http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
塊莖形成 Solanum屬 植物에서 四倍體 × 二倍體 交配에 依한 三倍體 및 四倍體의 生産
HEIYOUNG KIM(金惠英),에치. 티. 에릭슨(H. T. ERICKSON) 한국육종학회 1979 한국육종학회지 Vol.11 No.2
Tetraploids were crossed as female parent with various diploid clones iu tuber bearing Solanum species. The ploidy leveles of the progenies were determined by chromosome count and they were all triploids or tetraploids. The male diploid parent were grouped into two, one which produce 2n male gametes along with n gametes and the other which produce n male gametes mostly and very few 2n gametes if any. As female parents S. tuberosum and tetraploid S. chacoense produced abundant seeds when crossed to the diploids of the first type but very few seeds when crossed to the second type. A pentaploid endosperm with a triploid embryo seems to have competitive disadvantage to a hexaploid endosperm with a tetraploid embryo in these two species. S. stoloniferum and S. fendleri produced more seeds than S. tuberosum and S. chacoense with diploids of the second type. A pentaploid endosperm with a triploid embryo might develop better in S. stoloniferum and S. fendleri than in S. tuberosum and S. chacoense. Leaf index of triploid is similar with diploid and lower than tetraploid. The triploids had lower pollen stainability than diploids but had equal or higher stainability than the tetraploids. Pollen size of S. chacoense increased with an increase in ploidy level.
Heiyoung Kim(金惠英),Il Gin Mok(睦一振),Byung Hee Han(韓秉熙) 한국육종학회 1987 한국육종학회지 Vol.19 No.3
This work has been performed to select diploid potato clones which produce 2n gametes by sexual polyploidization. Diploid clones of S. tuberosum group Stenotomum and group phureja which have not being selected for 2n gametes were used as well as the selected 2n gamete producing diploid clones. The inter-crossed progenies of these clones were studied cytologically to select 2n pollen producing plants. The rate of 2n pollen production, selected by the pollen size and dyad formation at the tetrad stage, was higher in the progenies of FDR-FDR than in the progenies of FDR-diploid or diploid-diploid. Both of FDR by Asps gene and SDR by pc1pc1 and pc2pc2 were found as the mechanism of the dyad formation. Four clones were selected, because they were found to have psps-genes as well as synaptic mutant genes, sysy. Therefore, the parents of these clones were infered to be hetrozygotes for the synaptic mutant genes. Four clones out of 120 were selected as 2n egg producing diploids by 2x-4x crosses. These selected clones can be used to produce tetraploid progenies by 4x-2x or 2x-2x crosses.