水稻品種對淡黃化型白葉枯病之抗感病性

Susceptibility of Rice Varieties to Pale-Yellow-Leaf Type of Bacterial Leaf Blight Caused by Xanthomonas oryzae pv. oryzae

謝麗娟(Lih-Jiuan Hsieh) ； 張義璋(Yih-Chang Chang) ； 謝廷芳(Ting-Fang Hsieh)

《台灣農業研究》 56卷1期 (2007/03) Pp. 1-10

https://doi.org/10.6156/JTAR/2007.05601.01

摘要

謝麗娟、張義璋、謝廷芳。2007。水稻品種對淡黃化型白葉枯病之抗感病性。台灣農業研究56:1-10。
本研究於農試所試驗農場測定台灣212株白葉枯病菌菌株在水稻台中秈10號產生淡黃化型病徵之差異，及檢定53個稻品種表現淡黃化型病徵之罹病度。以212株菌株接種水稻，經1999及2000年3期作的試驗結果，有72株菌株可使水稻呈現淡黃化型病徵，其中14株菌株是在1997年首次嚴重發生淡黃化型病害之前所分離之菌株，顯示引起淡黃化型病徵之菌株早已存在台灣。以3株分離自淡黃化型病株和3株原保存分離自葉枯型病株之白葉枯病菌菌株，接種於53個推廣稻品種，經2000及2001年4期作的試驗結果，發現淡黃化型病徵之產生與菌株之致病力和稻品種之抗感病性有關，菌株間與稻品種間亦具交互差異性。自淡黃化型病株分離的菌株引起淡黃化型病徵之能力較強，且其造成之稻品種罹病度大多與其所造成之葉枯型病徵之罹病度間呈正相關，但反之非必然。此病徵型的出現在期作間亦有差異，以第一期作的罹病度較第二期作高。在供試品種中，有27個稻品種對所有供試菌株均不呈現淡黃化型病徵，具高抗病性，而另有10個品種對淡黃化型白葉枯病害為感病性。

關鍵字

淡黃化型白葉枯病 ； 稻品種 ； 抗病性

並列摘要

The ability of 212 Taiwanese isolates of Xanthomonas oryzae pv. oryzae (Xoo) to induce pale-yellow-leaf (PYL) symptom on the rice cultivar Taichung sen 10 and the susceptibility of 53 rice cultivars to express PYL symptom after inoculation with Xoo were studied in the experimental field of Taiwan Agricultural Research Institute (TARI). The results from experiments conducted in three crop seasons of 1999 and 2000 showed that the PYL symptom was observed on the plants inoculated with 72 out of 212 tested isolates. Among the 72 isolates, 14 were isolated before 1997 when the first incidence of PYL symptom was observed on rice in Taiwan, indicating strains that are able to cause PYL symptom have already existed. Three isolates of Xoo from plants showing leaf-blight symptoms and three isolates from plants showing PYL symptoms were used to inoculate 53 rice cultivars in 4 continuous crop seasons of 2000 and 2001. The results revealed that the occurrence of PYL symptoms was associated with the virulence of Xoo isolates and the susceptibility of rice cultivars. The differential interaction between rice varieties and isolates of the pathogen was also observed. The isolates from PYL plants caused more severe PYL symptoms than those from leaf blight plants. In addition, the cultivars with high disease index of PYL symptoms also showed high disease severity of leaf-blight symptoms, but not vis versa. The severity of PYL symptoms in the 1(superscript st) crop was higher than that in the 2(superscript nd) crop. Among 53 cultivars tested, 27 did not show PYL symptoms and were considered as highly resistant to pale-yellow-leaf disease, but 10 cultivars were most susceptible to express PYL symptoms.

並列關鍵字

Pale-yellow-leaf of rice bacterial blight ； Rice varieties ； Disease resistance