Range of Application of Inverse Variance Weighting for Using Historical Information in Stepwise Yield Screening of Plant Varieties

スポンサーリンク

概要

• 論文の詳細を見る

• Using yield data collected in the preceding steps of selection (historical information) for the evaluation of the yielding ability of test varieties is essential to increase the efficiency of stepwise yield screening of plant varieties. Selection in each step should be performed based on the average score over the preceding and current steps. Three methods of weighting can be used to calculate the average score, i.e., inverse variance (IV), field area (FA) and equal (EQ) weighting. In IV, yield data collected in the preceding and current steps are weighted by the inverse of the error variance of the corresponding steps, while those in FA are weighted by the field area (or plot numbers) allocated per variety. A simple average score is used in EQ. Of these three methods, although IV is the best theoretically, it has not been recommended previously nor is commonly used in actual screening trials because two necessary statistics, i.e., variances due to the measurement error (V) and variety × year interaction (I), may not be estimated correctly. Our studies demonstrated that the superiority of IV to the other methods persists under possible degrees of inaccuracy in the estimates of V and L Calculation of the inverse-variance-weighted average does not require significant extra resources or expensive facilities. We therefore suggest that method IV be used with the necessary statistics V and I being estimated from the yield data obtained in the current and earlier steps. Stepwise screening thus performed is superior to non-stepwise screening where the yield of all varieties is measured in the same years and evaluated based on the average over the years.

• 日本育種学会の論文

著者

• Yonezawa Katsuei

  Department of Biotechnology, Kyoto Sangyo University

• Ishii Takuro

  Research Team Of Plant Resources National Institute Of Agrobiological Sciences:(present Address) Pla

• Ishii Takuro

  Research Team Of Plant Resources National Institute Of Agrobiological Sciences

• Yonezawa Katsuei

  Department Of Biotechnology Kyoto Sangyo University

関連論文

• Optimization of the Number of Cycles and Intensity of Selection, and Population Size in Mass Selection : Selection for Single Traits in Outcrossing Plant Populations
• Cost Efficiency of Spatial Error Control in Single Plant Selection
• Marker-based Selection as a Tool for Enhancing the Efficiency of Two Conventional Breeding Methods of Self-fertilizing Crop Plants, the Generation-accelerated Bulk Breeding and Doubled Haploid Breeding
• Range of Application of Inverse Variance Weighting for Using Historical Information in Stepwise Yield Screening of Plant Varieties
• Optimizing the Procedure of Multi-stage Yield Selection for Selecting the Best from a Population of Candidate Entries
• Comparison of Three Different Patterns of Multi-step Yield Screening for a Finite Population of Test Varieties with a Continuous Yield Distribution
• Genetic Correlations among Life History Characters of Adult Females in the Azuki Bean Weevil, Callosobruchus chinensis (L.) (Coleoptera : Bruchidae)

スポンサーリンク