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Analysis of genotypic variation for normalized difference vegetation index and its relationship with grain yield in winter wheat under terminal heat stress
Author(s) -
Hazratkulova Shahnoza,
Sharma Ram C.,
Alikulov Safar,
Islomov Sarvar,
Yuldashev Tulkin,
Ziyaev Zafar,
Khalikulov Zakir,
Ziyadullaev Zokhid,
Turok Jozef
Publication year - 2012
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12003
Subject(s) - normalized difference vegetation index , biology , agronomy , genotype , winter wheat , heat stress , yield (engineering) , poaceae , grain yield , vegetation (pathology) , zoology , leaf area index , medicine , biochemistry , materials science , metallurgy , gene , pathology
Normalized difference vegetation index ( NDVI ), which is a measure of leaf greenness (chlorophyll content), is considered to be correlated with crop productivity. This study was conducted to examine genotypic variations for NDVI at different growth stages and its relationship to yield in winter wheat under terminal heat stress. Thirty winter wheat genotypes were evaluated at two locations in 2009–2010 and 2010–2011 in U zbekistan. The NDVI was recorded at booting, heading, milk and dough stages. The wheat genotypes differed significantly for NDVI at each stage. Grain yield ranged from 3.9 to 6.1 t/ha. Wheat genotypes differed in per cent decline in NDVI from booting to dough stage. However, several high‐yielding genotypes maintained higher NDVI than low‐yielding genotypes when heat stress was evident. The findings suggest change in NDVI during heat stress could be a measure of tolerance. The positive correlation of NDVI with grain yield suggests that it could be used as an indirect selection criterion for identifying physiologically superior, high‐yielding wheat lines under terminal heat stress.