Influence of Seed Coat Wrinkleness on Seed Quality of Large-seeded Khon Kaen 60-3 Peanut

Abstract

Wrinkled and non-wrinlked seed of the large-seeded Khon Kaen 60-3 peanut from the same lot were different in seed quality. Wrinkled seeds were higher in moisture content, first count germination and germination index but were lower in seed vigor as determined by the conductivity test and seeding dry weight than the non-wrinkled seeds. Both types of seed were not different in standard germination and seed vigor as determined by the modified accelerated aging test. After 4 months storage, seed vigor as determined by seedling dry weight and modified accelerated aging of wrinkled seeds were lower than the non-wrinkled seeds, but seed moisture content, standard germination and germination index were not different. There fore the mature wrinkled peanut seed could be used for planting. However seed quality or deterioration of wrinkled seed was potentially decreased faster than non-wrinkled seed. During the early germination process, wrinkled seeds of Khon Kaen 60-3 peanut imbibed water faster than the non-wrinkled seeds. No differences in field emergence and germination index were found among the wrinkled and non-wrinkled seeds plants in Taphra, Pakchong and Kamphaengsaen soil at the planting depth of 5, 7.5 and 10 centimeters. But seedling dry weight of wrinkled seeds were lower than the non-wrinkled groups. This characteristic indicated the slower early peanut seedling growth and development of the wrinkled seed than the non-wrinkled seed coat peanut.