apomict造句

• In contrast to the sexual diploids, the pairing of chromosomes at metaphase I in triploid apomicts is strongly reduced.
• The second group consists of polyploid ( mostly triploid ) apomicts, meaning that both a viable embryo as well as a functional endosperm is formed without prior fertilization.
• He said he believed this was how apomicts evolved during the ice age, when great movements of ice and earth brought together plants from different latitudes with different development times.
• "Taraxacum officinale L " . ( dandelion ) is a vigorous weed in Europe with diploid sexual populations in the southern regions and partially overlapping populations of diploid sexuals and triploid or tetraploid apomicts in the central and northern regions.
• As Jens Clausen put it The apomicts actually have discovered the effectiveness of mass production long before Mr Henry Ford applied it to the production of the automobile . . . . Facultative apomixis . . . does not prevent variation; rather, it multiplies certain varietal products.
• They describe a new genus Brachycaulos Dixit and Panigr . ( 1981 ), a new sub-genus, Geniculohirtistylis Panigr . and Purohit and 23 new species / varieties and 26'microspecies'; a large number of new combinations ( comb nov . ) and nomen nova ( nom . nov ) are made; they discuss several problems of intricate nomenclature, discuss the theoretical basis of recognising several taxonomic categories, concept of microspecies in obligate apomicts, and outline the distribution and evolutionary trends within the family, utilising the entire gamut of evidence from fossil history, cytology, anatomy and phytochemistry.