Abstract:
Chromosome counting and chloroplast counting in guard cells were used in the ploidy determina-tion of the regenerated plants from unpollinated ovules of cucubita pepo.The results indicated the guard cell chloroplast numbers in haploid,diploid and tetraploid were (4.1510.37),(8.0510.76 ) and(16.OS士0.69) respectively;The ratio of them was approximately 1:2:4,which showed chloroplast counting was a reliable and practicable method in ploidy determination. In addition, the size of guard cell of haploid, diploid and tetraploid were ( 20.31士3.38 ) hem,(30.80土2.19)p.m, (41.78土1.03 ) p.m respectively,and the ratio of them was ap-proximately 1:1.5:2,which showed the method of counting the size of guard cell was also a practicable method in ploidy determination of regenerated plants that we can refer to.
Key words:
Cucurbita ,
Unpollinated ovules,
Regenerated plants,
Methods for ploidy determination
CLC Number:
GUO Yong-qiang, WANG Jian-she, ZHANG Hui-ling, WEN Cai-xiang, LI Hai-zhen, CAI Min-hua. Study on Methods for Ploidy DetermiNa+tion in Regenerated Plant from UnpolliNa+ted Ovules of Cucurbita pepo[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2004, 19(3): 80-83. doi: 10.3321/j.issn:1000-7091.2004.03.020.