Screening at an early growth stage in maize (Zea mays L.) for detection of drought tolerant genotypes
Paper Details
Screening at an early growth stage in maize (Zea mays L.) for detection of drought tolerant genotypes
Abstract
Maize is the largest produced grain on earth and plays significant role in food security. The study was aimed to explore the genetic variation and the degree to which seedling characters of maize are associated with each other under normal and water deficit environment. Fifty maize genotypes were sown in sand culture in Completely Randomized Design under factorial arrangement with three repeats under different water regimes. Pooled analysis of variance (two way) showed that all sources of variations were statistically significant except interaction of inbred lines × treatments for leaf relative water content (LRWC). Inbred line YP-12 exhibited maximum values for LRWC (68 %), Root length (34.23 cm), FRTWT (12.36 g), DRTWT (5.68 g) and root to shoot ratio (3.39) under water deficit regime. Maximum genetic advance (9.81) and heritability (93%) was recorded for dry root weight (DRTWT) under water deficit environment. Strong significant positive association was detected between fresh shoot weight (FRTWT), Leaf relative water content (LRWC) and fresh shoot weight (FSTWT) under water deficit environment. The YP-12 genotype considered as tolerant inbred line/genotype and could be used in maize developing program to tailor drought tolerant maize hybrids.
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