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2007•Crop improvementRequires access

Combining Ability and Heterosis for Grain Yield and its Component Characters in Rice (Oryza Sativa L.)

R. Narasimman, S. Thirugnana Kumar, R. Eswarn, C. Praveen Sampath Kumar, A. Anandan

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Abstract

A full diallel analysis involving nine rice genotypes was used to study the combining ability and heterosis for grain yield and its component characters. The study revealed that ADT 44 was good general combiner for all the six traits studied. The parent CR1009 was also observed to be good combiner for all the traits except harvest index. The cross ADT 44 x CR 1009 exhibited highly significant positive sea effects coupled with highly significant positive heterobeltiosis and standard heterosis for number of filled grains per panicle, biomass per plant and grain yield per plant.

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What this paper is about

A full diallel analysis involving nine rice genotypes was used to study the combining ability and heterosis for grain yield and its component characters. The study revealed that ADT 44 was good general combiner for all the six traits studied. The parent CR1009 was also observed to be good combiner for all the traits except harvest index. The cross ADT 44 x CR 1009 exhibited highly significant positive sea effects coupled with highly significant positive heterobeltiosis and standard heterosis for number of filled grains per panicle, biomass per plant and grain yield per plant.

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Available abstract

A full diallel analysis involving nine rice genotypes was used to study the combining ability and heterosis for grain yield and its component characters. The study revealed that ADT 44 was good general combiner for all the six traits studied. The parent CR1009 was also observed to be good combiner for all the traits except harvest index. The cross ADT 44 x CR 1009 exhibited highly significant positive sea effects coupled with highly significant positive heterobeltiosis and standard heterosis for number of filled grains per panicle, biomass per plant and grain yield per plant.

Key concepts: Heterosis, Diallel cross, Oryza sativa, Panicle, Grain yield, Biology, Forensic science, Yield (engineering)

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