Molecular Characterization and Phenotypic Validation of Rice Genotypes for Nutrient Use Efficiency

Author: M. Girija Rani *, Sirisha A., P.V. Ramana Rao, N. Chamundeswari, B.N.V.S.R Ravikumar and P.V. Satyanarayana

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Abstract

Enhancement of rice productivity with low inputs not only reduces cost of cultivation but also improves soil and human health. Nitrogen and phosphorous are important macro nutrients of chemical fertilizers. Breeding of nutrient use efficient genotypes is complex influenced by soil and environmental parameters .Use of molecular markers is one of the best strategies for breeding programmes and selection of high yielding nutrient use efficient genotypes. Present study aimed to screen 350 rice genotypes using Nitrogen use efficiency (NUE) and Phosphorous uptake (Pup1) QTL linked markers. Allelic variation in expression of positive alleles for both Nitrogen and phosphorous use efficiency was observed. Only 13.14% of genotypes (Swarna, MTU 1061, Swarnasub1, Non-abokara, MTU 1229, MTU 1190, MTU 1226) were identified as nutrient use efficient for both Nitrogen and Phosphorous after molecular characterization and phenotypic validation. The future research has to be focused on breeding nutrien

Keywords

Rice, Molecular characterization, NUE, PUE, phenotypic validation

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