖圖譜,經由組合區間定位法分析和單點分析。於七條和六條染色體上偵測出十個株高和七個抽穗期數量性狀基因座,其中只有 Qph1.2是共通的,主要株高基因座於 TK8/IR1545-339和 Nipponbare/IR1545-339分別可解釋 22.07% (Qph6.1) 和 12.98% (Qph6.2) 之株高變異,而主要抽穗期基因座 Qhd3 則可分別解釋 35.74%和 15.54%之抽穗日數變異。經由於染色體偽分子之物理圖譜進行稻屬間之株高與抽穗期數量性狀基因座之比較分析,本研究發現數量性狀基因座皆與目前已發表之數量性狀基因座具有保守性,隨後利用比較數量性狀基因座的結果與候選基因策略,在未進行高解析之圖譜分析而成功的達到三個株高基因座 (Qph1.2, Qph4, and Qph6.1) 和一個抽穗期基因座 (Qhd10) 之確認,本文並討論區間定位法之正確性。 |
英文摘要 | Two inter-subspecific segregating populations were constructed to map quantitative trait loci (QTLs) for plant height (PH) and heading date (HD) in rice. A total of 99 and 95 polymorphic SSR and STS markers were used to establish linkage maps in japonica TK8 × indica IR1545-339 and japonica Nipponbare × IR1545-339, respectively. By employing composite interval mapping verified by single point analysis, ten PH and seven HD QTLs were located on seven and six chromosomes, respectively; only Qph1.2 and Qhd3 were common in the two populations. The phenotypic variance explained (PVE) by major PH and HD QTLs was 22.07% (Qph6.1) and 12.98% (Qph6.2), and 35.74% (Qhd3) and 15.54% (Qhd3), for TK8/ IR1545-339 and Nipponbare/IR1545-339, respectively. Comparative genetic analysis of QTL intervals on rice pseudomolecules showing the convergence of QTLs affecting PH and HD across the Oryza genus revealed all QTLs uncovered in the two populations possibly allelic to QTLs previously published. By comparative mapping and candidate gene approach, we specified three PH, Qph1.2, Qph4, and Qph6.1, and one HD QTL, Qhd10, without high-resolution mapping, and the reality of QTLs identified by interval mapping were discussed herein. |
本系統中英文摘要資訊取自各篇刊載內容。