Rice CR1009 Sub 1(IET 22187) - A new flood tolerant rice variety

Abstract

CR1009 Sub 1 a new version of long duration short bold grain rice variety CR1009 with submergence tolerance was released by Department of Rice, Tamil Nadu Agricultural University, Coimbatore, to overcome submergence during samba season for flood prone areas of Tamil Nadu. CR1009 Sub1 is a product of Marker Assisted Selection of the cross CR 1009 / FR 13 A and it was developed by IRRI in collaboration with NRRI, Cuttack. CR1009 Sub1 rice variety recorded a mean grain yield of 5759 kg/ha with 8.90 per cent increase over CR1009. The variety was tested over three years in station trial (2008-2010), one year in Multi location trial (2010-11), two years in Adaptive research trial (2011-12 and 2012-13), two years in OFT (2010-11, & 2011-12) and one year in AICRIP trial (2010-11). CR1009 Sub1 is moderately resistant to BPH, WBPH, Brown spot and Leaf Blast. CR1009 Sub1 has short bold grain type with good milling percentage (69.8%) and head rice recovery (62.5%), high amylose content (25.0) intermediate gelatinization temperature and soft gel consistency indicating its similarity to CR1009 and also suitable for idly making. This variety was released by TNAU during 2015 and notified during 2017.

Keywords

• CR 1009 Sub1
• long duration rice variety
• short bold grain
• MAS
• QTL
• Flood Tolerance