Chromosome Behaviors in Meiotic of Pollen Mother Cells in Inter-subspecific Hybridization between Chinese Cabbage and Non-heading Chinese Cabbage
CHEN Longzheng
XU Hai
SONG Bo
FAN Xiaoxue
Abstract：Meiotic behaviors of pollen mother cells ( PMCs) in inter-subspecific hybrid F1 and BC1-3 be?tween Chinese cabbage and non-heading Chinese cabbage were studied. It was observed that 90.7%of F1 pollen were stainable, indicating good fertility. The fertility of BC1-3 was gradually increased. 89.1%chro?mosome behavior in F1 meiotic PMCs was regular which could explain the good fertility. Abnormal chro?mosome behaviors such as double nucleoli, disordered paring in Prophase I, chromosome bridge in meta?phase I, segments loss in anaphase I were discovered which could explain the lower fertility of F1 hybrid than normal diploid. 14.3% abnormal chromosome behaviors were found in BC1 generation however very limited in BC2-3 which indicated that it was a repaid process for chromosome behavior of backcross genera?tion becoming normal;this result was consistent to phenotype and fertility investigation.
Keywords：Chinese cabbageinter-subspecific hybridmeiosischromosome behaviors
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 421-424 )