玉米成株抗葉斑病之全互交分析
Other Title
Diallel Analysis of Mature Plant Resistance to Helminthosporium maydis in Maize
Journal
中華農業研究
Journal Volume
42
Journal Issue
1
Pages
12-18
Date Issued
1993-03-02
Date
1993-03-02
Author(s)
謝光照
盧煌勝
Guang-Jauh Shieh
H.S. Lu
Abstract
六個玉米自交系親本及其十五個單交組合，於1991年秋作及1992年春作，利用田間自然感染，進行玉米開花後之成株對葉枯病（Helminthosporium maydis race 0）抗病性之遺傳分析。目交系發病等級在期作間相當一致，六個自交系中，Antigua-2D及Sw654對葉枯病具有極高的抗病性。組合力分析結果顯示，抗病性係由累加性及非累加性基因所共同控制，其中又以累加性佔極大之比例。本研究建議：利用譜系法或輪迴選種法，改良玉米成株葉枯病之抗病性，當可獲得較顯著之效果。
Six inbreds and their fifteen single cross hybrids were evaluated in fall of 1991 and spring of 1992 under natural epiphytotics for mature plant resistance to southern corn leaf blight (Helminthosporium maydis＝Bipolaris maydis) race 0. Inbred line Antigua-2D and Sw654 showed the highest level of resistance. Resistance of the inbred lines to H. maydis was consistent between crop seasons. Both general (GCA) and specific (SCA) combining ability were highly significant for resistance in fall and spring crop seasons. Additive effects were accounted for major part of the total variation. This result indicated that pedigree or recurrent selsction methods should be effective in breeding for improved resistance to southern corn leaf blight.
Subjects
葉枯病
全互交分析
一般組合力
特殊組合力
雜種優勢
Southern corn leaf blight
Diallel analysis
General combining ability
Specific combining ability
Heterosis
Publisher
農業試驗所
Type
journal article
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