Vol. 10, Issue 8 (2021)

Author(s):
RA Jadhav, SP Mehtre, DK Patil and VK Gite

Abstract:
Mung bean is an important legume crop. It is protein rich food with 25 percent protein content. But it is very much susceptible to in-situ germination. The pre-harvest germination of the mung bean causes considerable losses due to sprouting of seeds in pods when the crop is on field. Due to late onset of monsoon followed by long dry spell, sowing is not done in speculated period, hence the yield is drastically reduced. Due to late sowing, the maturity is also coincide with heavy rains in the month of September resulting into in-situ germination. Therefore, it is very essential to develop the genotypes having in-situ germination dormancy. In this study, an attempt was made to cross wild Vigna radiata var. sublobata (Accession No. BWM-29) with the cultivated mung bean i.e. Vigna radiata (BM-4). But F1 showed dormancy to this. The single plant selections having seed dormancy with long pods were made. The material for present study included 70 mung bean breeding lines. Among the 70 breeding lines, 12 were derivatives of three way crosses, 12 were derivatives of four way crosses, 41 were derivatives of single crosses derived from inter-specific cross and five were checks which are popular cultivated varieties by farmers. Observations on in-situ germination were recorded at the interval of 5 days, 10 days, 15 days, 25 days and 35 days both in field and laboratory conditions. Based on data, total number of 14 derivatives found most dormant. The resistant breeding lines for in-situ germination found in the study are SPS-10, SPS-42-1-10, SPS-40-1-13, SPS-42-1-8, SPS-42-11-1, SPS-42-1-11-2, SPS-6-1-11, SPS-6-1-25, SPS-6-11-7, SPS-6-23-6, SPS-6-39-19, SPS-6-52-6, SPS-6-52-15 and SPS-6-53-13.