Correlation and path analysis of three elite clones of cassava (Manihot esculenta Crantz)

Abstract

Waxy cassava having high amylopectin content could contribute and increase genetic background. Unfortunately, the genetic parameter information of three elite cassava clones as Waxy, UJ-5, and BW-1 is still limited. Consequently, the objective of this study was to evaluate leaf weight and yield by correlation and path analysis of three cassava clones. This study was conducted on the Integrated Field Lab of Lampung from December 2019 to October 2020. Treatment was arranged by a single factor in RCBD with two replications. There were three cassava genotype clones, as Waxy, UJ-5 (originally Kasetsart), and BW-1 (originally Huay Bong-60). Genetics parameters were analysed by using Minitab programs (Version 17). Variables observed were plant height (PH), total leaf number (TLN), tuber number (TN), tuber fresh weight (TFW), tuber dry weight (TDW), attached leaf dry weight (ALDW), stem dry weight (SDW), petiole dry weight (PDW), starch weight (SW), and harvest index (HI). These variables were observed and measured at 10 months after planting (MAP) on one tree. The results showed that attached leaf dry weight has direct effect of 1.16 on starch weight with correlation coefficient of 0.58. It was recommended to select a criterion for high yielding of elite clones based on high attached leaf dry weight.