Orchid triploid fertility rate
WebNov 1, 1998 · Abstract Polyploidy is widely acknowledged as a major mechanism of adaptation and speciation in plants. The stages in polyploid evolution include frequent fertility bottlenecks and infrequent events such as gametic nonreduction and interspecific hybridization, yet little is known about how these and other factors influence overall rates … http://images2.wikia.nocookie.net/orchids/en/images/2/28/Polyploidy_in_Phalaenopsis_Orchid_Improvement.pdf
Orchid triploid fertility rate
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WebBrief Look at Polyploidy. Paul Gripp. One of the main features of orchids as a hobby is the wide range of interest that makes it a challenging, intriguing, and ever-searching endeavor. The study of plant genetics in reference to orchids is one of these fascinating sidelines. … WebNov 1, 2001 · Offspring were diploid (94%) or triploid (6%) in 2x × 2x crosses, diploid (17.5%), triploid (56%) or tetraploid (26.5%) in 3x × 2x crosses, and triploid (53%) and tetraploid …
WebThe findings of this study provide information on the bio- logical characteristics of 3nRR and mechanisms associ- ated with fertility regulation in triploid fish. Results Fertility of autotriploid Carassius auratus 3nRR were generated by crossing female RCC and male 4nRR during the breeding season (Figs. 1a, b and c, 2 and 3a, b and c; Table 1). http://www.woodstreamorchids.com/phragbesshy3.html
WebDec 17, 2012 · A popular hypothesis to explain this phenomenon is that there are different slightly deleterious recessive homozygous alleles in the two parents and that these alleles … WebSPAWNING: Triploid grass carp are certified sterile by the U.S. Fish and Wildlife Service and will not reproduce. USE: Triploid grass carp have been stocked for decades as a natural …
WebFeb 12, 2013 · Importantly, the triploid hybrids differed in the level of high-parent heterosis relative to the derived triploid inbreds. Also, the differences observed between the reciprocal triploid hybrids correlated strongly with differences observed between the inbreds, either at the diploid or triploid level, in a manner explicable by genome dosage ...
WebRecent research on grass carp stocking rates indicates to achieve control a stocking rate of 4-6 fish per ton of aquatic plant biomass must be used. Pond owners should consult with … citibase newcastle cobaltWebAug 1, 2016 · Relative fertility among the triploids ranged from 0.00% to 33.63%. Of the 13 triploids used in this study, five accessions had a relative fertility of <2%. One accession, H2008-047-008, had no measurable female fertility. citibase manchester old traffordWebAug 1, 2016 · Relative female fertility was significantly reduced in triploids, but varied considerably among accessions and ranged from 0.0% to 33.6%. Of the 13 triploids used … diaper sites factoryWebNot all triploid plants are sterile, especially in orchids. Due to the enormous number of seed within a typical orchid seed capsule (e.g., 1 X 10 6) a 0.01 percent fertility can result in 10 … citibase officesWebJun 17, 2024 · The diploid, triploid, and tetraploid F 1 hybrids from 'TS1-3' × 'P163', 'TS1-3 (4x) ... The results indicated a reduction in fertility in the triploids and the tetraploids, relative to their diploid counterparts. When triploids were used as females, seed yields were less than 2% compared to when diploids were used as females; thus, triploids ... citibase bristol business parkWebWe performed an extensive experiment to compare male fertility, flowering period, seed set and germination rate between triploid and tetraploid cross-progeny of Dactylis glomerata L. originating from reciprocal diploid (2x) x tetraploid (4x) crosses. Four hundred and forty-five triploid and tetraploid individuals, constituting the citibase movie theaterWebFertility Rate. 55.9 (births per 1,000 women 15-44 years of age) Teen Birth Rate. 19.3 (births per 1,000 females 15-19 years of age) Infant Mortality Rate. 6.5 (infant deaths per 1,000 … citibase newcastle market street