Vol. 17 No. 3
Physiological and biochemical profiling of different mulberry genotypes developed for Eastern and North Eastern India
Author(s): Y. HARIJAN, K.U. DEEPIKA, B. PADMINI, K. SURESH, L. MALOY AND V. SIVAPRASAD
Abstract: Physiological and biochemical profiling of mulberry varieties in Eastern and North Eastern (E & NE)India is important for identification of markers associated with leaf quality and stress tolerance while undertaking future breeding programs. Thirteen mulberry genotypes (two local varieties, eight released varieties and three advance breeding lines) were assessed on physiological and biochemical basis under irrigated conditions of West Bengal. Lipid peroxidation occurs due to production of reactive oxygen species (ROS) during biotic and abiotic stresses. Lower thiobarbituric acid reacting substances (TBARS) revealed lower lipid peroxidation activity indicating higher level of stress tolerance of variety.The check variety S-1 recorded lowest levels of TBARS followed by C-2028, Tr-10 and Kajli. Secondary metabolites not only enhances the mulberry leaf quality for silkworm (Bombyx mori) consumption, but also act as antioxidants for remediating the biotic and abiotic stresses faced by the crop plant; thereby helping to curb the ROS production leading to better leaf yield. Higher secondary metabolites (TPC, TFC and TTC) content were recorded in C-2028 and C-2060 indicating higher tolerance towards various stresses. Leaf quality parameters such as TSS, TSP, CCI and NRA of the test varieties were at par with S-1;while C-2060 recorded 12% higher yield over C-2038, the ruling mulberry variety of the zone. Overall, Multiple Trait Evaluation Index (MEI) reveals that genotypes C-2060, C-2028 and C-1730 were physiologically and biochemically superior exhibiting better traits for tolerance to biotic and abiotic stresses and might be more useful for developing climate resilient mulberry genotypes.
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