玉米銹病之研究

Abstract

本省玉米銹病有普通型及南方型兩種。本研究之目的：一、繼續配合育種計畫進行抗病育種，協助檢定本所現有之種源（包括甜玉米及飼料玉米）及分離培育之材料對兩種銹病之抵抗性。二、探討溫度對夏胞子發芽及存活之影響以保存夏胞子做爲抗病篩選時之接種源及其他研究之用。三、探討本省兩種玉米銹病菌是否有生理小種，做爲抗病育種之指標。四、探討一些殺菌劑對兩種銹病的預防及治療效果做爲藥劑防治之參考。抗病篩選仍採用幼苗測定法在溫室或生長箱內進行。Common rust (Puccinia sorghi) and southern rust (P. polysora) of maize were occurred in Taiwan. This research was attempted: (i) to screen germplasm and segregating breeding lines of dent and sweet corns for resistance to breed rust-resistant and high yield varieties; (ii) to study the effect of temperature on the germination and survival of uredospores for the manipulation of inoculum in the screening and for the preservation of uredospores for further studies; (iii) to explore the physiological races and their distribution, if any, of P. sorghi and P. polysora in Taiwan, and (iv) to evaluate the preventive and curative efficacy of some fungicides for the control of maize rusts.