Vol. 5 No. 2
Selection criteria for high yield in early segregating generation of rice (Oryza sativa L.) crosses.
Author(s): B. K. SENAPATI, S PAL*, S. ROY*, D. K. DE* AND S. PAL
Abstract: India produces some of the best quality rice of the world. Long grained export quality Basmati rice and a host of locally adapted small and medium grained scented rice varieties are some of them, known for their excellent cooking and eating qualities. Due to tall stature they suffer from lodging as a result these elite varieties are poor yielder. In order to blend the quality characteristics with the high yield eight varieties viz. IR 30, IR 50, IR 62, IET 5656, IET 8002, Kunti, Langulmota and Sabita with high yield background were crossed with six quality rice varieties viz. Basmati 385, Kataribhog, Kalonunia, Radhunipagal, Dudheswar and Sambamahsuri,. From the hybrids generated through Line x tester model 25 were selected to proceed to F2 generation. They were evaluated during kharif season 2006 in randomized block design with two replications for eleven biometrical characters to study the correlation coefficient and cause and effect relationship. Grain yield plant-1 showed significant correlation with panicle number plant-1, panicle weight and grain number panicle-1 in positive direction while it had negative correlation with plant height. Panicle number plant-1 imparted the highest positive direct effect on grain yield plant-1 followed by grain number panicle-1, 1000 grain weight and panicle length in this regard. Thus, correlation studies and path analysis reveal the fact that panicle number plant-1 and grain number panicle-1 should be considered as the most important characters during selection for yield improvement in segregating generations of rice..
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