A karyomorphological study on two newly recorded taxa of Lycoris (Amaryllidaceae) in Anhui province, China

摘要

Two wild populations of L. houdyshelii and L. straminea were fi rst discovered in Anhui province and cytologically studied. The results showed that two kinds of cytology were found in L. houdyshelii, with one having the karyotype 2n = 31 = 3m + 13st + 10t + 5T, and the other having the karyotype 2n = 30 = 3m + 21st (SAT) + 3t (SAT) + 3T. The karyotypes and secondary constriction are reported for the fi rst time. The karyotype of L. straminea is formulated as 2n = 19 = 3m + 7st + 4t + 5T, which is similar to some previous reports and confi rmed here. The karyotypes of these two taxa are both of 3B type according to the degree of asymmetry and Stebbins’criteria. According to the gross fl oral morphology, phenology and karyotype of these two taxa, it is suggested that L. houdyshelii is probably a hybrid between a taxon with 2n = 6M + 10T, such as L. longtuba or L. chinensis and L. radiata var. pumila, and L. straminea putatively originates in hybridization between L. radiata var. pumila and L. chinensis.