摘要
对品种适应性和产量稳性的概念和含义、参数估计及其存在问题和应用作了综述与讨论。以品种平均产量为参照数所估计出的变异系数或标准差比数可看作稳定性参数,以环境指数为参照数所估计出的回归系数可看作适应性参数。如何获得环境估计值问题,还需进一步研究。建议以标准差比数a_i度量产量稳定性,以回归系数b度量品种适应性,以相关系数γ度量b的可靠性。
In this paper the following problems about adaptability and yield stability of cultivars are discussed: 1. Implication and concept of cultivar adaptability and yield stability. 2. Parameter estimation of cultivar adaptability and yield stability. 3. Questions and applications in their parameter estimation. According to the reference value of mean yield of cultivars or environmental index, the parametcrs may be divided into two categories, cultivar adaptability and yield stability. The question of how to analyse environmental data has not yet been properly addressed and more research is needed with an attempt to find a solution to this statistical problem. A marginal parameter estimation is that a regression coefficient b may be used to measure the cultivar adaptability, a coefficient of correlation γ to measure the reliability. The standard deviation ratio, a_i=si/s may be used to measure the yield stability.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
1989年第3期17-23,共7页
Journal of Nanjing Agricultural University
关键词
品种适应性
产量稳定性
标准差比数
回归系数
Adaptability
Yield stability
Standard deviation ratio
Regression analysis
