Sequential evaluation for field assessment of partial resistance to rice blast

• 발행기관: 한국육종학회
• 저자명: Chong Ho Kim(金鍾昊) Sang Won Ahn(安商元)
• 간행물 정보: 『한국육종학회지』Vol.23 No.2, 31~38쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1991.06.30

영문 초록

High partial resistance is one of the commonly observed features of the cultivars with durable blast resistance. Proper assessment of partial resistance is essential for improving genetic resistance to rice blast. Blast evaluation by sequential planting aims to assess the dynamic consequence of population interaction between host genotype and virulent blast isolates over a prolonged polycyclic association. Nine Tongil-type cultivars developed in Korea were evaluated using sequential evaluation technique in five successive plantings under upland conditions, IRRI, Philippines. The partial resistance of the cultivars having similar reaction to blast in conventional nursery test was clearly differentiated in this experiment. Blast on Taebaeg rapidly increased in the second planting and onwards, while that on Iri 387 increased gradually. The partial resistance of Samgang and Jungweon is comparable to that of IR36, a known cultivar with high partial resistance. Singwang has a slightly lower partial resistance than Samgang. Jangseong, Yongmoon, Yongju and Pungsan have a low partial resistance. Distinct blast populations having different virulence were developed in each cultivar, indicating a selective build-up of virulent isolates in each sequential planting. Sequential planting is suitable for a critical evaluation of partial resistance of test materials in reduced number.

목차

ABSTRACT

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSION

摘要

LITERATURE CITED