The collected oysters were derived from different lines, families, and
ploidies (diploid, triploid, and tetraploid) cultivated by ABC within the Chesapeake Bay, USA (Table 1).
Student's t-test was used to test a statistical significant difference between means of growth and survival of
ploidies for the same month.
Srivalli and Khanna-Chopra (2004) believed that Pn is considerably influenced by source- sink relationships, which are different in wheat across
ploidies. Austin et al.
The pollination season also affects seed ploidy: pollinations occurring during the dry summer produce many hybrids with undesired
ploidies, such as hexaploids and heptaploids, while pollinations in cooler and more humid seasons have lower seed yield but a higher tetraploid recovery rate (SHEPHERD et al., 1994).
The lateral endostyle cells then slowed their rates of DNA replication, attaining final
ploidies of 194 [+ or -] 26 C (Fig.
In 15 accessions, the
ploidies differed between flow cytometry and root tip chromosome counts.
This contrasts with the marginal differences observed in growth between
ploidies at the temperate site, where triploids showed lower survival than diploids.
The ability to introgress germplasm across
ploidies, regardless of reproductive method (i.e., sexual vs apomictic) provides an additional dimension to breeding superior cultivars of Tripsacum, which had previously not been realized.
There were significant differences in shell height among sites as well as between
ploidies in both years (P < 0.05; Table 7), but no significant interactions were detected between site and ploidy in either year (P > 0.05).