Morphological variability and genetic analysis of Thalassiosira tenera (Bacillariophyta), a dominant phytoplankton species from the northwestern Sea of Japan

Phycologia ◽  
2021 ◽  
pp. 1-14
Author(s):  
Olga G. Shevchenko ◽  
Mariia A. Shulgina ◽  
Sergei V. Turanov
Keyword(s):  
Genetic Analysis ◽  
Sea Of Japan ◽  
Morphological Variability ◽  
Phytoplankton Species

scholarly journals GENETIC ANALYSIS OF THE TYPES OF DEVELOPMENT OF MUTANT LINES FROM COMMON WHEAT VARIETIES

REPORTS ◽  
2020 ◽  
Vol 6 (334) ◽  
pp. 22-28
Author(s):  
N. Sarybay ◽  
◽  
Zh. Zh. Chunetova ◽  
D. M. Iskakova ◽  
B.A. Zhumabaeva ◽  
...  
Keyword(s):  
Cell Division ◽  
Genetic Analysis ◽  
Zinc Chloride ◽  
Cadmium Chloride ◽  
Stem Elongation ◽  
Morphological Variability ◽  
Main Task ◽  
Wheat Varieties ◽  
Mutant Lines ◽  
Cadmium Salt

Among cereals, a special place is occupied by wheat as the main food of humanity and in improving the country's economy. The main task of breeding is to produce valuable wheat varieties that are stable to the unfavorable external environment of various natural climatic zones of Kazakhstan, consisting of a combination of valuable features. The prospects for the use of mutants in the process of hybridization are reflected in the achievements of world and domestic selection. The effect of various solutions of chemical compounds on the plant was observed from the first days during the growth of wheat sprouts. The growth of the first sprout of seeds treated with a certain solution of cadmium chloride and zinc chloride - 0.01%, the activity of cell division and structural disorders of chromosomes were manifested by variability in the varieties Kazakhstani3, Shagala, Zhenis and Lutescens 32. When treating dry wheat grain with a concentration of 0.1% cadmium chloride, it brought the growth of the Sprout to a lethal state, 0.01% inhibited the growth of the Sprout for 4 days, and in a 0.001% solution, the growth rate of the control grains was the same. On the contrary, a 0.1% vertical solution of zinc chloride inhibited the growth of the Sprout for 1 Week, 0.01% for three days. Among the studied concentrations, a 0.01% solution of cadmium chloride inhibited the growth of sprouts, causing chromosomal aberrations and morphological variability in cell division. Therefore, a concentration of 0.01% of cadmium salt was obtained as an optimal concentration to expand the limits of variability in wheat. In this regard, in our study, it was found that a 0.01% solution of cadmium chloride is an effective concentration that expands the limits of variability in wheat. The effect of this amount of solution leads to morphological changes in the plant (Binding of the stem, elongation of the earlobe, increase in the number and weight of grains in the headlobe, increase in the weight of 1000 grains, etc.), and changes in the characteristics of the M1 - M4 offspring are constantly inherited. Mutant lines L1, L2 and L3 differ in valuable breeding characteristics under the influence of a 0.01 percent solution of cadmium salt were obtained for the Kazakhstanskaya 3 and Shagala varieties. A genetic analysis of the type of development of these altered lines was carried out, as a result of which a long (16 cm) dense ear (0.80) changed from the Gull variety to a prismatic plant of the control variety (0.50), as a result of hybridization, its summer type (from the vrn gene) to the autumn type (Vrn gene). As a result of the study, Kazakhstanskaya 3, Kazakhstanskaya mutant 3 varieties contain the genes Vrn 1, Vrn 3. Well, it was found that Shagala varieties consist of the genes Vrnl, Vrn2. Varieties containing the genes Vrn1, Vrn3 show rapid maturation. However, they differed from each other in the period of intoxication.

First records of small-sized young giant squid Architeuthis dux from the coasts of Kyushu Island and the south-western Sea of Japan

2015 ◽  
Vol 8 ◽  
Author(s):  
Toshifumi Wada ◽  
Tsunemi Kubodera ◽  
Morihiko Yamada ◽  
Hiroyoshi Terakado
Keyword(s):  
Genetic Analysis ◽  
Sea Of Japan ◽  
Coastal Waters ◽  
Morphological Traits ◽  
Total Weight ◽  
Mantle Length ◽  
Morphometric Data ◽  
Giant Squid ◽  
Kyushu Island ◽  
First Occurrence

Three individuals of small, young giant squidArchiteuthis duxwere caught in or near Japanese coastal waters during April–June 2013. The first occurrence of a young individual of 140.8 mm dorsal mantle length with a total weight of 44.81 g was recorded on the coast off Uchinoura, Kagoshima, Kyushu Island, southern Japan. The remaining two young individuals, both measuring 332.0 mm in dorsal mantle length with total weights of 390.63 and 356.95 g respectively, were caught on the coast off Hamada, Shimane, south-western Sea of Japan. Most morphological traits of all the specimens were consistent with those ofA. dux, which was supported by further genetic analysis. Here we present some morphological traits of young giant squids with morphometric data and photographs.

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