Evaluasi Plasma Nutfah Kacang Tunggak (Vigna unguiculata L.) di Lahan Masam

Abstract

Plant genetic resources are as a source of genetic variability and can be used to develop new varieties tolerant to abiotic and biotic stress. Evaluation of cowpea germplasm to abiotic stress, such as acidic soil has to be done to obtain information of their tolerance. Cowpea germplasm collection held in ICABIOGRAD was tested under acidic soil condition in Jasinga, West Java and Bogor as control during March-June 2007. The criteria of tolerance to acidic soil was determined when the grain yield of cowpea under acidic soil more than 80% compare to those yield under non acidic soil, while susceptible to acidic soil when lower than 25%. Result of experiment showed that accession of LO-3-38, Ces-41-6, TVX-4661-01D-A, IT82-889-A, TV.3381-0-2j-B and Kacang Tolo Loreng were tolerant to acidic soil, while Kacang Dadap dan Kacang Tolo were susceptible. These accessions could be used as parent materials for genetic study related to acidic soil stress.