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QTLs for Domestication-related and Agronomic Traits in Temperate Japonica Weedy Rice

이승준|안상낙|서정필|오창식|윤동범
한국육종학회 (The Korean Society of Breeding Science)|2004.03|한국육종학회지 (KOREAN JOURNAL OF BREEDING SCIENCE)|제36권 제1호|pp. 20-30

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참고문헌

주제분류농학

초록

Abstract

This study was conducted to identify the genetic basis of the domestication-related traits in weedy rice. An RIL population consisting of 80 lines was developed from a cross between the japonica weedy rice, Hapcheonaengmi 3 and the Tongil-type cultivar Milyang 23. The population was genotyped with 132 DNA markers, providing an average interval size of 11.0cM, and also evaluated for 20 traits related to domestication and agricultural performance. A total of 48 QTLs and two loci associated with qualitative variation for pericarp and base coloration were identified using single point and interval analysis. The number of QTLs per trait ranged from one to six. These 48 QTLs were located in27 intervals distributed on 11 chromosomes except for chromosome 12. The results indicated that most domestication-related traits clustered in chromosomal blocks, and the positions of many of these clusters were consistent with those reported in previous studies. Phenotypic variation associated with each QTL ranged from 7.5 to 31.9%. For 10 (40%) of the QTLs identified for agricultural performance in this study, the Hapcheonaengmi 3-derived allele contributed a desirable agronomic effect despite the overall undesirable characteristics of the weedy phenotype. Favorable wild alleles were detected for days to heading, panicle exsertion, primary branch number, and leaf discoloration related with cold tolerance. When compared with previous studies involving interspecific crosses, it can be concluded that weedy rice is useful as a source of valuable alleles for rice improvement.

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관련 논문AI추천

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