Genotypic variation for normalized difference vegetation index and its relationship with grain yield in wheat under terminal heat stress

Published on Jun 07, 2018 12:36 PM

The present study was conducted to determine genotypic
variations for normalized difference vegetation index (NDVI)
at eight different growth stages and its relationship to yield
in wheat under terminal heat stress. Thirty six wheat
genotypes were evaluated under staggered sowing, timely
sowing (15th November, normal), late sowing (15th December,
heat stress) and very late sowing (6th January, heat stress)
during 2012-13 and 2013-14. The NDVI was recorded at
different growth stages viz., flag leaf, booting, heading,
anthesis, milk dough, and maturity. The wheat genotypes
differed significantly for NDVI at each stage and at each
sowing condition. Rate of reduction in NDVI from heading
to dough stage was low for genotypes namely, KAUZ/AA//
KAUZ, SOKOLL, HW2004, HD2864, HD2967, FLW18, CHIRYA
7 and HD2932. Overall, under heat stress leaf senescence
was 7 to 14 per cent faster than normal condition. Genotypes
which maintained high NDVI were potential stress tolerant
with higher stress tolerance index. Since data recording of
NDVI is relatively easier than any other physiological traits,
it could serve as indirect selection criteria to measure stress
tolerance facilitating selection of the lines from large
populations.

Keywords: NDVI, wheat, Zadok’s scale, genotypic variation, heat stress

Info

Year: 2015
Volume: 75
Issue: 2
Article DOI: 10.5958/0975-6906.2015.00027.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

K. T. Ramya, N. Jain, P. Ramya, P. K. Singh,G. P. info_circle
A. Arora info_circle
Shilpi Kumari,K. V. Prabhu info_circle

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