Skip to main content
ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #380745
Research Project: Development of High-Yielding, High-Oleic Peanut Cultivars or Germplasm with Tolerance to Biotic and Abiotic Stresses

Location: Crop Genetics and Breeding Research

Title: Accumulation dynamics of starch and it's granule size distribution of Cassava genotypes at different growing seasons

Author
item JANKET, A - Khon Kaen University
item VORASOOT, N - Khon Kaen University
item TOOMSAN, B - Khon Kaen University
item KAEWPRADIT, W - Khon Kaen University
item THEERAKULPISUT, P - Khon Kaen University
item Holbrook, Carl - Corley
item KVIEN, C - University Of Georgia
item JOGLOY, S - Khon Kaen University
item BANTERNG, P - Khon Kaen University

Submitted to: Agriculture
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/25/2020
Publication Date: 8/28/2020
Citation: Janket, A., Vorasoot, N., Toomsan, B., Kaewpradit, W., Theerakulpisut, P., Holbrook Jr, C.C., Kvien, C.K., Jogloy, S., Banterng, P. 2020. Accumulation dynamics of starch and it's granule size distribution of Cassava genotypes at different growing seasons. Agriculture. 10,380:1-16. https://doi.org/10.3390/agriculture10090380.
DOI: https://doi.org/10.3390/agriculture10090380

Interpretive Summary: Although cassava can be planted throughout the year, its starch qualities may vary based on the date of planting. Seasonal variation for starch content, starch yield, starch granule size and amylose content of three cassava genotypes grown under early rainy season (ERS) and post rainy season (PRS) were studied for two years in Thailand. The starch yield was more strongly associated with growing season, whereas starch content, amylose content, amylose-amylopectin ratio were more associated with genotypes. Cassava planted in the PRS had higher starch yield than the ERS for most genotypes except for Rayong 11, which had no significant differences between growing seasons. CMP38-125-77 was a preferable genotype, since it had a faster rate of starch formation and more starch and amylose contents, as well as starch yield in both ERS and PRS.

Technical Abstract: This study aims to evaluate seasonal variation on starch production of different cassava genotypes planted under irrigated conditions. Three cassava genotypes (Kasetsart 50, Rayong 11 and CMP38-125-77) were evaluated in two different growing seasons, i.e., early rainy season (ERS) and post rainy seasons (PRS) for two years. A randomized complete block design with four replicates was employed in each growing season. The starch yield was more strongly associated with growing season (28.3%), whereas starch content, amylose content, amylose-amylopecitin ratio were more associated with genotypes (19.9 - 30.7%). Planting cassava in the ERS had rapid growth rates of starch yield and granule size in early growth stages, whereas planting cassava in the PRS had rapid growth rates of these traits in the middle to late growth stages. Cassava planted in the PRS had rapid growth rates of these traits in the middle to late growth stages. Cassava planted in the PRS had higher starch yield than the ERS for most genotypes except for Rayong 11, which had no significant differences between growing seasons. The yield and content of starch and size of starch granule continuously increases from four to twelve months after planting (MAP) for most cassava genotypes. Unlike other genotypes, CMP38-125-77 in the ERS gave the highest starch yield and its granule at 10 MAP; however, at 12 MAP, it was still higher than other genotypes. CMP38-125-77 was a preferable genotype, since it had a faster rate of starch formation and more starch and amylose contents, as well as starch yield in both ERS and PRS.