Meiotic maturation and progeny of oocytes from triploid Japanese pearl oysters (Pinctada fucata martensiO fertilized with spermatozoa from diploids
All materials above had 64 spores per sporangium, suggesting that these are sexual diploids
It has diploids
2n=12AL, tetraploids 2n=24AL, or hexaploids 2n=36AL.
In other oyster species, triploids grow faster than diploids
as a result of their partial sterility, their greater heterozygosity, their different energy allocations for growth and gametogenesis (Allen & Downing 1986, Hand & Nell 1999, Hawkins et al.
species revealed a variation in the size of the megaspore from 538 [+ or -] 23 [micro]m [I.
Tetrasomic genetic analyses differ from those of diploids
v], t, P) of the diploid
number of chromosomes were calculated using the well-known formulas.
At the final sampling before relocation to grow-out bags, triploid oysters were significantly larger than diploids
(P < 0.
A complementary method for production of tetraploid Crassostrea gigas using crosses between diploids
and tetraploids with cytochalasin b treatments.
They have crossed the orange-flesh diploids
into the tetraploid population and, beginning in January, will be intercrossing these tetraploid-diploid
DO YOU know your hybrids from your perennials, your diploids
or tetraploids, or what about timothy or clover?
Guayule is not only normally a tetraploid (although diploids
, polyhaploids, triploids and octaploids all spontaneously occur), but it is also a facultative apomictic producing a mixture of seed types depending upon environmental conditions (ref.