Agricultural Science Digest
SCOPUS
  • Year: 2024
  • Volume: 44
  • Issue: 5

Variability in starch content, starch granule morphology and size distribution of three cassava (Manihot esculenta) genotypes in relation to yield, at different planting seasons

  • Author:
  • J.I. Reuben-Kalu1,2,*, E. Kokiladevi2, M. Raveendran2, D. Uma3, V. Balasubramani2, P.S. Kavitha4, S.G. Patil5, T.L. Kingsley1
  • Total Page Count: 7
  • Page Number: 830 to 836

1Biotechnology Research and Development Center, National Root Crops Research Institute, Umudike, Abia State, Nigeria

2Department of Plant Biotechnology, Center for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

3Department of Biochemistry, Center for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

4Nammazhvar Organic Farming Research Centre, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

5Department of Physical Sciences and Information Technology, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

*Corresponding Author: J.I. Reuben-Kalu, Biotechnology Research and Development Center, National Root Crops Research Institute, Umudike, Abia State, Nigeria, Email: janereubenkalu@gmail.com

Online published on 12 November, 2024.

Abstract

Investigation of the biochemical profile and storage root yield of three cassava genotypes (H-165, H-226 and TME-419) was carried out. Planting was done at three different seasons: summer, early monsoon and late monsoon.

The storage roots were harvested at intervals of 6, 9 and 12 months after planting to evaluate their yield. Granule morphology of the starches and biochemical characteristics of the flours were examined using electron microscopy and biochemical techniques.

Significant variations were observed in the starch content, root yield and size of starch granule, which were mainly dependent on planting dates, while the variations recorded in starch granule morphology, amyloseaa and amylopectin contents were influenced by genotype. The highest starch (33.5%) and amylose content (18.9%) were observed in TME-419 variety. The rate of storage root yield had positive correlation with maximum temperature and sunshine and negative correlation with humidity and rainfall. This study indicated that cultivation season affects starch accumulation and root yield in cassava and can be applied in developing cassava varieties with high starch and root yield, suitable for different planting seasons.

Keywords

Amylopectin, Amylose, Cassava genotypes, Planting dates, Root yield, Starch, Starch granule size