Chromosome Segregation in Fertilized Eggs from Triploid Suminoe Oysters,Crassostrea ariakensis, following Inhibition of Polar Body 1
作者单位：Aquaculture Genetics & Breeding Technology CenterCollege of William and MaryVirginia Institute of Marine ScienceGloucester PointVirginia 23062USA Jr
会议名称：《中国动物学会、中国海洋湖沼学会贝类学分会第八次会员代表大会暨第十三次全国贝类学术讨论会》
会议日期：2007年
基 金：Natural Science Foundation of China(No.30471326) NSFC Qingdao Joint Fund(05-2-P-1) Shandong Outstanding Youth Scientist Fund(2005BS07002)
关 键 词：Crassostrea ariakensis meiosis united bipolar segregation tripolar segregation
摘 要：Chromosomes segregation in fertilized eggs from tdploid Suminoe oysters,Crassostrea ariakensis,following inhibition of the first polar body(PB1),was studied with acetic orcein staining *** from triploids were fertilized with sperm from *** block the release of PB1,fertilized eggs were treated with 0.5 mg/l of cytochalasin B(CB).The sequential events of meioses observed are *** typical patterns of chromosome segregation were identified,i.e.,tripolar segregation(57.3%),united bipolar segregation(8.7%)during the second meiosis of fertilized *** behavior of chromosomes in the remaining 34% of developing eggs seemed disorganized,but appeared to be variants of the *** asynchrony of meiosis was remarkable in developing *** was notable that only 18% of the total eggs in CB-treated groups resumed *** seemed clear thatunited bipolar segregationwould give rise to tetraploids.