Fig 1.
Weekly average of weather conditions during the wheat growth period in 2010–11 and 2011–12.
Rainfall for the given period is represented by vertical bars.* indicates average of 8 days in the period from 28th February to 6th March in the year 2011–12.
Table 1.
Allele variation and PIC values for microsatellite loci (SSR) used for characterizing wheat genotypes.
Table 2.
Genetic diversity at the genome level of the 31 wheat genotypes revealed by 30 SSR markers.
Table 3.
Genetic diversity in 7 homoeologous groups of the 31 wheat genotypes as revealed by 30 SSR markers.
Fig 2.
Categorization of 31 wheat genotypes revealed by 30 SSR markers.
(A) UPGMA tree constructed using Jaccard’s similarity coefficient; (B) Three subgroups formed from STRUCTURE analysis, Model based population structure plot for each variety with K = 3. Color codes are as follows: Population I red, Population II green, population III blue; (C) Principal coordinates analysis The genotypes are grouped as DT = drought tolerant genotypes, Intermediate Responsive = moderate tolerant and sensitive genotypes and DS = drought sensitive genotypes.
Table 4.
AMOVA summary for SSR.
Fig 3.
Root traits studied at seedling stage.
(A) Root distribution pattern analyzed in drought tolerant and susceptible genotypes grown under well-watered conditions in petri dishes at the interval of 6 and 9 days. (B) Relationships between root traits measured at 6 and 9 days old seedling estimated from two Clusters (I and IV) of wheat genotypes a. Total root length, Longest root, Coleoptile length and Shoot length. Total Projected area, Total Surface area and Total root volume. The solid lines indicate the best fit regression line and 95% confidence length intervals, respectively.
Fig 4.
Digital images taken from field under drought stress conditions at vegetative and reproductive stages.
Differences in the root distribution and root length production Drought tolerant wheat genotype HW2004 and drought sensitive genotype HD2877 at vegetative (A) and reproductive stage (B).
Fig 5.
Root traits of 31 wheat genotypes studied under drought stress condition at reproductive stage.
Wheat genotypes at seedling (A)and Maturity (B) stage grown in PVC pipes to examine root growth and development; (C) Representative picture showing variation in maximum root length of ten wheat genotypes grown in PVC pipes under drought stress conditions.
Fig 6.
Correlation between genetic similarity index and average taxonomic distance for root length per plant.
The genotype pair and average taxonomic distance are represented by symbol (0).