การประเมินลักษณะทางกายภาพของข้าวเป็นหมันเนื่องจากอุณหภูมิเพื่อใช้เป็นสายพันธุ์แม่ในการพัฒนาข้าวลูกผสมในประเทศไทย
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Abstract
Abstract
Rice is one of the most important food crops. One approach to improve food production is the use of hybrid rice. The identification and application of the temperature-sensitive genic male sterility (TGMS) system provide a great potential for improving hybrid production because most of TGMS lines are sterile at high temperatures but are fertile at low temperature conditions. In this study, we obtained 7 TGMS lines from International Rice Research Institute (IRRI), Philippines. We evaluated agronomic traits of the 7 exotic TGMS lines, determined adaptability to Thai environments of these exotic TGMS lines, identified temperatures and time for their sterility and fertility in selected areas. Our results showed that these exotic TGMS lines had agronomic traits similar to Thai elite lines. They adapted well to Thai environments in all tested cropping and locations. In central area where we planned for hybrid production, these exotic lines were completely sterile in summer and most of the year, and several of these lines were fertile with reasonable seed setting in winter, suggesting that several of these exotic TGMS lines probably can be used as female parents for hybrid rice development in Thailand.
Keywords: rice; hybrid rice; temperature; anther; sterility, temperature-sensitive genic male sterility (TGMS)
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References
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