Karyotypes of the Genus Fritillaria from South Anhui

This paper reports chromosome numbers and karyotypes of five species of the genus Fritillaria from south Anhui. The origin of the material used in this work is provided in Table 1, micrographs of mitotic metaphase in Plate 1,2, and the parameters of chromosomes in Table 2. Except F. thunbergii Miq., the karyotypes and chromosome numbers of all the species in this paper were studied for the first time. The results are shown as follows: 1. Fritillaria qimenensis D. C. Zhang et J. Z. Shao Collected from Qimen, Anhui, it has the karyotype formula 2n = 24+4Bs = 3m+lsm+8st (2sc)+12t (2sc)+4Bs (Plate 1:1, 2). The chromosomes range in length 8.72-19.13μm, with the ratio of the longest to the shortest 2.19. Therefore, the karyotype belongs to Stebbins’ (1971) 3B. The secondary constrictions are found on the long arms of 7th and 10th pairs. All the five B-chromosomes are of terminal centromeres. The two chromosomes of the second pair show heteromorphy (Fig. 1, E) with arm ratios 1.86 and 1.56 respectively. 2. Fritillaria monantha Miq. var. tonglingensis S. C. Chen et S. F. Yin Collected from Tongling, Anhui, this species is shown to have three chromosome numbers, 2n =24+5Bs, 2n=24+2Bs and 2n=24. This paper reports 2 cytotypes: Type I: 2n = 24+5Bs = 4m+8st (2sc) +12t (2sc) +5Bs (Plate 1: 3, 4). The chromosomes range in length from 10.40 to 22.19μm, with the ratio of the longest to the shortest 2.13. It belongs to 3B of stebbins’(1971) karyotypic symmetry. The secondary constrictions are found on the short arms of 7th and the long arms of 9th chromosome pairs. The metacentric B-chromosomes and the small satellites located on the short arms are major characters of this cytotype. Type II: 2n=24=2m+2sm+8st(2sc)+12t(2sc) (Plate 1:5, 6). The chromosomes range in length from 13.84 to 29.81μm, with the ratio of the longest to the shortest 2.15. The karyotype belongs to Stebbins’3B. The secondary constrictions are found on the long arms of 5th and 10th pairs. No B-chromosomes are found. 3. Fritillaria xiaobeimu Y. K. Yang, J. Z. Shao et M. M. Fang Collected from Ningguo, Anhui, it has karyotype formula 2n = 24 = 2m+2sm+10st (4sc) + 10t (Plate 2:7, 8). The chromosomes range in length from 13.86 to 26.27μm, with the ratio of the longest to the shortest 1.89. The karyotype belongs to stebbins’3A. The secondary constrictions are found on the long arms of 7th and 9th pairs. 4. Fritillaria ningguoensis S. C. Chen et S. F. Yin Collected from Ningguo, Anhui, it is of karyotype formula 2n = 24 = 2m+2sm+8st (2sc) +12t (Plate 2: 9, 10). The chromosomes range in length from 9.11 to 23.23μm, with the ratio of the longest to the shortest 2.55. The karyotype belongs to Stebbins’3B. The secondary constrictions are only found on the long arms of the 10 th pair. 5. Fritillaria thunbergii Miq. Collected from Ningguo, Anhui, it is of karyotype formula 2n = 24 = 2m+2sm+8st(2sc) +12t(2sc)(Plate 2:11, 12). The chromosomes range in length from 8.83 to 19.85μm, with the ratio of the longest to the shortest 2.25. The karyotype belongs to stebbins’3B. There are secondary constrictions on the long arms of 5th and 7th pairs. The karyotype of the Ningguo material is similar to that of the Huoqiu (Anhui) material reported by Xu Jin-lin et al. (1987), but it is obviously different from 2n=2m(sc)+2sm+4st(2sc)+16t (2sc) reported byZhai et al. (1985) for the material from Xingjiang, Northwest China.     

A Comparative Karyotypic Study of Three Species in Fritillaria

The present paper deals with a comparative karyotypic study of three species in Fritillaria-F. thuncergii Miq., F. anhuiensis S. . Chen et S. F. Yin and F. hupehensis Hsiao et K. C. Hsia. The karyotype of F. anhuiensis S. C. Chen et S. F. Yin is first reported. The karyotypes of the three species of Fritillaria are rather similar, all with K(2n)=24= 2m+2sm+12t+4st+4m (SAT), showing a close interspecific relationship. They all have two pairs of st chromosomes, one of which is the third chromosome in all the three species studied, but the other is the seventh in F. thunbergii Miq, the eighth in F. anhuiensis S. C. Chen et S. F. Yin, and the fifth in F. hupehensis Hsiao et K. C. Hsia. It tells us that there are some differences in their karyotypes. All of the three species possess two pairs of satellite chromosomes with the satellites located on the long arms. A heterochromatic zone is found sometimes on long arms of No. IX chromosome in each species of Fritillaria and on one of No. I chromosomes in both F. thunbergii Miq. and F. anhuiensis S. C. Chen et S. F. Yin, a chromosome polymorphism occurring between populations of Fritillaria. In addition, three B chromosomes are always found in most root-tip cells of F. hupehensis Hsiao et K. C. Hsiao.     

A Karyological Study on Fritillaria from Xinjiang

Fritillary is a precious Chinese medicinal herb. Those native to Xinjiang Northwest China, are even more distinguished from other sources for their purity and effectiveness. Fritillaria in Xinjiang comprises 8 native species and one (F. thunbergii Miq.) introduced from Zhejiang, East China. In this paper the authors describe the karyotypes of 6 species native to Xinjiang and F. thunbergii Miq., of which five, i.e.F. olgae Vved., F. walujewii Regel, F. yuminensis X. Z. Duan, F. karelinii (Fisch.) Baker and F. thunbergii Miq. were studied for the first time. Detail observation and measurment of chromosomes in each of them were made. The data obtained may be summarized as follows: scietific name karyotype formula (2n=) F. pallidiflora Schrenk 2m + 2sm + 6st + 14t F. olgae Vved. 4m + 6st + 14t F. walujewii Regel 2m + 2sm + 8st+ 12t F. yuminensis X. Z. Duan 4m + 8st + 12t F. verticillata Willd 4m + 8st + 12t F. karelinii (Fisch.) Baker 4m + 4sm + 4st + 12t F. thunbergii Miq. 2m + 2sm + 4st + 16t The karyotype of the native species are, on the whole, similar to each other except that of F. karelinii (Fisch.) Baker, a species inhabiting desert areas. The number of m-sm chromosomes has increased from 2 to 4 and the number of st-t chromosomes decreased correspondently. So is the karyotype of F. thunbergii Miq. which is noted for its high ratio of long chromosome/short chromosome and the more t-chromosomes. These two peculiar karyotypes coincide amazingly with their specific natural habitats.     

黄精属的细胞分类学研究——Ⅱ.8个种的核型和进化

作者研究了中国产黄精属8个种的核型,结果如下:热河黄精,2n=22=14m(4SAT)+2sm(SAT)+6st;多花黄精,2n=22=8m+8sm(2sc)+6st(2sc);玉竹,2n=20=12m+8sm;小玉竹,2n=20=8m(2sc)+8sm+4st;长梗黄精,2n=16(18)=10m+4sm+2st;二苞黄精,2n=18=8m+10sm;黄精,2n=24=4m+8sm(2sc)+12st(2sc);卷叶黄精,2n=20=12m(2sc)+8sm。作者推测该属的染色体基数x=10。染色体数目进化的趋势是:非整倍性变异为主,整倍性变异为次;上升性变异为主,下降性变异为次。按照核型不对称程度,8个种的核型可分为三个等级。核型由对称向不对称进化是与染色体数目的进化趋势大体上相关的。     

黄精属的细胞分类学研究Ⅰ.8个种的核型和进化

作者研究了中国产黄精属8个种的核型,结果如下:热河黄精,2n=22=14m(4SAT)+2sm(SAT)+6st;多花黄精,2n=22=8m+8sm(2sc)+6st(2sc);玉竹,2n=20=12m+8sm;小玉竹,2n=20=8m(2sc)+8sm+4st;长梗黄精,2n=16(18)=10m+4sm+2st;二苞黄精,2n=18=8m+10sm;黄精,2n=24=4m+8sm(2sc)+12st(2sc);卷叶黄精,2n=20=12m(2sc)+8sm。作者推测该属的染色体基数x=10。染色体数目进化的趋势是:非整倍性变异为主,整倍性变异为次;上升性变异为主,下降性变异为次。按照核型不对称程度,8个种的核型可分为三个等级。核型由对称向不对称进化是与染色体数目的进化趋势大体上相关的。     

4种(变种)辣椒的核型研究

本文研究了辣椒属4种(变种)的核型,各个种的核型可简式为小米辣2n=24=23m+1sm:簇生辣2n=24=20m+2sm+2st:樱桃辣2n=24=20m+4sm(2SAT):“印度辣”2n=24=22m+2st。按照Stebbins的核型分类,小米辣为2A型;簇生辣和樱桃辣为2A型,印度辣为2B型。     

安徽黄精属的细胞分类学研究

本文首次报道黄精属ＰｏｌｙｇｏｎａｔｕｍＭｉｌｌ我国三种特有植物的染色体数目和核型,结果如下：安徽黄精Ｐ．ａｎｈｕｉｅｎｓｅ发现两个细胞型：（１）２ｎ＝２４＝４ｍ＋６ｓｍ＋１４ｓｔ;（２）２ｎ＝２０＝４ｍ十６ｓｍ＋１０ｓｔ;　　黄精Ｐ．ｌａｎｇｙａｅｎｓｙ２ｎ＝１８＝６ｍ＋８ｓｍ＋４ｔ;距药黄精Ｐ．ｆｒａｎｃｈｅｔｉｉ有三个细胞型：（１）２ｎ＝２２＝８ｍ＋８ｓｍ（２ｓｃ）＋６ｓｔ;（２）２ｎ＝２０＝２ｍ＋１４ｓｍ＋４ｓｔ;（３）２ｎ＝１８＝４ｍ＋８ｓｍ＋４ｓｔ＋２Ｔ,全部属３Ｂ核型。黄精属植物安徽共有１０种,本文对９种黄精的染色体数目、核型进行了比较研究,发现它们可划分成三个类群,与中国植物志（第十五卷）的形态分类基本相符。     

Karyotype Analysis of 5 Species of Polygonatum Mill.

The present paper reports the chromosome numbers and karyotypes of five species in Polygonatum from Anhui of China. The materials used in this work are listed in Table 1, Photomicrographs of somatic metaphase and karyograms of the five species of Polygonatum in Plate 1, 2, 3, the idiograms in Fig. 1-11 and a comparison of the karyotype of them is provided in Table 2. The results are shown as follows: 1. Polygonatum odoratum (Mill.)Druce Two materials were examined. One from Mt. Huangshan, Anhui, has 2n= 16 = 10m (3sc)+ 6sm (Plate 1 :A, B). The idiogram is shown in Fig. 1. The chromosomes range in length from 2.85 to 8.85 μm, with the total length 48.63μm and the ratio of the longest to the shortest 3.11, The karyotype belong to Stebbins’(1971) 2B. The two chromosomes of the first pair have arm ratios 1.01 and 1.29 respectively, and The first pair has one chromosome carrying a satellite attached to the short arm, showing heterozyosity .The chromosome num ber of 2n= 16 in P. odoratum and its karyotype are reported for the first time. The other from Langyashan, Chu - xian, Anhui, is found to have 2n = 18 = 10m (Isc)+2sm+6st(2sc) (Plate 1: C, D). The idiogram is shown in Fig. 2. The chromosomes range in length from 2.43 to 8.29μm, with the total length 46.67µm and the ratio of the longest to the shortest 3.41. The karyotype is also of 2B. In a somatic chromosome complement the 2nd pair have one chromosome carrying a satellite attached to the long arm, showing heterozygosity. 2. Polygonatum filipes Merr. Two materials were examined. One from the Huangshan, Anhui is found to have two cytotypes: 2n= 16 and 2n=22. This paper reports one of them. The karyotype formula is 2n=22=8m+8sm(2sc)+6st(Plate 3: Q, R). The idiogram is shown in Fig. 3. The chromosomes range in length from 2.55- 5.85μm, with the total length 45.01 μm and the ratio of the longest to the shortest 2.29. The karyotype belongs to 3B. The other material from the Fangchang, Anhui, is shown to have four cytitypes: 2n= 14, 2n= 16, 2n=20 (Plate 3: W) and 2n=22. This paper reports two of them. Type I: the karytype formula is 2n=14=10m+4sm (Plate 3: S, T). The idiogram is shown in Fig. 5. The chromosomes range in length from 2.59 to 7.61μm, the total length 37.44μm and the ratio of the longest to the shortest is 2.94. the karyotype belongs to 2B. Type II :The karyotype formula is 2n=16=8m+4sm+4st (Plate 3: U, V). The idiogram is shown in Fig. 4. The chromosomes range in length from 2.65 to 8.21 μm, the total length 46.01 μm and the ratio of the longest to the shortest 3.10. The karyotype belongs to 2B. The chromosome numbers of 2n=20, 2n= 14 and 2n=22, and karyotype of 2n= 14 and 2n=22 in P. filipes are reported for the first time. 3. Polygonatum cytonema Hua Two materials were examined. One from the Langyashan, Chuxian, anhui, is found to have 2n = 18 = 8m (2sc)+ 6sm+ 4st (Plate 2: K, L). The idiogram is shown in Fig. 7. The chromosomes range in length from 3.41 to 9.21 μm, the total length 56.34μm and the ratio of the longest to the shortest is 2.70. The karyotype belongs to 2B. The other material from the Huangshan, Anhui, has two cytotypes: 2n=20 and 2n= 22. Type I: The karyotype formula is 2n= 20= 8m+ 6sm+ 6st (Plate 2: M, N). The idiogram is shown in Fig. 8. The chromosomes range in length from 1.75 to 5.03μm, with the total length 32. 91μm and the ratio of the longest to the shortest 2. 87. The karyotype is also of 2B. Type II: The karyotype formula is 2n=22=6m+ 8sm+4st+ 4t (Plate 2: O, P ). The idiogram is Shown in Fig. 10. The chromosomes range in length from 1.75 to 4.95 μm, with total length 35.05μm and the ratio of the longest to the shortest 2.83. The karyotype brlongs to 3B. 4. Polygonatum desoulayi kom. The material from Xuancheng, Anhui, is found to have karyotype 2n = 22 = 10m (2sc) + 6sm (lsc) + 6st ( Plate 2. I, J). The idiogram is shown in Fig. 6. The chromosomes range in length from 1.86 to 5.61μm, with the total length 41.98μm and the ratio of the longest to the shortest 3.02. The karyotype is also of 3B. The first pair has one chromosome carrying a satellite attached to the long arm, showing heterozygosity. The chromosome number and karyotype of Chinese material are reported for the first time. 5. Polygonatum verticillatum (L.) All. The material from the Langyashan, Chuxian, Anhui is found to have two cytotypes. Type 1: the karyotype formula is 2n = 18 = 2m+ 2sm+ 10st+ 2t+ 2T (Plate 1: G, H). The idiogram is shown in Fig.9. The chromosomes range in length from 1.86 to 4.03μm, with total length 28.28μm and the ratio of the longest to the shortest 2.17. The karyotype classification belongs to 3B. Type II: The karyotype formula is 2n=24=6m+4sm+12st+2T (Plate 1: E, F). The idiogram is shown in Fig. II. The chromosomes range in length from 2.01 to 5.03μm, with total length 41.36μm and the ratio of longest to shortest 2.50. The karyotype is also of 3B. The chromosome numbers and karyotypes of Chinese material are reported for the first time.     

百合属4种植物的核型研究

采用常规压片法对4种百合属植物野百合(L.brow n ii F.E.B row n ex M ie llez.)、兰州百合(L.d av id iiDuchartre var.un icolor(Hoog.)Co Hon.)、川百合(L.d av id ii Duchartre)、湖北百合(L.henry i B aker)进行了核型研究.结果表明,4种百合的染色体数目均为2n=24,核型除川百合为3A外,其余3种均为3B型.核型公式分别为:野百合2n(2x)=24=4m(2SAT) 2sm(2SAT) 4st 14t,兰州百合2n(2x)=24=2m(2SAT) 2sm 10st(2SAT) 8t 2T,川百合2n(2x)=24=2m(2SAT) 2sm 12st(3SAT) 8t,湖北百合2n(2x)=24=4m 18st 2t,其中湖北百合染色体核型为首次报道.通过比较发现,兰州百合与川百合的核型最为相似,亲缘关系相近;核型不对称性为兰州百合>川百合>野百合>湖北百合,以湖北百合的核型较为原始.     

Cytological Studies of the Genus Nomocharis and Its Related Genera

The somatic cells of 12 taxa of the genera Nomocharis, Lilium, Fritillaria and Cardiocrinum from north-western Yunnan were karyomorphologically studied. The 12 taxa are similar to each other in chromosomal morphology at the resting nucleus stage, which belongs to the complex chromocenter type. They are also similar to each other in morphology of mitotic prophase chromosomes, which belongs to the interstitial type. Their chromosome numbers are all 2n = 24, and centromeric terminalization values range from 79.9- 82.2%. The above results show that the four genera have close relationships. These 12 taxa, however, exhibit some similarities and differences in the position of secondary constrictions seemingly showing the karyological characters of each genus in the area. Firstly, on m(sm)-chromosomes, secondary constrictions close to centromeres appear stable in one of pairs in both Nomocharis( 6 taxa) and Lilium (4 taxa); In Cardiocrinum giganteum, they were found distant from centromeres on short arms in one of pairs; None was observed in Fritillaria cirrhosa. Secondly, on st (t)- chromosomes, remarkable secondary constrictions were generally found on long arms in Nomocharis, C. giganteum, F. cirrhosa and the high mountain habitants of Lilium, such as L. souliei, while they were always observed on short arms in L. nepalense, L. taliense and L. brownii, which grow in the lower altitude region. So the Nomocharis and high mountain members of Lilium have similary distribution of secondary constrictions, and theyare considered to be most closely related.     

杨属派间核型比较研究

对杨属五派代表种的核型进行了分析,各代表种核型公式如下:欧洲山杨(白杨派)2n=2x=38=21m(2SAT)+4sm+13st(1SAT);小叶杨(青杨派)2n=2x=38=1M+26m(1SAT)+8sm(1SAT)+1st+2t(1SAT);大叶杨(大叶杨派)2n=2x=38=2M+22m+8sm+6st;胡杨(胡杨派)2n=2x=38=2M+23m+3sm+10st(2SAT);箭杆杨(黑杨派)2n=2x=38=3M+29m(2SAT)+5sm+1st。杨属派间核型差异主要表现在中部与次中部着丝点(M,m)和近端部与端部着丝点(st,t)染色体数目上。白杨派和胡杨派具较多的st、t染色体,核型不对称系数比其它派高。按Stebbins理论白杨派和胡杨派属进化类型。     

国产毛茛属三种植物的核型研究

对国产三种毛茛属 (Ranunclus)植物进行了核型研究 ,其中昆明毛茛 (RanunculuskunmingensisW .T .Wang)染色体数目 2n=1 4及核型 2n =1 4 =6m +4sm +4st为首次报道 ;匍枝毛茛 (R .repenceL .)核型公式为 2n =4x =3 2 =8m +1 2sm +1 0st+2t,它是由两个不同的染色体组组成 ;刺果毛茛 (R .muricatusL .)核型公式为 2n=8x=64=1 0m +2 2sm +2 8st+4t,它也是由两个不同的染色体组组成     

湖南6种毛莨科植物的核型研究

本文对产于湖南的６种毛莨科植物的染色体进行了研究。裂叶星果草［Ａｓｔｅｒｏｐｙｒｕｍｃａｖａｌｅｒｉｅｉ（Ｌｅｖｌ．ｅｔＶａｎｔ）Ｄｒｕｍｍ．ｅｔＨｕｔｃｈ．）的染色体属于Ｒ型,核型公式为２ｎ＝１６＝１２ｍ＋２ｓｍ＋２ｔ,核型类型属于ＺＢ;打破碗花花（ＡｎｅｍｏｎｅｈｕｐｅｈｎｓｉｓＬｅｍ．）的核型公式为２ｎ＝１６＝１０ｍ＋４ｓｔ＋２ｔ（２ｓａｔ）,核型类型属于２Ａ;粗齿铁线莲［Ｃｌｅｍａｔｉｓａｐｉｉｆｏｌｉａｖａｒ．ａｒｇｅｎｔｉｌｕｃｉｄａ（Ｌｅｖｌ．ｅｔＶａｎｔ）Ｗ．Ｔ．Ｗａｎｇ］的核型公式为２ｎ＝１６＝１０ｍ＋２ｓｔ＋４ｔ（２ｓａｔ）或２ｎ＝１６＝１０ｍ＋２ｓｔ＋４ｔ（４ｓａｔ）随体染色体数目在居群之间有变化,核型类型属于２Ａ;扬子铁线莲［Ｃｌｅｍａｔｉｓｇａｎｉｐｉｎｉａｎａ（Ｌｅｖｌ．ｅｔＶａｎｔ）Ｔａｍｕｒａ］的核型公式为２ｎ＝１６＝１０ｍ＋２ｓｔ＋４ｔ（４ｓａｔ）,核型类型属于２Ｂ;毛莨（ＲａｎｕｎｃｕｌｕｓｃａｎｔｏｎｉｅｎｓｉｓＤＣ．）的核型公式为２ｎ＝１６＝６ｍ＋４ｓｔ＋６ｓｔ（２ｓａｔ）,核型类型属于３Ａ;毛莨（ＲａｎｕｎｃｕｌｕｓｊａｐｏｎｉｃｕｓＴｈｕｎｂ．）的核型公式为２ｎ＝?     

东北地区野豌豆属VICIAL．物种生物学研究Ⅶ．歪头菜及其近缘种核型分析

本文报道了歪头菜Ｖ．ｕｎｉｊｕｇａＡ．Ｂｒ．及其近缘种Ｖ．ｂｉｆｏｌｉａＮａｋａｉ的核型。歪头菜Ｖ．ｕｎｉｊｕｇａＡ．Ｂｒ．Ｚｎ＝２４＝８ｍ（４ＳＡＴ）＋１２ｓｍ＋４ｓｔ和２ｎ＝１２＝２ｍ（２ＳＡＴ）＋８ｓｍ＋２ｓｔ．ＲｂｉｆｏｌｉａＮａｂａｉ;２ｎ＝１２＝４ｍ（２ＳＡＴ）＋６ｓｍ＋２ｓｔ．核型分析表明四倍体细胞型是一个同源多倍体。二倍体四倍体细胞型分布式样表明二倍体细胞型占据着较为偏北的区域。根据核型一致性,我们认为将Ｖ．ｂｉｆｏｌｉａ仍处理为歪头菜的变种ｖａｒ．ｂｒａｃｔｅａｔａ更为合适。     

甘肃萱草属植物的核型研究

本文研究了甘肃萱草属6种、1变种的染色体核型;黄花菜K(2n)=22=12m+10sm(2SAT);小黄花菜K(2n)=22=10m+12sm;北萱草K(2n)=22=8m+14sm;北黄花菜K(2n)=22=14m+6sm+2st;萱草K(2n)=22=12m+8sm+2st;重瓣萱草K(2n)=33=18m+12sm+3st:折叶萱草K(2n)=22=10m+10sm+2st。以上核型可自然地分成两大类群,第一类群包括小黄花菜、北萱草、黄花菜;第二类群包括折叶萱草、萱草、重瓣萱草、北黄花菜。     

Karyotype Comparison of Populus SectTacamahaca

The paper identified and compared the karyotypes of 10 species(varieties) of Populus sectTacamhaca.The results were as follows:Ppseudo simonii Kitag.2n=38=27m+6sm(1SAT)+4st(2SAT)+1t(1SAT);Ptrichocarpa Torr.2n=38=2M+18m(1SAT)+8sm+10st(1SAT);Pcathayana Rehd.var.Beijing 2n=38=1M+24m+6sm+7st(2SAT);Pבpopularis’ 2n=38=3M+27m+2sm(1SAT)+4st(2SAT)+2t(1SAT);Pcathayana Rehd.var.Wutai 2n=38=5M+22m+4sm+5st+2t(2SAT);Pcathayana Rehd.var.Gansulinxiaman 2n=38=2M+28m+1sm+7st(1SAT);Pcathayana Rehd.var.Qinghai 2n=38=1M+27m+3sm+6st(3SAT)+1t(1SAT);Pcathayana×Zhongqing 10 2n=38=1M+26m+4sm+5st(2SAT)+2t(2SAT);Pcathayana×Zhongqing 48 2n=38=16m+10sm(1SAT)+10st(2SAT)+2t(1SAT).The results showed definite karyotype differences among the species of Tacamhaca.The karyotypes of most species(varieties) are made of m and sm and a few with st and t chromosomes.The karyotypes of Tacamhaca were all of 2B type of Stebbins.This study provided important basic data for taxon of Populus.     

A Cytological Study of Fifteen Species in Six Genera of Liliaceae from Yunnan

Fifteen species in six genera of the family Liliaceae were karyomorphologically studied. They share the complex chromocenter type of the resting nuclei and the interstitial type of the prophase chromosomes in somatic cells except that Clintonia udensis Trautv. et Mey is of the densely diffuse type and gradient type respectively. Their karyotype formulas are listed as follows: Clintonia udensis Trautv. et Mey, 2n= 14=8m+4sm+2st (2SAT), belongs to 2A type; Smilacina henryi (Baker) Wang et Tang, 2n=36=12m+16sm+6st+2t (2SAT), 2C type; Smilacina fusca Wall., 2n = 36= 14m (2SAT) + 12sm+ 10st(2SAT), 2B type; Smilacinata tsienensis (Franch.) Wang et Tang, 2n= 36=22m +2sm+ 2st(2SAT), 2C type; Smilacina atropurpurea ( Franch.) Wang et Tang, 2n=36=18m+6sm(2SAT) +12st, 2C type: Polygonatum kingianum Coll, et Hesml., 2n=30= 12m(2SAT) +6sm+ lst+2t, 2C type; Polygonatum cirrhifolium (Wall.) Royal, 2n=30= 10m+4sm+ 12st+4t, 3C type; Polygonatum curvistylum Hua, 2n=78=24m (2SAT)+ 14sm (6SAT)+40st, 3C type; Polygonatum cathcartii Baker, 2n = 32 = 12m + 6sm + 10st+ 2t + 2Bs, 2C type; Lilium henricii Franch., 2n = 24 = 2m(2SAT) + 2sm + 10st+ 10t, 3A type; Lilium bakerianum Coll. et Hesml. var. rubrum Stearn, 2n=24=4m ( 2SAT) +10st+ 10t (2SAT), 3A type; Nomocharis bilouensis Liang, 2n= 24= 2m (2SAT) +2sm+ 12st+ 8t, 3A type; Nomocharis pardanthina Franch., 2n= 24=4m (2SAT)+12st (2SAT)+ 8t, 3A type; Nomocharis sauluensis Balf. f., 2n=24=4m(2SAT) +10st (2SAT) + 10t, 3B type; Notholirion campanulatum Cotton et Stearn 2n = 24 = 2m (2SAT) + 2sm + 14st(2SAT ) + 6t, 3A type.     

风毛菊属6种植物的核型分析

采用常规压片技术对分布于横断山区菊科(Compositae)风毛菊属(Saussurea DC.)的6种植物进行染色体数目和核型分析。结果表明:尖苞雪莲（S.polycolea var.acutisquama）核型公式为:2n=2x=32=20m+12sm,属2B型;球花雪莲核（S.globosa）型公式为:2n=2x=34=16m+18sm,属2B型;重齿风毛菊(S.katochaete)核型公式为:2n=2x=32=8m+18sm+6st,属3B型;柱茎风毛菊(S.columnaris)核型公式为:2n=2x=32=24m+8sm,属2B型;禾叶风毛菊(S.graminea)核型公式为:2n=2x=28=8m+18sm+2st,属3B型;长毛风毛菊(S.hieracioides)核型公式为:2n=2x=32=12m+16sm+4st,属2B型。6个种染色体中均未发现随体。其中尖苞雪莲和柱茎风毛菊染色体为首次报道。     

国产毛茛属植物五种一变种的核型

对国产6种毛茛属(Ranunculus)植物进行了核型研究。它们的核型公式分别为:扇叶毛茛2n=4x=32=12m 20sm,云生毛茛2n=4x=32=16m 10sm 6st,曲升毛茛2n=4x=32=14m 16sm 2st及2n=5x=40=18m 16sm 4st 2T,西南毛茛2n=2x=16=12m 2sm 2st,匍枝毛茛2n=2x=16=8m 8st及2n=4x=32=12m 4sm 14st 2t,棱喙毛茛2n=2x=16=6m 6sm 4st。并结合形态及孢粉的资料就毛茛属植物核型不对称系数对分类的意义进行分析。     

五种云杉的核型分析

作者分析了我国产的5种云杉的核型,结果如下:红皮云杉,2n=24=20m(4sc)+4sm;白扦2n=24=22m(6sc)+2sm+2B;青扦,2n=24=16m(6sc)+8sm+2B;雪岭杉2n=24=20m(6sc)+4sm;鱼鳞云杉,2n=24=22m(4sc)+2sm+1B。