A unique genetic variation with respect to blast (Pyricularia oryzae Cavara) resistance in rice (Oryza sativa L.) varieties in Vietnam.

IF 2 4区农林科学 Q2 AGRONOMY

Breeding Science Pub Date : 2023-04-01 DOI:10.1270/jsbbs.22073

Ngoc B Nguyen, Nguyet T M Nguyen, Nhai T Nguyen, Linh H Le, Nghia T La, Thuy T T Nguyen, Mary Jeany Yanoria, Nagao Hayashi, Hiroki Saito, Mitsuhiro Obara, Tadashi Sato, Yoshimichi Fukuta

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Abstract

A unique genetic variation with respect to blast resistance was clarified in 201 rice accessions from Vietnam. These accessions were classified into three clusters-A, B1, and B2-based on their reactions to 26 standard differential blast isolates selected in Vietnam. Cluster A was the dominant cultivar group in Vietnam and the most susceptible of the three clusters. Cluster B1 was the smallest group and the most resistant. Cluster B2 was the second-most dominant group and of intermediate resistance between clusters A and B1. The percentages of accessions comprising each cluster varied by region and area. Accessions in cluster A were distributed widely throughout Vietnam and had the highest frequencies in both the Central and North regions. Accessions in cluster B2 were found with highest frequencies in the mountainous and intermediate areas of the North region. Accessions in cluster B1 were found with highest frequencies in the Central region and Red River Delta area (North region). These results suggest that rice accessions in Vietnam were basically susceptible (cluster A) or of intermediate resistance (cluster B2), and that high-resistance cultivars were mainly distributed in the low altitude areas, such as the Red River Delta area and Central region.

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越南水稻品种抗稻瘟病(pyricaria oryzae Cavara)的独特遗传变异

在越南201个水稻品种中发现了一种独特的稻瘟病抗性遗传变异。根据它们对从越南挑选的26种标准差别爆炸分离株的反应，将这些菌株分为a、B1和b2三组。集群A是越南的优势品种群，也是三个集群中最敏感的品种群。簇B1是最小的群体，也是最耐药的群体。B2群为第二优势群，抗性介于A和B1群之间。组成每个群集的加入物的百分比因地区和地区而异。聚类A的物种在越南各地广泛分布，在中部和北部地区的频率最高。B2类植物在北部山区和中部地区的分布频率最高。B1类植物以中部地区和红河三角洲(北部)地区的频率最高。结果表明，越南水稻品种基本敏感(A类)或中等抗性(B2类)，高抗性品种主要分布在低海拔地区，如红河三角洲地区和中部地区。

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来源期刊

Breeding Science 农林科学-农艺学

CiteScore

4.90

自引率

4.20%

发文量

审稿时长

1.5 months

期刊介绍： Breeding Science is published by the Japanese Society of Breeding. Breeding Science publishes research papers, notes and reviews related to breeding. Research Papers are standard original articles. Notes report new cultivars, breeding lines, germplasms, genetic stocks, mapping populations, database, software, and techniques significant and useful for breeding. Reviews summarize recent and historical events related breeding. Manuscripts should be submitted by corresponding author. Corresponding author must have obtained permission from all authors prior to submission. Correspondence, proofs, and charges of excess page and color figures should be handled by the corresponding author.