The Cucurbitaceae has been known to many farmers as a plant that has beneficial for agriculture industries. For decades plants that belong to Cucurbitaceae such as cucumber (Cucumis sativus), watermelon (Citrullus lanatus), and melon (Cucumis melo) has been cultivated to meet consumer needs. In Indonesia, a new variety of melon has been discovered namely apple cucumber. This new variety has blurred the difference between melon and cucumber due to the vegetative resemblance. This research was conducted to clarify the different characters and to study the morpho-agronomic characteristic in qualitative and quantitative-based on IPGRI descriptors. Important and significant diagnostic characters were observed to developed good cultivar in quality and quantity. 16 qualitative and 15 quantitative characters from 120 characters of apple cucumber were observed to determine the specific characters for good cultivar. Principal Analysis Component (PCA) using Python was used to showed discriminative character and also to distinguished apple cucumber to melon and cucumber based on 120 characters of apple cucumber. Morphological differences existing among melon, cucumber, watermelon, and apple cucumber, in particular, are presented.

Cucurbitaceae is one of the largest family in Angiosperm in which the most member of this family is important fruit crops in Indonesia such as Cucumber, Melon, Watermelon, and Apple Cucumber. In particular, Apple Cucumber, currently attracts attention to many researchers due to its phylogeneticand taxonomic problem. In term of its appearance, the fruit looks like an apple but the taste is melon. The purpose of this study was to elucidatephylogenetic relationship between Apple Cucumber and other species of Cucurbitaceae based on variation of DNA sequences derived from internal transcribed spacer (ITS) region. As many as six individuals of Apple Cucumber collected from Karawang, Jember, and Aceh were examined. The ITS sequences of some species of family Cucurbitaceae were retrieved from GenBank, and put them in the analysis. Phylogenetic analysis based on parsimony method with using Begoniaas outgroup reveals that Apple Cucumber are nested in the same clade as Melon (Cucumis melo) with high bootstrap value (100%), suggesting that Apple Cucumber is under the same species as Melon. However, on the basis of morphological characters of fruit, apple cucumber is different with that of Melon. This considerably first phylogenetics treatment provides fundamental knowledge for establishing a subspecies of Melon.

Global climate change will imply to increase in atmospheric temperature, which can affect the sensitive stadia and decrease rice yield. The objective of this research was to study the growth and production of rice varieties under hightemperature stress. This research was conducted using a split-plot design under partitioned polyethylene house in order to create temperature differences among main-plots. The partitioned treatment successfully increased by 1.7 °C of average temperature with a maximum temperature of 35.0 °C (T1) and 37.6 °C (T2). Rice varieties, namely IR64, Ciherang, IPB-3S, Way Apo Buru, Jatiluhur, Menthik Wangi and Silugonggo were randomized as sub-plot. The results showed that increasing temperature had no significant effect on plant height, tiller number, SPAD-value, leaf area index, and crop growth rate, but significantly decreased 1,000 grains weight by 4.57% and harvest index by 20%. The interaction between temperature and varieties significantly affected a percentage of a productive tiller and partially filled spikelets. Ciherang variety produced the lowest percentage of productive tillers on T2 by 57.6%. Way Apo Buru variety produced the lowest percentage of partially filled spikelets on T2 by 3.01%.

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