Pak. J. Bot., 39(5): 1523-1531, 2007. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
GENOTYPIC DIFFERENCES FOR ALLOMETRIC RELATIONSHIPS BETWEEN ROOT AND SHOOT CHARACTERISTICS IN CHICKPEA (CICER ARIETINUM L.) A .GANJEALI1 AND M. KAFI2
Abstract:
The study was conducted at the Research Greenhouse of Ferdowsi
University of Mashhad. Twenty genotypes of chickpea were grown in pots
(10´100
cm). Root traits including, total root length (TRL), number of lateral
roots (NLR), root area (RA) and ratios of root dry weight (RDW) to root
volume (RV) and leaf area (LA) to (RA) only at the seedling stage and
root traits such as tap root length (TL), RVand RDW and shoot traits
including, height of plant (H), leaf area (LA), leaf dry weight (LDW),
stem dry weight (SDW) and root/shoot ratio at the seedling to seed
filling were determined. Significant differenence were found in TI, TRL,
NLR, RA, RDW at the seedling stage.
The triats RV, NLR, RA, RDW and
RA showed significant and positive correlation with TRL at the seedling
stage. No correlation was found between root traits at the seedling
stage with the same traits at the flowering, podding and seed filling
stages. In the seedling stage the highest linear regression correlation
between TRL and RA (r2=0.91), between TRL and RV (r2=0.81),
between RV and RA (r2=0.82) and between TRL and NLR
(r2=0.84) were found. The correlation coeffiicent of RV
versus H was 0.89, 0.81 and 0.94 at the flowering, podding and seed
filling stages, respectively. There was a significant correlation
between RDW and RV at the flowering (r2=0.55) and
podding stages(r2=0.56). Since RV, RA and RDW are easy
to measure and has the highest correlation with the TRL at the seedling
stage, therefore we will be able to use from equations produced for TRL
estimation in this stage. These parameters are the major criteria for
selection of drought resistance.
1Research Center for
Plant Science, Ferdowsi University of Mashhad, P.O. Box:
91775-1491, Iran. E-mail:
ganjeali@um.ac.ir Fax: 0511-8787670. |
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