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Inheritance of Fresh Seed Dormancy in Peanut

Groundnut Improvement Project, ICRISACT Center, Patancheru, 502324, Andhra Pradesh, India

^* Corresponding author (H.UPADHYAYA{at}CGNET.COM).

Incorporation of seed dormancy limited duration in Spanish peanut (Arachis hypogae L. ) genotypes is required to avoid loss in pod yield and seed quality because of in situ germination in unpredictable rainfall environments. Knowledge of inheritance of fresh seed dormancy is important to peanut breeder for developing fresh seed dormant early-maturing Spanish cultivars. This study was conducted to determine the inheritance of fresh seed dormancy using three Spanish peanut genotypes. Two dormant (ICGV 86158 and ICGV 87378) and one non-dormant (JL 24) genotypes were crossed in all possible combinations, including reciprocals. The fresh seeds from mature pods from parents F₁, F₂, F₃, and backcross populations were evaluated for their dormancy by germination test in the laboratory at 35 ± 2°C in the dark. Results showed that the fresh seed dormancy in these genotypes is controlled by a dominant allele of a single gene. The two dormant parents, ICGV 86158 and ICGV 87378, possess the same allele for fresh seed dormancy.

Received for publication January 14, 1998.