1, The oocyte is effectively a tetraploid cell.

2, The result indicated that the tetraploid leaves of Viola tricolor are bigger and thicker and the color is more deep green. Its flower is more huge.

3, The tetraploid with the occurrence rates 2.5 % was observed in Angora goat.

4, They are complexpolyploids , being partly tetraploid and partly hexaploid.

5, Doubling of chromosomes improved the meiosis obviously, but tetraploid hybrid was still acarpous which may be related to the nucleo-cytoplasmic incompatibility.

6, The stoma characters of both tetraploid and diploid Anthuriums were comparatively investigated.

7, The root yield and sugar content of tetraploid lines were higher than that of diploid lines. However, the Cercospora leaf spot resistance had no significant differences.

8, Conclusion The tetraploid of saussurea involucrata kar. et Kir increases the content of flavones, has the value of development and utilization.

9, Homozygous tetraploid is a relatively balanced system,(http:///tetraploid.html) the continued selection is invalid.

10, Since the first tetraploid watermelon was obtained in 1939, polyploidy breeding has always been the focus of watermelon breeding.

11, Chromosome count showed that the plants, containing non tetraploid cells besides amphidiploid, were chimeras.

12, It is extraordinarily important to select tetraploid lines for breeding sugar beet polyploid varieties.

13, The high efficient transformation system of tetraploid black locust has been established.

14, A micro-propagation system for tetraploid black locust ( Robinia pseudoacacia ) was established by using its shoots.

15, In the tetraploid, pseudogamous species Rubus nitidioides, Haskall selected two plants . Haskall.

16, A cell containing four sets of chromosomes is said to be tetraploid.

17, The cross-compatibility between cultivated rice and 6 diploid and tetraploid wild rice species was studied by means of artificial pollination.

18, Due to the complexity of tetrasomic inheritance, most (five) genetic maps of M. sativa have been constructed in diploids, and three genetic maps have been constructed in tetraploid populations.

19, Under the same temperature, the electrolyte exosmosis rate and damage of cytomembrane of tetraploid plants were lower than diploid plants.

20, A wide range of ploidy variation occur to the complex, for example diploid, tetraploid, hexaploid, octoploid, and even dodecaploid.

21, If such gametophytes produce fertile gametes, the resulting sporophyte is then tetraploid, and large polyploid series may subsequently be developed. Apospory is found in some mosses and ferns.

22, In this paper, we discussed the effect of the super-cooling treatment at different embryo stages based on their rate of tetraploid induction and the sex ratio of triploid in the next generation.

23, The invention relates to a cultivation method of the tetraploid dendrobium officinale.

24, The identification results of cell ploidy in the material induced showed that most strains were mosaic with diploid and tetraploid cells at average levels of 79.4% and 20.6% respectively.

25, Under the same temperature, the electrolyte exosmosis rate of tetraploid plants were lower than diploid plants.

26, Here I use an experimental approach to test how polyploidy mediates ecological divergence in Achillea borealis (Asteraceae), a widespread tetraploid plant with localized hexaploid populations.

27, By comparing with other cytological data of Campanulaceae , this species is probably tetraploid and the genus Homocodon maybe close to Campanula and Adenophora in phylogeny .

28, The banding patterns of B genome of hexaploid wheats are basically same, but N-bands have definite differences among species of B genome of tetraploid wheats.

29, If such gametophytes produce fertile gametes , the resulting sporophyte is then tetraploid, and large polyploid series may subsequently be developed.

30, The main reason of sterile under the self-pollination is the abnormality of the meiosis of pollen mother cells in tetraploid and the abortion of all pollens.