Line X Tester Analysis Across Environments in Tomato: Combining Ability, Heterosis and Estimates of Genetic Components in Bacterial Wilt Resistant Genotypes

RATTAN, PUJA, KUMAR, SANJEEV

ISBN 10: 3838336828 / ISBN 13: 9783838336824

Published by LAP Lambert Academic Publishing, 2010

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Bibliographic Details

• Title: Line X Tester Analysis Across Environments in Tomato: Combining Ability, Heterosis and Estimates of Genetic Components in Bacterial Wilt Resistant Genotypes
• Publisher: LAP Lambert Academic Publishing
• Publication Date: 2010
• Language: English
• ISBN 10: 3838336828
• ISBN 13: 9783838336824
• Binding: paperback
• Condition: New
• Book Type: book

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Synopsis

Study was carried out at Palampur and Bajaura in India.7 lines, 4 testers & their 28 hybrids were evaluated in RBD with 3 replications in line x tester mating design. ANOVA revealed significant differences among genotypes and GxE interactions, the line x tester analysis revealed significant differences due to line x location, tester x location & line x tester x location interactions (tested against error mean squares) at both locations and pooled analysis for most of the traits. GCA effects revealed that the lines BT-18 and Rodade and tester Hawaii-7998 and EC-392698 at Palampur;lines BL-333 and CLN-2123 and testers EC- 191536 and EC-392698 at Bajaura were good general combiners for yield and its contributing traits. However, BT-18 and BL-333 among lines and EC-392698 and Hawaii-7998 among testers were good general combiners for maximum traits studied in over all pooled analysis. Based on combing ability, heterosis and mean performance, crosses BT- 18xHawaii-7998, RodadexEC-392698 and BL-333xEC- 191536 in overall pooled analysis had great promise for further exploration. Preponderance of non additive gene action was fond in most of the traits.