Evaluation of Rice Hybrids for Yield and Morphological Traits

In the present investigation, information regarding magnitude of heterosis was gathered for grain yield per hill and seven other yield attributing traits using line x tester analysis involving four females (CMS lines), fifteen restorers and their resultant sixty hybrids evaluated at three locations during kharif-2003. Significant differences were noticed among genotypes, parents and hybrids for all the characters studied. Significance of parents vs. hybrids comparison showed existence of overall heterosis. Significance of parents x locations and hybrids x locations interactions suggested that parents and hybrids infracted differently with different environments. A considerable degree of heterosis in desired direction was manifested by many hybrids over two standard checks viz., Jaya and Pro-agro-6201 in respect of grain yield per hill and various component traits. Significant positive heterotic effects and high per se performance with regards to grain yield per hill were recorded by the hybrids IR-58025A x BR 827-35-3-1, IR-58025A x RTN-3 and IR-58025A x IR-46. Seven hybrids exhibited significant positive heterosis over standard check hybrid Pro-ar $ brain yield per hill.