Abstract
Six hexaploid tritreale Rtifrina,, selected on the basis of morphological evaluation, were cr01,...,ed in a. diallel fashion to test their combining ability and nature of .gene actiori involved by using Griffins technique. Significant genotypic differences were observed among these etreins for all the characters, Both &daftly. (' and non-additive gene. action was obeery d. Complete -dominance was expressed for spike length. Consid.eling all the characters toga. then, strain 6TA 204 Bronco waa good gentrel .00mbitrer for plant height., number cif spikelete Fier "pike and number of grains per spike, whereas Delfin "S" for fertility percentege and yield per plant, Per se performance was observed to be associated with 0.CA and SCA Efiectg, Importance of ibis" rt sults for the improve. merit of triticale is discussed.
INTRODUCTION
Bresdins efforts have resulted in various varieties of triticele having improved fertility and grain charactera (Sko.vmand ft 1084). Varieties/ advanced lines with different morphological and ecorcmic chetra(tcrietice are now available as breeding 'stock (Gupta end Priyadarshar, 19S2). For further progress knowledge' of freeding behaviour, particularly of combining ahility and type of gece action for the varioue necesPary. Chowdhury and Singh (1978h and Shakoor ft al. (1970) repottea.both additive arid ocwatlditive gene action for yield and yield coraronerte in their advan«d lines, but information is rather limited on the lines in hand. 'Ike prompt study is an attempt to predict the performance of these lines iEr bybrid combinations through the Wand cross and to evalute the tape of gene action involved in yield and its components in these hexaploid triticalee.
ImM■P ..■1•10,
* Mutation Breeding Division, Nuclear Institute for Ast-kialtuie and Biology. Faisalabad. **Plant Bre eding at d Genetics Devitt= tut, Unive rsity of Agritulturc,Faiealabed.
