Identification of Bacterial Blight Resistance in Perennial Rice
1st author: lipenglin@mail.ynu.edu.cn
Received date: 2020-12-23
Online published: 2021-03-20
Perennial rice （PR）, using vegetative propagation via Rhizome as perenniality donor from Oryza longistaminata, has been bred successfully and demonstrated widely. In order to clarify the resistance performance of perennial rice varieties （lines） to bacterial leaf blight, the perennial rice varieties （lines） PR23, PR24, PR25, PR101, PR107, and their male Oryza longistaminata, female parents RD23 and F1（RD23/ Oryza longistaminata） were used as the materials to evaluate their resistance to bacterial blight by three methods: field disease investigation, resistance level identification and rice bacterial blight resistance gene detection. The results showed that, O. longistaminata presents high resistance to bacterial blight. Although PR23, PR24, PR25, PR107 carry the alleles of bacterial blight resistance genes Xa1, Xa4, Xa23, xa25, but they are all susceptible to bacterial blight in the field. It shows that these resistance genes do not play a role in disease resistance in these four perennial rice varieties （lines）. PR101 shows resistance to bacterial blight under natural disease conditions in the field, and contains the bacterial blight resistance alleles xa25, Xa27, indicating that these two genes may be PR101 resistance genes to bacterial blight. The results provided a basis and strategy for both bacterial blight resistance breeding and application of perennial rice in future.
Key words： perennial rice; bacterial blight; resistance evaluation
Penglin LI, Shiwen QIN, Shilai ZHANG, Guangfu HUANG, Jing ZHANG, Jianping LU, Fengyi HU . Identification of Bacterial Blight Resistance in Perennial Rice[J]. China Rice, 2021 , 27(2) : 63 -67 . DOI: 10.3969/j.issn.1006-8082.2021.02.013
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