Prope legitimate rootstocks determine the selection criteria for drought-tolerant cocoa

Abstract

Abstract. Zasari M, Wachar A, Susilo AW, Sudarsono. 2020. Prope legitimate rootstocks determine the selection criteria for drought-tolerant cocoa. Biodiversitas 21: 4067-4075. Drought tolerant cocoa seedlings are needed for the success of cocoa cultivation under drought conditions. Prope legitimate rootstock is feasible to be used in the selection of drought-tolerant cocoa seedlings. This objective of this study was to determine the selection criteria and tolerance of prope legitimate cocoa rootstocks in response to drought stress. This study was conducted in the greenhouse of Kaliwining experimental garden, Indonesian Center for Coffee and Cocoa Research, Jember, Indonesia. Plant materials were arranged in a split-plot design with 2 factors and 6 replications. The main plot was the soil moisture content, i.e 100%, and 25%, while the subplots were 13 prope legitimate cocoa rootstocks. The result showed that root fresh weight was the best characters for the selection of drought tolerance in prope legitimate cocoa rootstock. Based on the value of stress susceptible index and clustering analysis divided the tested prope legitimate rootstock into two groups. The group for tolerant genotype was consisted of ICCRI 03, ICS 60, TSH 858, KKM 22, KW 641, KW 516, and MCC 02, while the sensitive genotype group was consisted of Sul 01, Sul 03, Sca 06, KEE 02, KW 617, and Sul 02.

The Sensitivity of Four Garlic Genotypes on Low Temperatures and the Role on Dormancy Breaking

“…These results implied that Chinese softneck which was nonbolting types garlic would require a relatively short period and a higher temperature in the vernalization treatment than other garlic genotypes to break the bulb dormancy. Generally, the sensitivity index can be used to select genotypes that are tolerant to environmental stress (Zasari et al, 2020). That statement showed that the Chinese softneck most likely has a low tolerance to cold temperature stress.…”

Eksplorasi-Karakterisasi Morfologi Kopi Robusta Lokal di Pulau Bangka

“…Karakter yang memiliki keragaman genetik yang sempit umumnya akan memiliki keragaman fenotipe yang sempit. Keragaman genetik merupakan salah satu faktor yang mempengaruhi keragaman fenotipe tanaman (Devy et al, 2018;Zasari et al, 2020).…”

Physio-Biochemical Characteristics of Prope Legitimate Seedlings of 13 Cocoa Clones Under Drought Stress

“…legitimate seeds from open pollination of a female parent whose identity is identified and a male parent growing close together. The cocoa rootstock is generally obtained from prope legitimate seeds that are easily and quickly produced into seedlings (Zasari et al, 2020).…”

“…The stomata of the abaxial part of the leaf were observed under a microscope with 10 times magnification, and the density was counted. RWC was determined at the Agronomy Laboratory of Puslitkoka Jember, Indonesia (Zasari et al, 2020).…”