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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...
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 ...
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...
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...
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...
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 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...
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...
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...
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...
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...
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....
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...
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 ...
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...

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