FAO/IAEA International Symposium on Plant Mutation Breeding and Biotechnology

ISOLATION OF GAMMA RAY INDUCED URD BEAN (Vigna mungo (L.) Hepper) MUTANTS WITH INCREASED BATTER VOLUME

Not scheduled

20m

IAEA, Vienna

Oral Mutation breeding for adaptation to climate change in seed propagated crops

Speaker

Dr VANNIARAJAN Chockalingam (TAMIL NADU AGRICULTURAL UNIVERSITY)

Description

Urd bean is an important legume crop in India useful for the preparation of domestic nutritious breakfast meals called: Idli and Dosa. Idli is a fermented steamed bread-like cake and an important source of protein and energy in the diet of many South Indians. Idli is easily digested and hence preferred by all: from infants to elderly people. The specialty of urd bean in idly preparation is owing to the mucilaginous material present and does not exist in other edible legumes. The mucilaginous material is a complex carbohydrate containing galactose and arabinose. MDU 1 urd bean variety was released from Tamil Nadu Agricultural University, Madurai, India during 2014. It gives higher yield and possesses a high arabinose content of 7.5%. The volume of batter was increased in the variety MDU 1 over other existing varieties. This is beneficial to the farmers, traders and consumers. This variety, MDU 1, has a maturity duration of 70-75 days, has bushy nature, and is susceptible to yellow mosaic virus. To develop a determinate type, MDU 1 urd bean seeds were irradiated with gamma rays using doses ranging from 100 Gy to 500 Gy with an interval of 100 Gy. The determinate types were selected in the M2 generation and advanced to further generations. After attaining homozyosity in the advanced generations, the mutants were checked for their biochemical characters. The mutants ACM 16-11, ACM 16-15, and ACM 16-18 were found to have an arabinose content of 8.28%, 8.98% and 8.14% respectively. All the mutants recorded more than 10% increase in batter volume over the variety MDU 1. The albumin (%) and globulin (%) contents were also increased remarkably in the mutants. We suggest subjecting these mutants to multi-location trials and proposed for registration.