数字农科院2.0

Identification and Genetic Analysis of a Novel Rice Spotted-Leaf Mutant with Broad-Spectrum Resistance to Xanthomonas oryzae pv. oryzae

文献类型： 外文期刊

作者： SHEN Hai-chao ; SHI Yong-feng +; FENG Bao-hua ; WANG Hui-mei ; XU Xia ; HUANG Qi-na ; Lü Xiang-guang ; WU Jian-li *

作者机构：

关键词： rice;spotted-leaf mutant;hypersensitive response-like;bacterial blight resistance;molecular marker

期刊名称： Journal of Integrative Agriculture

ISSN： 2095-3119

年卷期： 2014 年 13 卷 4 期

页码：

收录情况： JCR（2021版） ; CSCD（2020-2021年度） ; 农林核心（2020版） ; 科技核心（2020版）

摘要： A spotted-leaf mutant of rice HM143 was isolated from an EMS-induced IR64 mutant bank. Brown lesions randomly distributed on leaf blades were observed about 3 wk after sowing. The symptom lasted for the whole plant growth duration. Histochemical analysis indicated that cell death occurred in and around the site of necrotic lesions accompanied with accumulation of hydrogen hyperoxide. Agronomic traits were largely similar to the wild type IR64 except seed setting rate and 1 000-grain weight which were significantly decreased in the mutant. Disease resistance of the mutant to multiple races of Xanthomonas oryzae pv. oryzae was significantly enhanced. Genetic analysis showed that the mutation was controlled by a single recessive gene, tentatively termed spl(HM143) In addition, using molecular markers and 1 023 mutant type individuals from an F-2 segregating population derived from the cross HM143/R9308, the spotted-leaf gene was finally delimited to an interval of 149 kb between markers XX25 and ID40 on the long arm of chromosome 4. spl(HM143) is likely a novel rice spotted-leaf gene since no other similar genes have been identified near the chromosomal region.

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