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INHERITANCE OF TRAITS RELATED TO SEEDLING VIGOR AND GRAIN YIELD IN RICE (ORYZA SATIVA L.)

MUHAMMAD AKRAM, SAIF ULLAH AJMAL†*AND MUHAMMAD MUNIR*

Abstract: Nature of gene action and inheritance of traits related to seedling vigor and grain yield was determined in F₁ generation of a 7 parent diallel cross. Genetic component analysis revealed that rate of germination index and seedling shoot length were influenced by both additive and non-additive gene action, however, the additive component was found to be more pronounced in the inheritance of these two traits.
Wr-Vr graphic analysis indicated that rate of germination index was under the control of complete dominance gene effects. Over dominance appeared to be more important for seedling root length, seedling dry weight and 100 seed weight while partial dominance was found controlling seedling shoot length, number of tillers per plant, panicle length and grain yield per plant.
 

National Agricultural Research Centre Islamabad, Pakistan.
* University of Arid Agriculture Rawalpindi, Pakistan.
*Corresponding author E-mail: gondaldr@yahoo.com, Tel: 051-9062258.