Author: Mohsen ChebbiPublisher:
ISBN:
Category : Germination
Languages : en
Pages : 94
Book Description
Effects of Seed Specific Gravity on Germination, Field and Storage Performance in Wheat (Triticum Aestivum L.)
Author: Mohsen ChebbiPublisher:
ISBN:
Category : Germination
Languages : en
Pages : 94
Book Description
Effects of Seed Specific Gravity and Seed Size on Vigor and Field Performance in Wheat Seed
Author: Juvent BaramburiyePublisher:
ISBN:
Category : Seed technology
Languages : en
Pages : 126
Book Description
The Effect of Preharvest Sprouting on Seed Germination, Storability, and Field Performance of Four Winter Wheat Varieties (Triticum Aestivum L.) Grown in Michigan
Author: Sabry Gobran EliasPublisher:
ISBN:
Category : Germination
Languages : en
Pages : 306
Book Description
Pathogens of Soybean Seeds
Author: Andrew KalinskiPublisher: DIANE Publishing
ISBN: 0788179896
Category :
Languages : en
Pages : 96
Book Description
Effect of Seed Deterioration on Germination of Wheat Under Environmental Stresses
Author: Mya ThanPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 114
Book Description
Germinating seeds often encounter stress conditions of temperature, moisture and oxygen in the field. Germination tests conducted under these stress conditions in the laboratory might be methods of differentiating high and low vigor seeds. The objectives of this study were to (1) determine if these stress conditions reduce germination performance of low vigor seeds more than high vigor seeds, and (2) determine the potential for using one or more of these stress environmental conditions as the basis of a vigor test to predict relative field performance of wheat seed. Seed lots of varying levels of deterioration were produced by artificial aging of 'Malcolm' wheat (Triticum aestivum L.). Germination tests were conducted at temperatures of 5, 10, 15, 20, 25, and 30°C; water potentials of 0, -0.2, -0.4, -0.6, -0.8, -1.0, -1.2, and -1.4 MPa; and oxygen levels of 2, 4, 8, 12, 16% and air (21%). The water and oxygen stresses were applied at six temperatures. Laboratory germination results were compared to field emergence percentages of artificially and naturally aged seed lots. Germination percentage and rate of germination of low vigor seeds were depressed more than that of high vigor seeds at all water potentials and temperatures. At 20°C, for example, germination percentage of high, medium and low vigor seed lots at -0.6 MPa were 76, 48 and 29% respectively, compared to nearly 100% at 0, -0.2 and -0.4 MPa. Similar relationships existed at the other temperatures. Germination of low vigor seed generally declined with each reduction of oxygen level while that of high vigor seed remained nearly constant. The germination differential between high and low vigor seed lots widened to as much as 30% in 2% oxygen at 30°C. Twenty-four naturally-aged seed lots representing six varieties and four production years were evaluated for germination under water stress and field emergence. Correlation coefficients between germination at -0.6 MPa and field emergence were 0.61** and 0.59** for untreated and Arasan-treated seeds, respectively. It is clear from these studies that environmental stresses reduce the germination of low vigor seeds more than that of high vigor seeds. A vigor test based on one or more of these stresses has potential for being a practical and realistic method of predicting the relative field performance of wheat seed lots.
Determination of Seed Storage Potential of Natural and Accelerated Aged Wheat (Triticum aestivum)
Author: Davender ChauhanPublisher: GRIN Verlag
ISBN: 3640980182
Category : Science
Languages : en
Pages : 8
Book Description
Research Paper (postgraduate) from the year 2010 in the subject Biology - Botany, grade: None, , course: Doctorate in Seed Science and Technology, language: English, abstract: ABSTRACT: Seed of six varieties of wheat (Triticum aestivum) viz. C-306, PBW-502, WH-542, WH-711, WH-283 and RAJ-3765 were subjected to natural vis-à-vis accelerated ageing conditions and evaluated for relative storage potential of the seeds of respective varieties and ageing conditions. Seeds of all the varieties found 18 months of storability except the variety C-306 in term of minimum seed certification standards (MSCS) for germination percentage. Whereas variety RAJ-3765 was adjudged to have poor storability as it showed 18 months of seed storage potential under ambient conditions. After two years of storage all the wheat varieties loss their germination below minimum seed certification standards (MSCS). Maximum germination percentage retained by variety PBW-502(79.00), considered to have good storability as compared to others whereas minimum germination percentage retained by variety C-306(71.33) found to have poor storability. In case of accelerated aged seed lot maximum germination percentage retained by variety PBW-502(55.00) showed good storability whereas RAJ-3765(44.00) retained minimum germination percentage which showed poor storability among all varieties followed by C-306(47.00). Thus in both conditions natural and accelerated aged seed PBW-502 was adjudged good and RAJ-3765 was as poor storage genotypes. Secondly accelerated aged seed is having poor storability as compare to natural aged seed.
Bibliography of Agriculture
Author: Effect of Soil Moisture, Temperature, Bulk Density, and Texture on Emergence of Three Wheat Varieties (Triticum Aestivum, L)
Author: Mahmut Basri HalitligilPublisher:
ISBN:
Category : Wheat
Languages : en
Pages : 148
Book Description
The effects of soil moisture ( -2 to -17 bars), temperature (5 to 20°C), bulk density (0.90 to 1.40 gm/cm3) and texture (Bashaw silty clay and Woodburn silt loam) on germination and seedling emergence of three varieties (Yamhill, Bezostaya, Kirac 66) of wheat (Triticum Aestivum, L.) were evaluated under laboratory and field conditions. Experiments include: 1) germination of three wheat varieties in osmotic solutions made from Carbowax 6000 to evaluate the effect of osmotic potential and temperature oi germination, 2) measurement of seedling emergence for three wheat varieties in Bashaw and Woodburn soils as influenced by soil water potential and temperature, 3) measurement of seedling emergence for the three varieties at three planting dates to test the applicability of the laboratory response to field conditions, and 4) measurement of seedling emergence of Kirac 66 as affected by bulk density and soil water potential in Bashaw and Woodburn soils. The effect of seed protein content on germination and emergence was evaluated by using high and low protein samples (16.50 and 7.75 percent, respectively) of Yamhill wheat in the first three experiments. The number of days required to obtain 50 and 80 percent germination in osmotic solutions and seedling emergence in soil was significantly increased by lowering either temperature or water potential. Although significant interactions were measured, temperature affected germination more than water potential. There was a significant difference in the germination and emergence times of Yamhill, Bezostaya and Kirac 66. Kirac 66 emerged the fastest while Bezostaya consistantly emerged the slowest. Seed protein did not affect germination or seedling emergence of Yamhill variety. Models were developed using linear regression analysis for the laboratory seedling emergence study to predict the number of days required to obtain 50 and 80 percent emergence in Woodburn soil and 50 percent in Bashaw soil as a function of soil water potential and soil temperature. Since the response to the variables were similar, the models were composite for the three varieties. The models were used to determine soil water potential and temperature combinations which permit emergence to occur within a specified time. Soil texture and bulk density significantly affected the time required for seedling emergence. More days were required to obtain seedling emergence in Bashaw silty clay than in Woodburn silt loam soil at given soil water potential primarily because of less seedsoil contact. Emergence was delayed by bulk densities greater than 1.20 and 0.90 gm/cm3 in Woodburn and Bashaw soils, respectively, because of increased soil strength. Data collected from three seeding dates made in the field in general confirmed the findings in the laboratory concerning the effects of soil moisture and temperature. Bezostaya emerged the slowest while Yamhill emerged the fastest. Seed protein content did not affect emergence. Applicability of the laboratory models to field conditions could not be established because of insufficient data.
Viability of Seeds
Author: Eric Hywel RobertsPublisher:
ISBN:
Category : Science
Languages : en
Pages : 470
Book Description
Storage environment and the control of viability, microflora and seed deterioration, effects of mechanical injuries on viability, effects of environment before harvesting on viability, effects of environment after sowing on viability, the measurement of viability, vigour, cytological, genetical, and metabolic changes associated with loss of viability, loss of viability and crop yields, dormancy: a factor affecting seed survial in the soil, control mechanisms in the resting seed, organisation of the United States National seed storage laboratory, organisation of the National seed storage laboratory for genetic resources in Japan, viability monographs, moisture content of seeds.
Author: