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Results and
discussion
The dry matter yield of both the mutants was significantly (p<
0.05) less as compared to the varieties (Table
1). The dry
matter yield of C 306 was also higher as compared to WH 147.
Phosphorus concentration of WH 147 mutant was significantly (p<
0.05) higher to WH 147 but it was significantly less in C 306 mutant
as compared to variety C 306. Total P uptake by mutant and variety of
WH 147 was statistically at par, but it was significantly (p<
0.05) less in mutant than variety of C 306. The less P uptake by the
mutant of C 306 was primarily due to low yield and P content. The
mutant of WH 147 absorbed about 5% less fertilizer P, indicating
thereby that the utilization of native P by mutant of WH 147 was
higher as compared to variety WH 147. Whereas, incase of mutant and
variety of C 306, there was very little difference in the utilization
of native and added phosphorus. These observations lend support to
the earlier findings of Behl and Malhotra (1991) that grain F content
of WH 147M was significantly higher than that of WH 147. The
fertilizer use efficiency by both the varieties was significantly
(p< 0.05) higher as compared to their mutants.
From these results, it can be concluded that the mutants of wheat
varieties can utilize native soil F and thus reduce the fertilization
cost of phosphatic fertilizers. However, these results are to be
tested in field experiments.
References
Behl RK and Malhotra S (1991) Proximate analysis in a high
temperature tolerant wheat mutant and its mother cultivar. J Nuclear
Agric Biol 20: 146-148.
Behl RK, Sheoran IS, Singh G and Kuhad MS (1986) Performance of
radiation induced high temperature tolerant spring wheat mutant under
different environmental conditions. Proc Int Seminar on Water
Management in Arid and Semi-Arid Zones. UNESCO Pub. pp 260-273.
Koenig RA and Johnson CR (1942) Colorimetric determination of
phosphate in biological materials. Ind Engng Chem. (Analyt. Ed) 14:
155-156.
Mackenzie AJ and Dean LA (1948) Procedure for measurement of
P31
and
P32
in plant materials.
Anal Chem 20: 559-560.
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