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High Temperature Tolerant Genotypes of Finger Millet (Eleusine coracana L.)


Affiliations
1 Agricultural Research Station, Hagari-583138, Ballari, UAS, Raichur, Karnataka, India
2 All India Coordinated Improvement Project on Small Millets, UAS, Bangalore, ZARS, GKVK Farm, Bangalore-560 065, Karnataka, India
 

Finger millet varieties grown by farmers can grow and sustain well up to a temperature maximum of 36°C. However, increase in temperature above these limits has a drastic effect on production and leads to crop failure. The aim of the study is to screen and evaluate existing variation among distant genotypes with respect to high temperature stress tolerance. Screening involved, 422 germplasm accessions of finger millet that were evaluated under field condition. Kharif sown accessions were considered as standard control, which performed normal in all stages of plant growth, reproductive and seed development stages under a temperature range of 28°C to 32°C. Whereas, summer sown accessions, which were subjected to high temperature stress (upto 42°C to 44°C), with lower rainfall pattern, severely affected plant growth and development. Prominent traits such as plant height, chlorophyll content, number of branches, ear head length, finger length, grain size and grain yield were significantly reduced in summer grown accessions in comparison to Kharif crop. Only 133 accessions out of 422 could reach flowering stage and 289 accessions failed to flower in higher temperatures of summer. However, few genotypes which exhibited better tolerance against high temperature of summer are recorded and further carried over to breeding stress tolerant programme.

Keywords

Heat stress, Ragi (Eleusine coracana), Genotypes, Tolerance.
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  • High Temperature Tolerant Genotypes of Finger Millet (Eleusine coracana L.)

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Authors

L. N. Yogeesh
Agricultural Research Station, Hagari-583138, Ballari, UAS, Raichur, Karnataka, India
A. B. Naryanareddy
All India Coordinated Improvement Project on Small Millets, UAS, Bangalore, ZARS, GKVK Farm, Bangalore-560 065, Karnataka, India
Y. A. Nanjareddy
All India Coordinated Improvement Project on Small Millets, UAS, Bangalore, ZARS, GKVK Farm, Bangalore-560 065, Karnataka, India
M. V. Channabyre Gowda
All India Coordinated Improvement Project on Small Millets, UAS, Bangalore, ZARS, GKVK Farm, Bangalore-560 065, Karnataka, India

Abstract


Finger millet varieties grown by farmers can grow and sustain well up to a temperature maximum of 36°C. However, increase in temperature above these limits has a drastic effect on production and leads to crop failure. The aim of the study is to screen and evaluate existing variation among distant genotypes with respect to high temperature stress tolerance. Screening involved, 422 germplasm accessions of finger millet that were evaluated under field condition. Kharif sown accessions were considered as standard control, which performed normal in all stages of plant growth, reproductive and seed development stages under a temperature range of 28°C to 32°C. Whereas, summer sown accessions, which were subjected to high temperature stress (upto 42°C to 44°C), with lower rainfall pattern, severely affected plant growth and development. Prominent traits such as plant height, chlorophyll content, number of branches, ear head length, finger length, grain size and grain yield were significantly reduced in summer grown accessions in comparison to Kharif crop. Only 133 accessions out of 422 could reach flowering stage and 289 accessions failed to flower in higher temperatures of summer. However, few genotypes which exhibited better tolerance against high temperature of summer are recorded and further carried over to breeding stress tolerant programme.

Keywords


Heat stress, Ragi (Eleusine coracana), Genotypes, Tolerance.

References