DRR Dhan 51

Background:

Rice production is always constrained by several biotic stresses, among which blast disease impose both several yield and quality losses. Swarna was released by Andhra Pradesh in 1982 developed by Maruteru (ANGRAU) research station and many other states of India cultivating in large portion. Swarna matures in 155 days with short plant height, profuse tillering, with short bold grain, requires 25% less nitro gen. High level of susceptibility of swarna to blast disease caused by the fungus Magnoporthe oryzae, is a serious constraint to rice production, which results in major yield loss. Hence, in the pre sent study, an attempt was made to develop high yielding resistant swarna through MABB approach with dominant blast resistance gene Pi2.

Technology Details:

DRRDHAN-51 is a tall plant type, erect, high tillering and non-lodging plant habit. It possesses major blast resistance gene Pi-2 and it has 95.6% genome similarity with swarna. DRRDHAN-51 exhibited high level of resistance to blast across the country in multi-location trials of All India Coordinated Rice Improvement Project (AICRIP) and has seed to seed maturity 130-135 days. DRRDHAN-51 showed superiority yield on recurrent parent swarna in states Uttar Pradesh, Gujarat, Telangana and Chhattisgarh also it showed on par yield with recurrent parent swarna. Yield in irrigated conditions 45-50 q/acre. DRRDHAN-51 also possesses excellent grain and cooking quality features on par with swarna in terms of Hulling percentage (79.5), Head rice recovery (60.1), Kerel length (5.1), Kernel breadth (2.16), L/B ratio (2.44), Alkali spreading value (4.0) and Amylose content (26.7).

PPV&FRA Registration No: REG/2022/0015