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Isolation of diploid and tetraploid cytotypes from mixoploids based on adventitious bud regeneration in Populus
Adventitious bud Colchicine Mixoploid Populus Tetraploid
2024/2/27
Somatic chromosome doubling usually results in the production of mixoploids, which are difficult to use in breeding programs. In this study, we developed a method to isolate diploid and tetraploid cyt...
Morphological variability between diploid and tetraploid taxa of the genus Betula L. in the Czech Republic
silver birch downy birch ploidy flow cytometry classification function
2018/3/6
The aim of this work was to suggest a reliable method for distinguishing between diploid and tetraploid taxa of the
genus Betula Linnaeus, based on leaf measurements. In total, 97 individuals from 6 ...
Micronucleus occurrence in diploid and triploid rainbow trout (Oncorhynchus mykiss Walbaum)
rainbow trout diploid triploid micronucleus
2015/1/27
The aim of the study was to observe the influence of different ploidy levels in fish on micronucleus occur璻ence. Twenty minutes after fertilization, one group of rainbow trout eggs was exposed to wate...
Deletion Mutations of the Self-incompatibility (S) Locus Induced by Gamma Irradiation in a Wild Diploid Species of Sweet Potato, Ipomoea trifida
Convolvulaceae S gene sporophytic self-incompatibility
2010/10/25
Gamma irradiation was used to induce mutations affecting self-incompatibility (SI) in diploid Ipomoea trifida. Plants (S1 homozygote) with developing flower buds were exposed with gamma rays of 10 and...
Bud Pollination for Production of Diploid Seedless Watermelon Using Partially Inactivated Pollen
empty seed laborsaving parthenocarpy soft X-ray irradiated pollen stored pollen
2010/11/24
Diploid seedless watermelons are presently produced by pollination with partially inactivated (soft X-ray irradiated) pollen. Bud pollination on the day preceding flowering was tested as a means of re...
New Method of Producing Diploid Seedless Watermelon Fruit
Citrullus lanatus embryo parthenocarpy pollination X-ray
2009/9/10
We found that diploid seedless watermelon can be produced by pollination with partially functional pollen which was irradiated with soft X-rays at the doses of 800 to 1000 Gy. The diploid seedless fru...
The Effect of Temperature and Daylength on Heading in Diploid Rhodesgrass Cultivars
days to heading flower initiation photoperiod sensitivity
2009/9/9
The present study was conducted to clarify the effect of temperature and daylength on heading in diploid rhodesgrass cultivars. Three diploid cultivars, Tochiraku-kei, Fords-Katambora and Pioneer, wer...
Survey of Diploid in Butterbur (Petasites japonicus Maxim.)and Production of Hybrid Plants for Harvesting Spikes by Crossing
Hybrid Plants Harvesting Spikes Crossing
2009/7/13
Butterbur is an important vegetable in Japan. In this paper, we present the results of surveying for diploids among cultivated butterbur and production of hybrid plants for harvesting spikes by crossi...
Differences of Morphological and Fruit Bearing Characteristics among the Different Ploidy Plants and Triploid Production by Crossings between Diploid and Triploid Plants in Loquat
fructification polyploidy breeding pollen germination ratio reciprocal crossing
2009/7/10
To facilitate efficient breeding of triploid loquats (Eriobotrya japonica Lindle.) by crossing diploid loquats with tetraploid loquats, we investigated differences of morphological and fruit bearing c...
Production of Triploids and Breeding Seedless Cultivar ‘Tokushima 3X No.1’ from Tetraploid × Diploid Crosses in Sudachi (Citrus sudachi Shirai)
Tetraploid Diploid Production
2009/7/10
To obtain the seedless sudachi of a triploid, 297 flowers were crossed between tetraploid sudachi and diploid sudachi, and 50 triploids were established in 1992. Flowcytometer was used for selection o...
Comparison of the Establishment Efficiency of Well-grown Seedlings at the Early Growth Stage from Reciprocal Crosses between Diploid and Triploid Apple Cultivars,and the Possibility of These Cultivars Cross Breeding
fruit set pollen parent seed formation tree height viability
2009/7/8
This study investigated the possibility of performing cross breeding between diploid (2x) and triploid (3x) apple cultivars. Well-grown king flowers of 2x were hand-pollinated with an abundance of pol...
Production of Hybrid Plants by Crossings between Triploid and Diploid Japanese Butterbur Cultivars and Their Characteristics
Aichiwasebuki Mizubuki ploidy level
2009/7/6
Crossings between triploid and diploid in cultivated Japanese butterbur (Petasites japonicus Fr. Schmidt) were made and the agronomic traits of hybrid plants for harvesting petioles were investigated....
The Influence of Phosphate Treatment on Chromosome Segregations and Tetrad Regularity and Using Tetrads in Determination of Regular Meiosis Diploid and Autotetraploid Meadow Fescue（Festuca pratensis Huds）
Phosphate Treatment Chromosome Segregations Tetrad Regularity Regular Meiosis Diploid
2009/1/23
This study was carried out under greenhouse conditions in 1994-1995. The influence of phosphate treatments (0, 1, 2, 3 and 4g P 2 O 5 /pot) on chromosome segregaiton at the first anaphase (AI) and tet...
The Effects of Phosphate Treatments on Chromosome Pairing in Diploid and Autotetraploid Meadow Fescue（Festuca pratensisHuds）
Phosphate Treatments Chromosome Pairing Diploid Autotetraploid Meadow Fescue
2009/1/23
This study was carried out under greenhouse conditions in 1994-1995. The influence of phosphate treatments (0, 1, 2, 3 and 4g P 2 O 5 /pot) on meiotic chromosome pairing and the number of arms bound ...
The Effect of Cuting Frequency and Height on The Hay Yield and Some Chemical Characteristics of Hay in Diploid and Tetraploid Perennial Rye（Secale montanum Guss）
Cuting Frequency Height Hay Yield Chemical Characteristics Diploid Tetraploid Perennial Rye
2009/1/15
This study was carried out under greenhouse conditions from March 1995 to August 1996. The effects of cutting frequency and height on hay yield and quality were investigated. In this research, 2 ploi...