Double Fertilization and Duration of Phases in Peanut (Arachis hgpogaea L.) Isolation and Identification of Specific Expressed Proteins from Peanut (Arachis hypogaea L.) Development /Abortion Embryo Mediated by Calcium Cloning and Functional Analysis of Peanut AhDGAT2a Promoter? Allelic Expression Variation of ahFAD2A and its Relationship with Oleic Acid Accumulation in Peanut