文章基本信息

标题：Economic Analysis of Breeding for Improved Cold Tolerance in Rice in Australia
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作者：Singh, Rajinder Pal ; Brennan, John P. ; Farrell, Tim 等
期刊名称：Journal of Agribusiness
印刷版ISSN：0738-8950
出版年度：2005
期号：suppl
出版社：Journal of Agribusiness
摘要：The occurrence of low night temperatures during reproductive development is one of the factors most limiting rice yields in southern Australia. Yield losses due to cold temperature are the result of incomplete pollen formation and subsequent floret sterility. Researchers have found that in 75% of years, rice farmers suffer losses between 0.5 and 2.5 t/ha. Research is being undertaken to identify genetic materials that are cold tolerant under the local weather conditions and by using those genotypes as parent material, develop cold tolerance varieties of rice. A yield simulation model was used to measure reduction in losses due to cold at different minimum threshold temperatures, while the SAMBOY-Rice economic model was used to measure the costs and returns of a breeding program for cold tolerance. The results of the economic analysis reveal that incorporating selection for cold tolerance into the breeding program would lead to significant increase in financial benefits through a reduction in losses due to cold and an increase in yield from the better use of nitrogen by the cold tolerant varieties. The returns to investment in the change to the Australian rice breeding program are estimated to be high.
关键词：Rice;Australia;cold tolerance;reproductive development;yield simulation model;SAMBOY-Rice economic model;breeding;nitrogen