CAJ | 학술논문

报道了Paeonia anomala L.的核型,澄清了新疆阿尔泰地区分布的该物种的染色体数目.分布于该地区的Paeonia anomala L.的核型组成:2n=2x=10=6m+2sm+2st.该类群核型与该属其它类群一致-2A型.在综合比较分析该属染色体参数以及核型不均一性参数,包括最长/最短染色体比(L1/Ln)和染色体不对称系数(CKOA)的基础上,我们发现该属三个组在核型上没有明显分化,仅在木本类群(Sect.Moutan DC.)和草本类群(Sect.Onaepia Lindley和Sect.Paeonia)之间存在微小差异.此外,作为二倍体类群,新疆阿尔泰地区分布的Paeonia anomala L.很可能是二倍体杂种,这将为研究被子植物的父母本同倍化杂交式物种起源提供一个很好的研究材料.
보도료Paeonia anomala L.적핵형,징청료신강아이태지구분포적해물충적염색체수목.분포우해지구적Paeonia anomala L.적핵형조성:2n=2x=10=6m+2sm+2st.해류군핵형여해속기타류군일치-2A형.재종합비교분석해속염색체삼수이급핵형불균일성삼수,포괄최장/최단염색체비(L1/Ln)화염색체불대칭계수(CKOA)적기출상,아문발현해속삼개조재핵형상몰유명현분화,부재목본류군(Sect.Moutan DC.)화초본류군(Sect.Onaepia Lindley화Sect.Paeonia)지간존재미소차이.차외,작위이배체류군,신강아이태지구분포적Paeonia anomala L.흔가능시이배체잡충,저장위연구피자식물적부모본동배화잡교식물충기원제공일개흔호적연구재료.
This is the first report of the chromosome karyotype of P. anomala from the Altai populations. The populations sampled from the Altai region of Xinjiang, China, are diploid (2n= 10), with the 2A type karyotype and the karyotypic formula of 2n= 2x= 10=6m+ 2sm+ 2st. Based on karyotypic and asymmetric parameters, i. e., mean arm ratio, rario of longest/shortest chromosomes (L1/Ln ), coefficient of karyotypic overall asymmetry (CKOA), it was found that there was no apparent differentiation in karyotype features among all the three sections of the genus Paeonia, although some slight karyotypie differences were found between the woody section (Sect. Moutan DC. ) and the herbaceous sections (Sect. Onaepia Lindley and Sect. Paeonia). The diploid status of the P. anomala populations, revealed in this study,implies that the species, assumed as interspecific hybridization origin, may add to the handful examples of homoploid hybrid speciation in angiosperms.