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| Dahl, Bruce L.; Wilson, William W.; Nganje, William E.. |
| Variety development and release decisions involve tradeoffs between yields and characteristics valued by end-users, as well as uncertainties about agronomic, quality, and economic variables. In this study, methods are developed to determine the value of varieties to growers and end-users including the effects of variability in economic, agronomic, and quality variables. The application is to hard red spring (HRS) wheat, a class of wheat for which these tradeoffs and risks are particularly apparent. Results indicate two experimental varieties provide improvements in grower and end-user value, relative to incumbents. Stochastic dominance techniques and statistical tests are applied to determine efficient sets and robustness of the results. A risk-adjusted... |
| Tipo: Journal Article |
Palavras-chave: End-user value; Grower value; Portfolio value; Stochastic dominance; Tradeoffs; Variety development; Wheat; Crop Production/Industries. |
| Ano: 2004 |
URL: http://purl.umn.edu/31141 |
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| Pachara Saengsawong; Supaporn Junbuathong; Piyavadee Charoenwattana. |
| In three-line hybrid rice system, development of parental lines by backcrossing and early generation testing for combining ability is a method used for developing CMS lines (A line) and restorer lines (R line) simultaneously. In this study F3 progenies from 15 crosses of maintainers (B line) were backcrossed to their respective A lines, and 6 crosses and 46 isogenic lines produced. Completely sterile backcross progenies were found in 3 crosses, i.e., IR79156A//IR79156B/CNT1, IR80156A//IR80156B/IR46R and IR80156A//IR80156B/SPR1. Concurrently three new CMS lines, PTT08001A, PTT08002A and PTT08003A were developed. They were then crossed with 5 testers or restorer lines, i.e., RD31, SPR1, CK81, CK120 and CK168. The resulting 15 crosses of F1 hybrid were... |
| Tipo: PhysicalObject |
Palavras-chave: Cytoplasmic male sterile; CMS system; Hybrid rice; A-line; B-line; R-line; Restorer lines; Back crossing; Parental lines; Variety development; Yield trial; ข้าวลูกผสม; ข้าว 3 สายพันธุ์; การผสมกลับ; สายพันธุ์เรณูเป็นหมัน; สายพันธุ์รักษาความเป็นหมัน; สายพันธุ์แก้ความเป็นหมัน; สายพันธุ์พ่อแม่; การพัฒนาสายพันธุ์; ความดีเด่นของลูกผสม; การผลิตข้าว; การทดสอบพันธุ์; สมรรถนะการผสม; ผลผลิต. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5706 |
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