Abstract:

To investigate accumulation characteristics of seed oil in different oil-used peanut varieties and screen a suitable growth equation to describe the seed oil accumulation, six high oil varieties were used and tested by the Richards, Logistic and Gompertz equations. The results showed that the Richards equation was more suitable for simulating oil accumulation process than the other growth equations in peanut. The Richards could improve fitting effect among the three models. Via comparing the accumulation characteristics of seed oil content in different oil-used peanut cultivars, the accumulation of seed oil in peanut could be divided into three stages, which were initial accumulation stage, fast accumulation stage and steady accumulation stage. There were two ways for oil-used peanut cultivars to increase oil content: increasing the rate of seed oil accumulation and extending the time of seed oil accumulation process. From the results of parameters of growth equation, the important strategies in increasing the seed oil content are as follows: (1) Enhancing the maximum rate of oil accumulation; (2) Increasing the oil accumulation at the initial accumulation stage; (3) Increasing the proportion of oil accumulation at fast accumulation stage.

Key words:

Peanut, Variety, Oil accumulation, Richards equation, Simulation