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Pakistan Journal of Biological Sciences
Year: 2002  |  Volume: 5  |  Issue: 3  |  Page No.: 275 - 277

Genotype X Seedling Age Interaction in Rice (Oryza sativa L.)

Umakanta Sarker and Nilufa Ferdous    

Abstract: Genotype x environment interaction for plant height (cm), days to maturity and grain yield (t/ha) in HYV boro rice were studied by growing six genotypes over three different environments (seedling age of 45, 60 and 90 days old). Highly significant genotypes and G x E interaction were observed for all the traits. Highly significant environments were observed for days to maturity and grain yield. Both non-linear component (pooled deviation) and linear components (seedling age) were found highly significant for grain yield and days to maturity but non-significant for plant height and grains protein content (%). BRRI dhan29 and BRRI dhan28 were found to be stable for yield and its components over all seedling age. On the other hand, except BR3, all the varieties showed stability for grain protein content (%) over environments. BRRI dhan29 was observed to be the top yielding crop followed by BRRI dhan28. BR26 and BR24 were found to be suitable for favourable and poor environments, respectively. Sixty days old seedlings might be transplanted followed by 45 days old seedlings for higher grain yield for above varieties.

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