scholarly journals Investigation of Clonal Structure and Self-incompatibility in Japanese Endemic Snow Camellia (Camellia rusticana)

2021 ◽  
Vol 70 (1) ◽  
pp. 137-144
Author(s):  
Hiroki Kohama ◽  
Harue Abe ◽  
Yoshinari Moriguchi
Keyword(s):  
Clonal Propagation ◽  
Snow Accumulation ◽  
Harsh Environments ◽  
Self Incompatibility ◽  
Clonal Structure ◽  
High Quality ◽  
Suitable Habitats ◽  
High Quality Seed ◽  
Number Of Seeds ◽  
Crossing Test

Abstract We investigated the clonal structure, self-incompatibility, and number of seeds per fruit in Camellia rusticana, a Japanese endemic species, in comparison to the closely related C. japonica. Clonal propagation was more vigorous in C. rusticana than in C. japonica and the clonal structure of C. rusticana varied among populations. C. rusticana can maintain genets for extended periods, even in harsh environments such as high-altitude areas with considerable snow accumulation, because even a single surviving genet can propagate clonally. However, sexual reproduction (i.e., reproduction by seed) is advantageous for dispersal to distant suitable habitats. An artificial crossing test revealed high self-incompatibility in C. rusticana, as observed in C. japonica. In addition, the number of seeds per fruit was lower in C. rusticana than in C. japonica. Self-incompatibility in C. rusticana may play a role in production of high-quality seed, despite low seed production.

scholarly journals Seed research for improved technologies

1998 ◽  
Vol 55 (spe) ◽  
pp. 19-26 ◽  
Author(s):  
R.J. Bino ◽  
H. Jalink ◽  
M.O. Oluoch ◽  
S.P.C. Groot
Keyword(s):  
Cell Cycle ◽  
Cell Proliferation ◽  
Quality Assurance ◽  
Seed Germination ◽  
Seed Quality ◽  
Molecular Level ◽  
Control Mechanisms ◽  
High Quality ◽  
Production Chain ◽  
High Quality Seed

The production of high-quality seed is the basis for a durable a profitable agriculture. After production, seed is processed, conditioned, stored, shipped and germinated. For quality assurance, seed quality has to be controlled at all steps of the production chain. Seed functioning is accompanied by programmed transitions from cell proliferation to quiescence upon maturation and from quiescence to reinitiation of cellular metabolism upon imbibition. Despite the obvious importance of these control mechanisms, very little information is available at the molecular level concerning those elements that regulate seed germination. In the present study, the induction of cell cycle activity and the regulation of ß-tubulin expression is related to the water content and other physical properties of the seed.

scholarly journals Improving the Mechanization of High-Quality Seed Production

2018 ◽  
Author(s):  
Vladimir Ivanovich Orobinsky ◽  
Alexander Pavlovich Tarasenko ◽  
Aleksey Mikhailovich Gievsky ◽  
Aleksey Viktorovich Chernyshov ◽  
Ivan Vasilyevich Baskhakov
Keyword(s):  
Seed Production ◽  
High Quality ◽  
High Quality Seed

scholarly journals DEVELOPMENT OF FIELD CROP SEED PRODUCTION IN RUSSIA

2020 ◽  
Vol 8 (3) ◽  
pp. 81-85
Author(s):  
Artem Lukomec
Keyword(s):  
Food Security ◽  
Seed Production ◽  
Production System ◽  
Selection Process ◽  
Biological Properties ◽  
Field Crop ◽  
High Quality ◽  
Main Condition ◽  
Field Crops ◽  
High Quality Seed

Seed production of field crops plays a key role in ensuring food security of the country and is a continuation of the selection process, a necessary link for the development and maintenance of the variety. In seed production, the main object is a variety that is genetically close to each other a certain group of plants, homogeneous in morphological and biological properties. The finish of high-quality seed production is seeds with good varietal and sowing qualities. The main condition for effective production of field crops is a well-established seed production system, which is a set of functionally interconnected structures engaged in the production of elite and reproductive seeds. Seed production of field crops solves two main tasks: variety exchange and variety renewal. When a variety is changed, one zoned variety is replaced by another with more valuable economic characteristics. During variety renewal, varietal seeds in farms are replaced with seeds of the same varieties, but of higher reproductions. Usually, seeds for cereals and legumes are updated every 3-4 years, for millet - every 2 years, for sunflower - annually. The main goal of seed production of field crops is to maintain a set of characteristics of the variety, its most valuable qualities and economic indicators.

Evaluation of spring soft wheat varieties and zonal features of seed production in the Altai Territory

2021 ◽  
pp. 54-71
Author(s):  
S. V. Zharkova ◽  
E. I. Dvornikova
Keyword(s):  
Seed Production ◽  
Field Studies ◽  
Quality Parameters ◽  
Scientific Data ◽  
Soft Wheat ◽  
Forage Crops ◽  
High Quality ◽  
Wheat Varieties ◽  
Spring Soft Wheat ◽  
High Quality Seed

One of the leading grain crops in Russia is spring wheat. This is a strategic food crop of our country; it is also an important component in the structure of forage crops for monogastric animals, such as pigs and poultry. The purpose of the research was to evaluate spring soft wheat varieties of different maturity groups in order to identify genotypes as the starting material for obtaining varieties adapted to the cultivation zones, and to determine the areas optimal for the production of grain for seed purposes with high quality indicators. Field studies have been carried out in three ecologically different zones: the Priobskaya zone, the Prialtaiskaya zone, and the Prisalairskaya zone. Under the conditions of the Altai Territory, genetic sources of spring soft wheat have been identifi ed for different soil and climatic parameters of the study zones, the use of which will allow obtaining high-yielding varieties with high quality grain for specific cultivation conditions. The variability of the indicators of the characteristics of varieties in three ecologically different zones has been determined. The indicators of adaptability and stability of spring soft wheat varieties in different zones of cultivation have been determined. The optimal zones for conducting breeding work and seed production of varieties have been identifi ed. New scientific data on the quality parameters of seed grain in various agro-climatic zones of the Altai Territory have been obtained. The share of the contribution of the factors “variety”, “year”, “environment” to the variability of grain quality characteristics has been established. The economic efficiency of cultivating varieties of spring soft wheat for the production of high-quality seed grain has been determined.

Mating system and cross-compatibility of races of Epacris impressa

1982 ◽  
Vol 30 (2) ◽  
pp. 131 ◽  
Author(s):  
YJ Fripp
Keyword(s):  
Mating System ◽  
Hybrid Seed ◽  
Self Incompatibility ◽  
Low Level ◽  
Cross Compatibility ◽  
Outcrossing Species ◽  
Different Populations ◽  
Number Of Seeds

The mating system and cross-compatibility of races of Epacris impressa Labill. were examined by a series of selfings, outcrosses between plants of the same race from the same and different populations, and outcrosses between plants of different races. The percentage of pollinations which gave capsules and the number of seeds present per capsule for these four types of crosses, and whether the seeds germinated, were scored. The results indicate that E. impressa is an outcrossing species with a self-incompatibility mechanism to keep selfing at a low level, the races cross freely and the hybrid seed is viable. The means over all races for the above four types of crosses were 8.7 (selfing), 62.3, 62.5 and 65.5 for the percentage of pollinations that were successful and 8.4 (selfing), 43.5, 41.2 and 39.0 for the number of seeds per capsule. The results of a limited number of crosses between Epacris impressa and other epacrid species are also given.

scholarly journals A SUMMER FIELD GRAFTING TECHNIQUE FOR PINE

1959 ◽  
Vol 35 (1) ◽  
pp. 30-35
Author(s):  
D. P. Fowler
Keyword(s):  
Growing Season ◽  
Early Summer ◽  
High Quality ◽  
Grafting Technique ◽  
High Quality Seed ◽  
Pine Species

Field grafting is an important tool of tree breeders and other foresters concerned with the production of high quality seed for forestry purposes. Field grafting of many pines is carried out in the early summer during a period which is usually crowded with pollination and nursery work. This paper describes a summer grafting technique by which it is possible to successfully field graft pine species late in the growing season using current year's growth for scion and stock material.

scholarly journals The potential for production of high quality seed potatoes in Tierra del Fuego Island, Argentina

1999 ◽  
Vol 42 (1) ◽  
pp. 9-23 ◽  
Author(s):  
D. O. Caldiz ◽  
O. H. Caso ◽  
G. Vater ◽  
L. V. Fernandez
Keyword(s):  
Tierra Del Fuego ◽  
High Quality ◽  
Seed Potatoes ◽  
High Quality Seed
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