Cereal Research Communications
Volume/Issue:
Volume 35: Issue 3
Importance of secondary traits in improvement of maize ( Zea mays L.) for enhancing tolerance to excessive soil moisture stress
Authors:
P. Zaidi Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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P. Maniselvan Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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R. Sultana Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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M. Yadav Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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R. Singh Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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S. Singh Indian Agricultural Research Institute Directorate of Maize Research New Delhi 110 012 India

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S. Dass CSS HAU Regional Research Station Uchani, Karnal Haryana India

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G. Srinivasan International Maize & Wheat Improvement Center (CIMMYT) Aptd. Postal 6-641 06600 Mexico

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Pages:
1427–1435
Online Publication Date:
07 Aug 2007
Publication Date:
01 Sep 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1556/crc.35.2007.3.7
Keywords:
maize; secondary traits; waterlogging
Restricted access

Selection on the basis of grain yield per se for improved performance under excessive moisture stress has often been misleading and considered inefficient. We assessed the importance of secondary traits of adaptive value under waterlogging stress. During the 2000–2004 summer-rainy seasons twelve trials were conducted and a total of 436 tropical/subtropical inbred lines (S 4 –S n ) were evaluated under excessive soil moisture stress. Excessive moisture treatment was applied at V 6–7 growth stage by flooding the experimental plots continuously for seven days. Different phenological and physiological parameters were recorded before, during and either immediately or 1–2 weeks after exposure to stress. Excessive moisture conditions significantly affected all the morphological and physiological traits studied. However, there was significant genetic variability for various traits, especially for root porosity and brace root development that were induced under excessive moisture. Across the trials, significant genetic correlations (p<0.01) was obtained between grain yield and different secondary traits, including ears per plant, root porosity, brace root fresh weight, number of nodes with brace roots and anthesis silking interval. Broad-sense heritability decreased under excessive moisture stress conditions for most of the traits; however, it increased significantly for root porosity, nodal root development and ears per plant. Our findings suggest that consideration of these second-ary traits during selection of maize germplasm for excessive moisture tolerance can improve selection efficiency and genetic gains.

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Cover Cereal Research Communications
Cereal Research Communications A Quarterly of the Cereal Research Non-Profit Ltd. Company
Print ISSN:
0133-3720
Online ISSN:
1788-9170

 

 

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Cereal Research Communications
Language English
Size A4
Year of
Foundation		 1973
Volumes
per Year		 1
Issues
per Year		 4
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)

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