Chromosome Counts of Carex Section Ovales
Chromosome Counts of Carex Section Ovales
复制标题
苔草节卵圆形染色体计数
DOI：
10.1086/337884
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发表时间：
1991
影响因子：
--
通讯作者：
R. Whitkus
中科院分区：
文献类型：
--
作者：
R. Whitkus
对8种苔草组卵形苔草(C.bebbii、C.Crawfordii、C.Integra、C.microptera、C.pachystachya、C.praticola、C.preslii和C.subfusca)进行了染色体计数。结合该教派以前的研究数据。在卵圆形中，染色体数目的变异在个体、种群和物种中都能观察到。10个同胞家系的计数表明，结构重排发生在世代之间。在该区段的大约70种物种中，总共有38种已经清点完毕。16个物种被不止一次计数：其中7个物种没有染色体数量变异，9个物种具有非整倍体数量序列。在切片中发现了两种形式的染色体变化：结构重排和非整倍体。目前，这些数据还不能用来确定是严格的非整倍体还是异倍体导致了非整倍体的变异。
Chromosome counts for eight species of Carex section Ovales were determined (C. bebbii, C. crawfordii, C. integra, C. microptera, C. pachystachya, C. praticola, C. preslii, and C. subfusca). Combined with data from previous studies in the sect. Ovales, chromosome number variability is observed within individuals, populations, and species. Counts from 10 sib families of C. pachystachya indicate that structural rearrangements occur between generations. A total of 38 of the approximately 70 species of the section have been counted. Sixteen species have been counted more than once: seven of these show no chromosome number variation, and nine have aneuploid series of numbers. Two forms of chromosome change are identified in the section: structural rearrangements and aneuploidy. At present the data cannot be used to determine whether strict aneuploidy or agmatoploidy accounts for the aneuploid variation.