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RISS 인기검색어
- 검색키워드
- 저자 : Cabunagan, Rogelio C. (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Suppression of two tungro viruses in rice by separable traits originating from cultivar Utri Merah.
Encabo, Jaymee R,Cabauatan, Pepito Q,Cabunagan, Rogelio C,Satoh, Kouji,Lee, Jong-Hee,Kwak, Do-Yeon,De Leon, Teresa B,Macalalad, Reena Jesusa A,Kondoh, Hiroaki,Kikuchi, Shoshi,Choi, Il-Ryong APS Press 2009 Molecular plant-microbe interactions Vol.22 No.10
<P>Rice tungro disease (RTD) is caused by Rice tungro spherical virus (RTSV) and Rice tungro bacilliform virus (RTBV) transmitted by green leafhoppers. Rice cv. Utri Merah is highly resistant to RTD. To define the RTD resistance of Utri Merah, near-isogenic lines (NIL, BC(5) or BC(6)) developed from Utri Merah and susceptible cv. Taichung Native 1 (TN1) were evaluated for reactions to RTSV and RTBV. TW16 is an NIL (BC(5)) resistant to RTD. RTBV was able to infect both TN1 and TW16 but the levels of RTBV were usually significantly lower in TW16 than in TN1. Infection of RTSV was confirmed in TN1 by a serological test but not in TW16. However, the global gene-expression pattern in an RTSV-resistant NIL (BC(6)), TW16-69, inoculated with RTSV indicated that RTSV can also infect the resistant NIL. Infection of RTSV in TW16 was later confirmed by reverse-transcription polymerase chain reaction but the level of RTSV was considerably lower in TW16 than in TN1. Examination for virus accumulation in another NIL (BC(6)), TW16-1029, indicated that all plants of TW16-1029 were resistant to RTSV, whereas the resistance to RTBV and symptom severity were segregating among the individual plants of TW16-1029. Collectively, these results suggest that RTD resistance of Utri Merah involves suppression of interacting RTSV and RTBV but the suppression trait for RTSV and for RTBV is inherited separately.</P>
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Shim, Junghyun,Torollo, Gideon,Angeles-Shim, Rosalyn B.,Cabunagan, Rogelio C.,Choi, Il-Ryong,Yeo, Un-Sang,Ha, Woon-Goo 日本育種學會 2015 Breeding science Vol. No.
<P>Rice tungro disease (RTD) is one of the destructive and prevalent diseases in the tropical region. RTD is caused by <I>Rice tungro spherical virus</I> (RTSV) and <I>Rice tungro bacilliform virus</I>. Cultivation of japonica rice (<I>Oryza sativa</I> L. ssp <I>japonica</I>) in tropical Asia has often been restricted because most japonica cultivars are sensitive to short photoperiod, which is characteristic of tropical conditions. Japonica1, a rice variety bred for tropical conditions, is photoperiod-insensitive, has a high yield potential, but is susceptible to RTD and has poor grain quality. To transfer RTD resistance into Japonica1, we made two backcrosses (BC) and 8 three-way crosses (3-WC) among Japonica1 and RTSV-resistant cultivars. Among 8,876 BC<SUB>1</SUB>F<SUB>2</SUB> and 3-WCF<SUB>2</SUB> plants, 342 were selected for photoperiod-insensitivity and good grain quality. Photoperiod-insensitive progenies were evaluated for RTSV resistance by a bioassay and marker-assisted selection (MAS), and 22 BC<SUB>1</SUB>F<SUB>7</SUB> and 3-WCF<SUB>7</SUB> lines were selected based on the results of an observational yield trial. The results demonstrated that conventional selection for photoperiod-insensitivity and MAS for RTSV resistance can greatly facilitate the development of japonica rice that is suitable for cultivation in tropical Asia.</P>
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