Study on Influencing Factors of Seed Dormancy in Peanut( Arachis hypogaea L. )

Peanut is an important oil and economic crop in China. Seed dormancy of peanut( Arachis hypogaea L.) is an important agronomic trait which can affect quality,yield and seed quality in agricultural production. In this study,seeds from 16 cultivars / lines were applied in seed dormancy test. Results showed that the germination rate of dry seeds from the 16 cultivars / lines ranged from 0 to 100%. The germination frequencies of dry seeds from Huayu25,Huayu28 and Xuhua13 were 100%,while the germination frequencies of fresh seeds and dry seeds from the strong dormancy variety Huayu52 were 0. Seed dormancy was closely related to maturity and seed moisture content. Endogenous hormone analysis showed that high ABA content,low GA content and low GA / ABA ratio played a positive role to maintain dormancy. In contrast to dormant seed,endogenous GA content during dormant released seed by ethephon rising rapidly,the content of ABA decreased slightly,and the ratio of GA / ABA increased rapidly. The study provided a reference for influencing factors of seed dormancy and dormancy release,especial endogenous hormone.