Calculating Safety-first Index of Quality Traits of Winter Wheat Using R Language

doi:10.11924/j.issn.1000-6850.casb17040129

Abstract

Abstract: This paper aims at providing a convenient method for calculating“safety-first index”(SFI), and perfecting an evaluation system of winter wheat quality traits’stability. A procedure (Safety) for calculating SFI was designed using the R language. Using one set of winter wheat dough stability time data, the usage of the Safety was introduced, and the reliability of the program was verified. The results showed that, the Safety,whose results were in full agreement with the Electronic Spreadsheet, was convenient and efficient. It only needed a data object to be analyzed and an acceptable risk ratio (α ), Safety could calculate the mean value, confidence interval, Shukla variance, environmental variance and SFI of the varieties. Because the variance component estimation method of the Safety procedure was the analysis of variance, the estimation of the variance component might be negative. In summary,SFI can describe quality traits’stability and attainment rate quantitatively. The Safety procedure will contribute to the extension ofSFI in stability analysis of winter wheat varieties’quality traits.

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References

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