Tag Archives: morphological trait

xxx L.N. Fadilah, B. Lakitan and M. Marlina
Effects of shading on the growth of the purple pakchoy (Brassica rapa var. Chinensis) in the urban ecosystem
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Effects of shading on the growth of the purple pakchoy (Brassica rapa var. Chinensis) in the urban ecosystem

L.N. Fadilah¹, B. Lakitan²³* and M. Marlina²

¹Program of Crop Science, Faculty of Agriculture, Universitas Sriwijaya, Jalan Padang Selasa No. 524, Bukit Besar, Palembang 30139, South Sumatera, Indonesia
²Faculty of Agriculture, Universitas Sriwijaya, Jalan Raya Palembang–Prabumulih Km 32, Indralaya, Ogan Ilir 30662, South Sumatera, Indonesia
³Research Center of Sub–optimal Lands, Universitas Sriwijaya, Jalan Padang Selasa No. 524, Bukit Besar, Palembang 30139, South Sumatera, Indonesia
*Correspondence: blakitan60@unsri.ac.id

Abstract:

Open green spaces in urban area can be utilized in many ways. Recently, more of the open spaces have been cultivated for vegetable production, gradually shifted from aesthetical purpose to the need for fresh healthy foods. Urban vegetable farming can be conventionally practiced on a limited backyard. Our research was aimed to assess the effects of shading treatments on growth and yield of purple pakchoi (Brassica rapa var. chinensis). The research was arranged based on the randomized block design with 4 levels of shading treatment. The results showed that shading treatments at 0%, 45%, 55%, and 80% significantly affected morphological growth traits, including plant height, number of leaf, lengths of petiole, length of leaf midrib, width of leaf blade, canopy diameter, and leaf SPAD index, total leaf fresh and dry weights, total fresh and dry roots, and lengths of stem; but did not significantly affect the leaf thickness. In all affected traits, heavier shading inhibited growth, confirming that the purple pakchoi prefers full sunlight. The leaf of purple pakchoi reached its maximum size at less than 14 days counted from the first day of leaf blade was fully unfolded. Purple pakchoi can be harvested at 35 days after transplanting. The accurate leaf area estimation in purple pakchoi can be achieved by using LW as predictor and calculated using the power regression (R² = 0.9806).

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2489–2500 E.F. Myagkikh, S.S. Babanina, V.S. Pashtetsky and M.Yu. Karpukhin
Morphological variability of phenotypic traits in of oregano samples
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Morphological variability of phenotypic traits in of oregano samples

E.F. Myagkikh¹*, S.S. Babanina¹, V.S. Pashtetsky¹ and M.Yu. Karpukhin²

¹Research Institute of Agriculture of Crimea, Kievskaya Str., 150, RU295453 Simferopol, Republic of Crimea, Russia
²Ural State Agrarian University, Karla Libknekhta Str., 42, RU620075 Yekaterinburg, Russia
*Correspondence: myagkih_e@niishk.ru

Abstract:

The purpose of the research was to study the morphological variability of collection samples of oregano of the Crimean Peninsula. The experiments were carried out in 2016–2018 in the Foothill Zone of Crimea. The plant material consisted of 41 samples of origanum collected on the Crimean Peninsula territory. The degree of identification reliability of oregano collection samples by morphological traits was checked. The construction of relationship dendrograms was carried out by the Ward’s method based on the Manhattan distances. It was found that qualitative traits (coloration of corolla, leaf, bract, stalk and male fertility) showed themselves more consistently than quantitative ones. It was recommended to use the most polymorphic traits (entropy, H > 1.50 bits) for reliable identification of oregano samples from the Crimean peninsula: coloration of bract, stem, leaf and corolla, as well as the number of shoots and mass fraction of essential oil. The structure of the association differed by the years of study when constructing dendrograms (r = 0.58).Nevertheless, a fairly clear correspondence of the clusters of different years’ clusters to each other was established (78% of the samples). The established correspondence indicates the reliability of the genotypes combination into separate groups (clusters) and their similar reaction to environmental conditions. The most interesting combinations of samples for further breeding work were identified – these are clusters 2 and 5 (according to the 2018 data). In 42.7% of genotypes from the second cluster, the mass fraction of essential oil was at the level of 0.25–0.55% of the absolute dry mass (4–6 points). The samples from the second cluster could be used as high-oil sources, whereas samples from fifth cluster – as sources of high productivity of ‘green’ raw materials (up to 1,200 g plant-1). It is advisable to select parental forms from these two clusters for hybridization. The grouping of origanum samples used in the work divides the samples quite accurately separated them not only on qualitative, but also on economically valuable traits.

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