PHYSIOLOGICAL TRAITS FOR YIELD POTENTIAL UNDER OPTIMAL PRODUCTION ENVIRONMENT IN FINGER MILLET (Eleusine coracana (L) Gaertn)
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Date
2017-08-08
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The crop yield has reached a plateau in recent years. Further improvement is
possible through incorporation of physiological traits rather than yield per se alone.
Therefore, it would be appropriate to analyze critically the yield components and exploit
the germplasm for such traits. Hence identification of germplasm accessions for
physiological traits attributing to higher grain yield and their incorporation in breeding
programme would be highly effective. Therefore, a large set of 348 germplasm
accessions including popular varieties were characterized for physiological and yield
attributes. Biomass (0.74) and harvest index (0.535) had direct positive influence on grain
yield and were determined by mean ear weight, productive tillers and threshing percent.
Among the physiological traits, the LAI, SPAD and leaf temperature indirectly
influenced the grain yield through biomass production. The superior accessions over the
GPU-28 for higher LAI were GE-1026, GE-1855, GE-4398, GE-4963; for higher SPAD
were GE-50, GE-292, GE-824, GE-1013, GE-1126, GE-1360, GE-2216, GE-2650, GE-
4004, GE-4597, GE-5117 and Sharada (> 41.7) and for lower leaf temperature were GE-
824, GE-1013, GE-1360, GE-3314, GE-4962 and GE-4983 (< 22.9 °C) with higher seed
yield as compared to the GPU-28. These donors as multi-parents can be used to develop
MAGIC population and subsequent selection for improved grain yield. Selected high
yielding genotypes showed higher seedling vigour, phytic acid and hydrolytic enzyme
(DHA) as compared to the low yielding genotypes. These parameters may be used as
surrogate for preliminary screening of large number of germplasm for yield potential in
finger millet.
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