Data/hora: 09/06/2024 09:38:55

Provedor de dados: 	Thai Agricultural Research Repository	
País: 	Thailand	
Título: 	การพัฒนาข้าวพันธุ์บางแตนให้ต้านทานโรคไหม้แบบผสมกลับ โดยใช้เครื่องหมายโมเลกุล

Improving Blast Resistance in a Rice Variety 'Bahng Taen'  by Using Marker-assisted Backcrossing	
Autores: 	Reunreudee Kaewcheenchai; Sommai Sriwisut; Apichart Noenplab; Acharaporn Na Lampang Noenplab; Kittima Ruksopa; Peera Dungsoongnern; Udompan Promnart; Nila Rasidee.	
Data: 	2016-02-26	
Ano: 	2015	
Palavras-chave: 	Rice; Blast disease; Backcrossing; Marker-assisted selection; Bahng Taen; ข้าว; โรคไหม้; การผสมกลับ; การคัดเลือกโดยใช้เครื่องหมายโมเลกุล; บางแตน.	
Resumo: 	Blast disease is a major rice disease causing significant rice yield loss worldwide. These are several methods to control this disease, but the most effective and most suitable method is to use blast resistant varieties. Prachin Buri Rice Research Center has released a rice variety ‘Bahng Taen’, which is resistant to blast in the Eastern region. Bahng Taen is a non-glutinous, photoperiod insensitive, early maturity variety with high yielding ability. However, the ability to resist to blast of this variety is declining drastically. It is, therefore, necessary to improve blast resistance in Bahng Taen by introgressing blast resistant genes into its background from two donors; PSL’07F6No.2 and PSL’07F6No.5. These two resistant lines were derived from the cross between Jao Hom Nin (JHN) and IR64. Two crosses were conducted i.e. Bahng Taen x PSL’07F6No.2 and Bahng Taen x PSL’07F6No.5. Once the F1 populations were obtained, they were backcrossed to Bahng Taen in order to obtain BC1F1 populations. The progenies were selected using SSR markers flanking blast resistant genes located on chromosome 1 and 11 i.e. RM212/RM319 and RM224/RM144, respectively. Those heterozygous individuals with good agronomic characters were selected in each generation. Four to five backcrossing were conducted until BC4F1 and BC5F1 populations were obtained. Those populations were then allowed to self-pollinated in order to get segregating populations. Those homozygous individuals with good agronomic characters from BC4F2 and BC5F2 populations were selected. Thirty-six lines of BC4F2 and 22 lines of BC5F2 were obtained from the cross between Bahng Taen x PSL’07F6No.2. Fifty-one lines of BC4F2 and 21 lines of BC5F2 were obtained from the cross between Bahng Taen x PSL’07F6No.5. The total of 130 introgressed lines were selected. The preliminary observation trails were conducted at Prachin Buri Rice Research Center. The results showed that those tested lines had maturity ranging from 111 to 132 days. The plant height was between 102 to 129 centimeters and the panicle weight was between 2.8 to 4.1 grams. The filled grain percentage was between 69 to 85 with a 100-grain weight ranging from 2.7 to 3.2 grams. The blast resistant screening was conducted under field condition at Ratchaburi Rice Research Center. It was found that 26 lines showed highly resistant (HR) while 30 lines showed resistant (R) to blast. However, continuous observation has revealed the non-persistent degree of resistance for most of those lines, excepted for 13 lines of which the moderate to high level of blast resistance were recorded.	
Tipo: 	Collection	
Idioma: 	Thailandês	
Identificador: 	Proceeding of The 32nd Rice and Temperate Cereal Crop  Annual Conference, Petchaburi (Thailand). p. 158-170

ISBN : 978-616-358-091-7

http://anchan.lib.ku.ac.th/agnet/handle/001/5943

เอกสารการประกอบการประชุมวิชาการข้าวและธัญพืชเมืองหนาว ครั้งที่ 32 พ.ศ. 2558, เพชรบุรี, หน้า 158-170	
Formato: 	352 p.	
Fonte: 	ลิขสิทธิ์เป็นของเจ้าของบทความแต่เพียงผู้เดียว

สงวนลิขสิทธิ์ตามพระราชบัญญัติลิขสิทธิ์ พ.ศ. 2537

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