Background:
Soybean rust, a disease of serious concern causing significant yield losses ranging from 30-100 per cent in Southern parts of India and has become a major constraint for expanding area under soybean in South India. Most of the released varieties viz., JS 335, JS 93-05 and DSb 1 were highly susceptible to rust. Hence, there was an urgent need to develop rust resistant variety.:
Technology Details:
DSb 34 (DSb 23 x JS 95-60) is a rust resistant variety with high yield potentiality developed by UAS, Dharwad and accepted for release / notification by CVRC for Southern zone of India during November 2020. In addition to rust resistance, it gives higher yield (10-15%) than the popular variety JS 335. It matures in 85-90 days on par with JS 335 and suitable for intercropping systems. Since, it requires no fungicidal spray, it reduces the cost of cultivation in addition to higher net returns through higher yield. By growing continuously, it prevents further spread of rust. It is also best suited for organic cultivation. :
Name of crop/ variety Soybean - DSb 34 Parentage DSb 23 x JS 95-60 Year of release (CSC on CSN & RVAC) 2020 Gazette Notification Details Accepted for notification by CVRC during November 2020 Yield (t/ha) 30-32 q/ha Season Rainfed and irrigated conditions Maturity Group 85-90 days Reaction to major diseases and insects Under field and controlled conditions, it is highly resistant to soybean rust caused by Phakopsora pachyrhizi Syd. and moderately resistant to stem fly and pod borer Other remarks Oil - 18.6% and Protein - 38.2%.