Effects of Inoculum Concentrations on the Resistance of Peanuts to Puccinia arachidis Speg
Other Title
接種源濃度影響落花生對銹病菌之抵抗性
Journal
中華農業研究
Journal Volume
30
Journal Issue
3
Pages
324-331
Date Issued
1981-09-13
Date
1981-09-13
Author(s)
Y.S. Lin
林益昇
Abstract
Four hundred and sixty-one accesions of peanuts were screened for resistance to peanut rust. Three accessions, P. I. 314817, P. I. 259747 and P. I. 315608, showed slow rusting under natural environments in Taiwan. When these accessions were screened in a rust nursery with an inoculum density higher than that in the natural field, the P. Ⅰ. 314817 and P. Ⅰ. 259747 became susceptible while P. I. 315608 remained resistant. Heavy infection occurred on all three accessions when they were inoculated with a spore suspension (200 mg of uredospores/plant) plus a wetting agent (Tween 80) in growth chamber.
本研究篩選461個花生品系對銹病菌之抵抗性，僅P.I.314817，P.I.259747，及P.I.315608三個品系在天然環境下表現緩銹現象（slow rusting），當這三個品系在擁有較天然環境更高量接種源之銹病圃篩選時 P.I.314817及P.I.259747 則變為罹病反應，而P.I.315608仍是抗病反應。又有溫室中以胞子懸浮液加上展著劑（Tween 80）進行接種（200 mg 胞子量／植株），則以上三個品系皆為罹病反應。另外在溫室中以不同濃度（2~200 mg 胞子量／植株）之胞子懸浮液噴到90天株齡的植株上時各品系皆表現不同程度之感染，而且夏胞子堆之產量亦有相當差距。可見銹病菌接種源濃度對各花生品系在感染之數量與病徵之表現扮演著重要角色。
Publisher
農業試驗所
Type
journal article
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