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Genotypic and Environmental Variation in Nodal Root Growth of Post-rainy Season (Rabi) Sorghum

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Relation http://oar.icrisat.org/7828/
http://dx.doi.org/10.1017/S001447970001992X
 
Title Genotypic and Environmental Variation in Nodal Root Growth of Post-rainy Season (Rabi) Sorghum
 
Creator Soman, P
Seetharama, N
 
Subject Sorghum
Genetics and Genomics
 
Description Rapid initiation and growth of nodal roots (NR) are critical for the establishment of post-rainy season (rabi) sorghums grown in drying soil. The growth of NR was studied in sorghum in the field when sown at different depths in order to vary the crown depth, when different levels of irrigation water were applied to create different moisture contents in the topsoil, and in a number of cultivars to assess genotypic variability. Variation in sowing depth did not result in differences in NR growth, partly because of the capacity of sorghum to vary the mesocotyl length, which brought the crown to approximately the same depth. Different soil moisture levels in the field affected the elongation rate of NR, but not their initiation. Genotypic variation existed in the thermal time required for NR initiation and rate of elongation. The variation in NR growth was independent of the variation in shoot growth. The genotypic variability in NR growth offers an opportunity for combining root-related traits with useful agronomic characters
 
Publisher Cambridge University Press
 
Date 1992
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/7828/1/Expl%20Agric._28_331-341_1992.pdf
Soman, P and Seetharama, N (1992) Genotypic and Environmental Variation in Nodal Root Growth of Post-rainy Season (Rabi) Sorghum. Experimental Agriculture, 28 (3). pp. 331-341. ISSN 0014-4797