Screening and Stability Analysis For Salinity Tolerance in Sorghum [Sorghum bicolor (L.) Moench]
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Date
2004
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Publisher
MPUAT, Udaipur
Abstract
Present investigation entitled “Screening and Stability Analysis for Salinity
Tolerance in Sorghum [Sorghum bicolor (L.) Moench]” was carried out with 100
genotypes of sorghum collected over the different agroclimatic zones of Rajasthan
which were evaluated on different salinity levels in CRD. The four salinity levels of 0
dSm-1, 3 dSm-1, 6 dSm-1 and 9 dSm-1 were prepared by supplementing Hoagland’s
solution with different salts such as NaCl, MgSO4, CaCl2 and NaHCO3 in different
ratio. 20 seeds of each genotype were sown in petridishes and irrigated with 5 ml of
test solution after draining the previous day’s solution for the first five days, which
was later, increased to 10 ml.
Observations were recorded for nine characters viz. germination percentage,
seedling height, coleoptile length, fresh weight of shoot per seedling, fresh weight of
root per seedling, dry weight of shoot per seedling, dry weight of root per seedling,
ratio of fresh weight of shoots to fresh weight of roots and ratio of dry weight of
shoots to dry weight of roots.
The analysis of variance for all the traits revealed considerable variability in
the experimental material and environments. Environment S0 was identified as most
favourable environment and the mean values showed reduction along the salinity
gradient. Genotype Raj 42 and Raj 36 exhibited higher mean performance for a
number of attributes at varied salinity levels. Dry weight of roots per seedling showed
high estimate of GCV, heritability and genetic gain in all the four salinity levels.
Hence, it was concluded that experimental material possess potential for improvement
in this trait.
The correlation among all the characters was found generally to be highly
significant and positive. Based upon this, correlation between fresh weight of shoot
per seedling with fresh weight of root per seeding, dry weight of shoot per seedling,
ratio of dry weight of shoots to dry weight of roots and ratio of fresh weight of shoots
to fresh weight of roots should be used as a criterion for selection of salt tolerance
particularly for germination and seedling establishment.
Analysis of variance for stability parameters showed significant difference
among genotypes and considerable G x E interaction. Genotypes Raj-21, Raj-29, Raj-
34, Raj-48, Raj-49, Raj-57, Raj-60, Raj-61, Raj-65, Raj-68, Raj-79, Raj-80 and Raj-
86 for germination percentage, Raj-51 for seedling height and Raj-7 for ratio of dry
weight of shoots to dry weight of roots showed stability under wider salinity levels.
Genotypes Raj 27, Raj 30 and Raj 4 were found promising for salinity tolerance.
Further, evaluation of genotype Raj 42 is also suggested.
Description
Screening and Stability Analysis For
Salinity Tolerance in Sorghum
[Sorghum bicolor (L.) Moench]
Keywords
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Citation
Kulharia and Choudhary, 2004