Al ocurrir la meiosis en la celula madre de la megaspora, de tetraploides se forman gametos 2n y debido a que junto a estas crecian diploides, entonces se esperaria la formacion de triploides
. Sin embargo, en la semilla de tetraploides no se encontraron plantas triploides
, lo cual indica que las celulas que forman sacos embrionarios en las plantas tetraploides de esta poblacion posiblemente no llevan a cabo la meiosis, o que se forman gametos no reducidos por nucleos de restitucion.
The Game and Wildlife Conservation Trust is currently examining the impact of releasing the triploid
trout into a number of rivers including the Honddu, in Mid-Wales - which has been described as a location for "perfect" trout fishing - and the Arrow, in Herefordshire.
The original bluebunch (PI 232132) x thickspike (PI 236663) cross resulted in several triploid
hybrids, from which the advanced generation breeding population was derived, designed to test the hypothesis that genetic introgression can occur between bluebunch and thickspike (Dewey, 1965).
Before substantial commercial introduction of triploid
Suminoe oysters into the Chesapeake Bay, any environmental hazards of reproduction associated with a range of management scenarios should be assessed.
32-35[degrees]S) (Nell, 2002) had slow growth rates and poor meat condition in their triploid
Pacific oysters in the 1990's.
Feng and Herbert (2006) concluded that 3PN embryos have 61.8% of triploid
chromosome complement, 25.2% of mosaic arrangements, and only 12.65 of them had a diploid chromosome (22).
This work describes an initial experimental investigation into early summer triploid
mortality in the Chesapeake Bay to better understand the timing, course, and potential causes of the oyster mortality.
The woman underwent amniocentesis which in primarily quantitative fluorescent polymerase chain reaction (QF-PCR), the patterns of the markers were consistent with a triploid
fetus and confirmed by the cultured amniocytes, revealing a karyotype of 69, XXX (Figure I).
(40,41) However, this marker has the limitation of not being able to discern PHMs from nonmolar specimens (the latter including both biparental diploid nonmolar specimens and digynic triploid
nonmolar specimens) because all of these entities maintain p57 expression due to the presence of a maternal chromosome complement.
pregnancies: genetic and clinical features of 158 cases.
1.5, 2.5) also termed "off ploidy" (Pavelka et al., 2010), presenting triploid
and pentaploid, chromosome plates, were also documented.
Diploid and triploid
Japanese oyster (total n = 21,000; 3,500 for each ploidy and site) were obtained from Centro de Reproduccion de Especies Marinas del Estado de Sonora (CREMES) O.P.D.