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Trends in Biosciences
Year : 2010, Volume : 3, Issue : 2
First page : ( 169) Last page : ( 173)
Print ISSN : 0974-8431. Online ISSN : 0976-2485.

Combining Ability for Maturity, Morphological and Yield Related Traits in Maize (Zea mays L.)

Asif, Iqbal M., Nehvi F.A., Qadri H., Dar S.A.

Division of Plant Breeding & Genetics, Sher-e-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar 191121  (J&K)

Online published on 14 March, 2012.

Received:  15  September,  2010; Accepted:  21  October,  2010.

Abstract

Combining ability analysis for yield and its contributing traits was carried out in maize (Zea mays L.) by gorwing 45 F1’s generated by crossing fifteen lines with 3-well adapted testers. The material was generated and evaluated at Karewa Damuder Maize Research Station Budgam during 2004–05. The analysis of variance revealed highly significant differences among lines, testers and line x testers for all traits studied. The estimation of genetic component of variance indicated higher proportion of dominance variance for all traits studied except for grain yield ha−1 and days taken to 50% husk browning. Inbred lines KDM 334 (yield), KDM 335 (anthesis and silking) and KDM 349 (husk browning, plant height and ear height) recorded highest gca effects towards desired direction, whereas, KDM 331 × KDM 346 and KDM 336 × KDM 346 were the best specific cross combinations for early flowering and maturity traits. Highest specific combining ability for grain yield ha-1 was recorded in KDM 349 × KDM 346.

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Keywords

Zea mays, combining ability, yield.

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