Performance of Gene Pyramided Rice Lines for Blast and Sheath Blight Resistance

Author: Velprabakaran Senthilvel, Vanniarajan Chockalingam, Renuka Raman, Shanmugasundaram Rangasamy, Thiruvudainambi Sundararajan and Ramalingam Jegadeesan*

Journal Name:

Download PDF

Abstract

Rice is the major cereal among all other food crops in the world. It was majorly affected by various biotic stresses. Blast and sheath blight imposes 20-25% of yield penalty. The elite and sustainable method for valuable management of disease resistance development is to develop resistant cultivars. The phenotypic and genotypic evaluations were used in the marker assisted crop enhancement. The present study was carried out to inculcate blast (Pi54) and sheath blight resistant QTLs (qSBR11-1, qSBR11-2 and qSBR7-1) resistant lines into high yielding Co51 cultivar from donor parent Tetep. The homozygous lines (F5) showed significant yield potential and resistant attributes. Presence of resistance genes were confirmed through linked DNA markers (Pi54 MAS, RM209, RM224 and RM336) and the desirable plants were assessed for the morphological evaluation. Six selected improved lines exhibited good agronomic performance and good grain quality. The better resistant lines will be forwarded for fu

Keywords

Marker assisted selection (MAS), Rice, blast, Sheath blight resistance.