青海南部太白韭4居群的核型研究

研究了葱属太白韭青海４个居群的染色体数目和核型。结果如下,居群１：２ｎ＝２ｘ＝１６＝１２ｍ＋２ｓｍ＋２ｓｔ（２ＳＡＴ）,居群２：２ｎ＝２ｘ＝１６＝１４ｍ＋２ｓｔ（２ＳＡＴ）;居群３：２ｎ＝４ｘ＝３２＝２４ｍ＋４ｓｍ＋４ｓｔ（４ＳＡＴ）,居群４：２ｎ＝２ｘ＝１６＝１４ｍ＋２ｓｔ（２ＳＡＴ）＋Ｂｓ（０－２）。并讨论了多倍体和Ｂ染色体形成与分析。     

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＝?     

山东10种植物的核型分析

对山东１０ 种植物进行了核型分析。茴茴蒜（ Ｒａｎｕｎｃｕｌｕｓｃｈｉｎｅｎｓｉｓ Ｂｇｅ－） 染色体数目２ｎ ＝１６ , 核型公式Ｋ（２ｎ） ＝ ２ｘ ＝ １６ ＝ ２ Ｍ ＋ ２ｍ ＋ ２ｓｍ ＋ １０ｓｔ, “３Ａ”类型; 五脉地椒（ Ｔｈｙｍｕｓｑｕｉｎｑｕｅｃｏｓｔａｔｕｓ Ｃｅｌａｋ－） 染色体数目２ｎ＝ ２６ , 核型公式Ｋ （２ｎ） ＝ ２ｘ＝ ２６ ＝ ８ Ｍ ＋ １８ｍ , “１Ａ”类型; 蛇床（ Ｃｎｉｄｉｕｍ ｍｏｎｎｉｅｒｉ（Ｌ－） Ｃｕｓｓ－） 染色体数目２ｎ＝ ２０ , 核型公式Ｋ （２ｎ） ＝ ２ｘ＝ ２０ ＝ ２Ｍ＋ １６ｍ ＋ ２ｓｍ , “２Ｂ”类型; 波斯菊（ Ｃｏｓｍｏｓ ｂｉｐｉｎｎａｔｕｓ Ｃａｖ－） 染色体数目２ｎ ＝ ２４ , 核型公式Ｋ（２ｎ） ＝ ２ｘ ＝ ２４ ＝ １６ｍ ＋ ２ｍ （ｓａｔ） ＋ ６ｓｍ , “２Ａ”类型; 白车轴草（ Ｔｒｉｆｏｌｉｕｍ ｒｅｐｅｎｓ Ｌ－） 染色体数目２ｎ＝ ３２ , 核型公式Ｋ （２ｎ） ＝ ４ｘ ＝ ３２ ＝ ３２ｍ , “１Ａ”类型; 铁苋菜（ Ａｃａｌｙｐｈａ ａｕｓｔｒａｌｉｓ Ｌ－）染色体数目２ｎ ＝ ３２ , 核型公式Ｋ （２ｎ） ＝ ２ｘ＝ ３２ ＝ ３２ｍ , “１Ｂ”类型; 地构叶（ Ｓｐｅｒａｎｓｋｉａ ｔ?     

东北蒿属莳萝蒿组6种植物核型研究

报道东北蒿属莳萝蒿组６种植物的染色体数,５种为首次报道,对其中的５种进行了核型分析。核型公式分别为：大籽蒿２ｎ＝２ｘ＝１８＝１４ｍ＋２ｓｍ（２ＳＡＴ）＋２ｓｔ（ＳＡＴ）;矮滨蒿（Ａ．ｎａｋａｉ Ｐａｍｐ）２ｎ＝２ｘ＝１６＝１２ｍ＋４ｓｍ;碱蒿（Ａ．ａｎｅｔｈｉｆｏｌｉａ Ｗｅｂ．ｅｘ Ｓｔｅｃｈｍ．）２ｎ＝２ｘ＝１６＝１２ｍ＋２ｓｍ＋２ｓｔ;莳萝蒿（Ａ．ａｎｅｔｈｏｉｄｅｓ Ｍａｔｔｆ）２ｎ＝２ｘ     

五叶木通茎尖染色体核型分析

用五叶木通（Ａｋｅｂｉａ ｑｕｉｎａｔａ）茎尖细胞染色体制片,探讨其染色体组型。结果表明：五叶木通的核型公式为２ｎ＝２ｘ＝１６＝１０ｍ＋２ｓｍ＋２ｓｔ＋２ｔ,染色体基数ｘ＝８,核型为２Ｂ类型。第一号染色体上有一对染色体随体,它是五叶木通种性识别的重要标志之一。     

THINOPYRUM BESSARABICUM和THINOPYRUM ELONGATUM的基 …

对２个八倍体Ｃ．Ｓ－Ｔｈｉｎｏｐｙｒｕｍ ｂｅｓｓａｒａｂｉｃｕｍ（ＡＡＢＢＤＤＪＪ,２ｎ＝８ｘ＝５６）和Ｇｏｓｈａｗｋ（ＧＨＫ）－Ｔｈｉｎｏｐｙｒｕｍ ｅｌｏｎｇａｔｕｍ（ＡＡＢＢＤＤＥＥ,２ｎ＝８ｘ＝５６）的根尖细胞染色体进行Ｃ－分带,从中分检出Ｔｈ．ｂｅｓｓａｒａｂｉｃｕｍ和Ｔｈ．ｅｌｏｎｇａｔｕｍ的各自染色体进行核型分析,结果表明：Ｔｈ．ｂｅｓｓａｒａｂｉｃｕｍ和Ｔｈ．ｅｌｏｎｇａｔｕｍ的     

子午岭产4种百合科植物的核型多样性研究

对子午岭产百合科黄精属大苞黄精（Ｐ．ｍｅｇａｐｈｙｌｌｕｍ）、玉竹（Ｐ．ｏｄｏｒａｔｕｍ）,百合属的细叶百合（Ｌ．ｐｕｍｉｌｕｍ）,葱属的糙葶韭（Ａ．ａｎｉｓｏｐｏｄｉｕｍ）４种植物进行了染色体研究。其染色体数目和核型分别为：玉竹２ｎ（２ｘ）＝２０＝１２ｍ（２ＳＡＴ）＋８ｓｍ,核型为２Ｂ型;大苞黄精２ｎ（２ｘ）＝２２＝４ｍ＋１２ｓｍ＋６ｓｔ,核型为３Ｂ型;细叶百合２ｎ（２ｘ）＝２４＝４ｍ＋１０ｓｔ     

中国东北蒿属龙蒿组植物核型研究

报道了东北蒿属龙蒿组１０个各植物的核型。核型公式分别为：龙蒿（Ａｒｔｅｍｉｓｉａ ｄｒａｃｕｎｃｕｌｕｓ．Ｌ．）（２ｎ）＝４ｘ＝３６＝２８ｍ＋８ｓｍ;猪毛蒿（Ａ．ｓｃｏｐａｒｉａ Ｗａｌｄｓｔ．ｅｔ Ｋｉｔ．（２ｎ）＝２ｘ＝１６＝１２ｍ＋４ｓｍ;盐蒿（Ａ．ｈａｌｏｄｅｎｄｒｏｎ Ｔｕｒｃｚ．ｅｘ Ｂｅｓｓ．）（２ｎ）＝４ｘ＝３６＝３０ｍ＋４ｓｍ＋２ｓｔ;光沙蒿（Ａ．ｏｘｙｃｅｐｈａｌａ Ｋｉｔａｇ     

三种毛茛的核型研究

对３种（含１变种）毛莨属植物进行了核型研究,其染色体数目及核型资料为首次报道。三叶毛莨（ＲａｎｕｎｃｕｌｕｓｊａｐｏｎｉｃｕｓＴｈｕｎｂ．ｖａｒ．ｔｅｒｎａｔｉｆｏｌｉｕｓＬ．Ｌｉａｏ．）有两种核型。即基本型２ｎ＝２ｘ＝１４＝６ｍ＋４ｓｍ＋４ｓｔ（２ＳＡＴ）和杂合型２ｎ＝２ｘ＝１４＝６ｍ＋４ｓｍ＋４ｓｔ（１ＳＡＴ）,前者核型的特征是其随体较大,而后者核型变异发生在第２对和第３对同源染色体异形上,并     

中国木兰属部分种的核型分析

对我国木兰属（Ｍａｇｎｏｌｉａ）１２个种的核型进行了分析,ｘ＝１９,厚朴、凹叶厚朴、红花山玉兰、山玉兰、天目木兰、夜合为二倍体,２ｎ＝２ｘ＝３８;紫玉兰、玉兰、玉堂春为四倍体,２ｎ＝４ｘ＝７６;乐东木兰、荷花玉兰、狭叶荷花玉兰为六倍体,２ｎ＝６ｘ＝１１４,该属具有属内多倍体（次生多倍化）。核型分析结果表明：木兰属种间核型差异较小,大部分为中部着丝粒染色体（ｍ）,少数为具近中部着丝粒染色体（ｓｍ）,二倍体种中只有一对具近端部着丝粒染色体（ｓｔ）,其核型均为２Ｂ型。     

Studies on Karyotypes and Phylogenetic Relationship of Allium Sect. Caloscordum (Liliaceae) from China

The present papar is a report on cytotaxonomical studies of Allium Sect． Caloscordum(Liliaceae)from China． Six populations of A. neriniflorum and A．tubiflorum were introduced from Shaanxi,Hebei(Beijing),Liaoning and Heilongjiang．Based on the introduction and cultivated experiment, the authors made a karyotype analysis and a morphological comparison of the six populations． The results are as follows． Except the population 5 (Baihuashan,Beijing),which was found to be tetraploid 2n＝4x＝32,all the populations were dipliod 2n=2x＝16． There were two types of satellites： terminal and intercalary． The basic number,the karyotypes as well as the types of satellites in Sect． Caloscordum were the same as those in the other sections of Allium． In the populations 1, 2, 3 and 4(Daheshan,Jinxia County,Liaoning;Taikang County, Heilongjiang; Chengde to Huaqing, Hebei; Liulimao, Huairou,Beijing．), the sixth pair of chromosomes had a pair of intercalary satellites,the mean length of pedicels is about 7 cm and the plant had no two-growth cycle．In the populations 6 (Xianyunei, Huashan, Shaanxi)： the eighth chromosome pair had a pair of terminal satellites, the pedicel was shorter,with the mean length 2．39 cm,and the plant had two-growth cycle． In the tetraploid population 5; fourteenth and sixteenth chromosome pairs both had a pair of terminal satellites,the mean length of pedicel was 2．39 cm and the plant had the two-growth cycle．According to the results,the authors keep Sect． Caloscordum in the genus Allium and recognize two species in China in the section; the populations 1, 2, 3 and 4 belong to A．neriniflorum,and the populations 5 and 6 to A．tubiflorum．Our observation on dissecting ovary showed that there were 2～11 ovules per locule;the diploid populations mainly had 5 ～6 ovules per locule,while the tetraploid ones mainly had 4 ovules per locule．Therefore, the number of ovules per locule is not a reliable character for classifiction but it may be useful in distinguishing diploid from tetraploid．However,we consider that the satellite type,the pedicel length and whether the plant has two-growth cycle are the diagnostic features for the species of Sect．Caloscordum．     

国产葱属合被组植物的核型及亲缘关系研究

本文对国产百合科葱属合被组(Sect．Caloscordum)的长梗韭(Allium neriniflorum Baker)和合被韭(A.tubiflorum Rendle)共6个居群进行了调查和栽培实验,在此基础上,从细胞学、形态解剖学等角度对各居群进行了研究,通过核型分析及形态比较认为：将合被组置于葱属中更合理。种的划分可根据核型中随体的类型、小花梗的长度、植物在一年的生长周期中是否有明显的二次生长现象为标准来划分。每室胚珠的多少只能反映出二倍体与四倍体的区别,不能作为分种指标。本文有关合被韭的核型研究的报道在国内尚属首次。     

百合科扭柄花属一个新的染色体基数

对中国云南西部和西北部分布的腋花扭柄花Streptopus simplex的4个居群进行了细胞学研究。生长在云南西北香格里拉县(原中甸县)碧塔海和小中甸冷杉林中的腋花扭柄花两个居群的体细胞染色体数目为2n=2x=18,而生长在高黎贡山的福贡县片马和贡山县的灌丛中的植物体细胞染色体数目则为2n=2x=14。2n=14为腋花扭柄花一个新的染色体数目,x=7为扭柄花属一个新的染色体基数。香格里拉碧塔海和小中甸两个居群的核型公式分别为2n=4m+8sm+4st和2n=8m+2sm+6st,染色体逐渐变小;贡山和福贡片马两个居群的核型公式分别为2n=14=4m+10sm和2n=14=7m+7sm,其中第一对中部着丝粒的染色体显著大于其余染色体。由于x=8是扭柄花属最常见的染色体基数,因此可认为x=8是腋花扭柄花的染色体原始基数,x=7的数目是衍生的;x=7居群染色体的一条大染色体可能是由x=8的染色体的两条st型染色体的着丝粒发生了罗伯逊易位而来。     

粗根韭的核型分化研究

对葱属粗根韭的3个地方居群的核型分析结果表明,3个居群的核型表现出很大的差异。西藏 达孜居群为2n=2x=20=4m+10sm+2t(2SAT)+4T;四川乡城居群为2n=2x=20=10sm+6t (2SAT)+4T;四川理县居群为2n=2x=20=6m+1Osm+2t(2SAT)+2T。虽然它们之间在核型上存 在差异,但除达孜居群的植株较矮小外,3个居群的植物在形态上却非常一致。理县居群的核型被认为 是原始类型,由它通过染色体结构变异,分别演化出更不对称的达孜居群和乡城居群。葱属中,目前只 发现4个种的染色体基数为10,除本种外其余3种分别是A．decipiens Fisch．;A．kujukense Vved．和 A．chelotum Wendelbo。根据这4个种的核型特征和分布格局,基数10可能有不同的起源,至少粗根韭 的起源与其余3种不同,而且起源最晚。粗根韭的核型特征及它与染色体基数为11的宽叶韭A．hook- eri Thwaites在核型上的相似性,表明它们很可能共同起源于基数为10但现已绝灭的祖先种。此外,还探讨了该祖先种的起源问题。     

Karyotype analysis in Hyacinthella dalmatica (Hyacinthaceae) reveals vertebrate-type telomere repeats at the chromosome ends.

Chromosome analysis of three different populations of Hyacinthella dalmatica (Lallem.) Trinajsti?, an endemic species of the coastal region of southeastern Europe, showed a unique chromosome number, 2n = 2x = 20, and bimodal karyotype with one large and nine smaller pairs of chromosomes. Staining with fluorochromes CMA3 (chromomycin A3) and DAPI (4,6-diamidino-2-phenylindole) revealed heterochromatic regions associated with NORs, centromeres, and several interstitial heterochromatic bands on the longest chromosome pair. Double-target FISH with two ribosomal DNA probes revealed one locus of 5S rRNA genes in the pericentromeric region of chromosome pair 3 and one locus of 18S-5.8S-26S rRNA genes on the short arm of chromosome pair 4 in all plants and populations analyzed. Southern hybridization analysis and FISH experiments demonstrated that the distal ends of H. dalmatica chromosomes contain the vertebrate telomere (5'-TTAGGG-3') repeat type rather than the Arabidopsis (5'-TTTAGGG-3') heptamer, and so suggest that this Asparagales species along with Aloe and Othocallis contains the vertebrate-type telomere repeat.     

A Study on Karyotype Differentiation of Allium fasciculatum (Liliaceae)

Karyotypes of three local populations of Allium fasciculatum Rendle were analyzed. The karyotype of the population from Dagze of Xizang was 2n=2x＝20=4m+10sm +4T+2t(2SAT), the one from Xiangcheng of Sichuan was 2n=2x＝20＝10sm+6t(2SAT)+4T, and the one from Lixian of Siehuan was 2n＝2x=20＝6m+10sm+2t (2SAT)+2T. Although there were differences in karyotypes among the three populations, they were very similar in morphological characters, except that plants in the Dagze population were lower. The karyotype of the Lixian population is considered to be a primitive one that has evolved into the more asymmetrical karyotypes of the Dagze population and Xiangcheng population by structural aberration. In the genus Allium, only four species, A. fasciculaturn, A. decipiens Fisch., A. kujukense Vved. and A. cheloturm Wendelbo. have so far been found to have the basic chromosome number of x＝10. According to karyotype characters and the distribution pattern of these four species, the basic number x = 10 may have different origins. At least that of A. fasciculatum is different from that of the other three species and might have originated the latest. A. fasciculatum was similar to A. hookeri Thwaites (the latter has x＝11) in karyotypical and morphological characters. Therefore, they are considered to have originated from a common extinct ancestor that had the basic number of x = 10.ey words Allium;A．fasciculatum Rendle;Karyotype differentiation     

Cytology of ten species in Anemone,one in Anemoclema and six in Clematis (Trib. Anemoneae,Ranunculaceae) from China

The somatic chromosome number and detailed chromosome morphology have been studied in ten species of Anemone, one species of Anemoclema, and six species of Clematis, all from China, namely Anemone davidii Franch. (2n=4x= 32), A. stolonifera Maxim. (2n=2x=16), A. flaccida Fr. Schmidt (2n=2x= 14), A. rivularis Buch.-Ham. (2n=2x= 16), A. begoniifiolia lévl. et Vant. (2n=2x= 16), A. hupehensis Lem. f. alba W. T. Wang (2n =2x = 16), A. tomentosa (Maxim.) Péi (2n=2x= 16), A. rupestris Hook. f. et Thoms. (2n=2x= 14), A. trullifolia var. colestina (Franch.) Finet et Gagnep. (2n = 2x = 14), A. trullifolia var. holophylla Diels (2n=2x= 14), A. demissa Hook. f. et Thoms. (2n=2x= 14), Anemoclema glaucifolium (Franch.) W. T. Wang (2n= 2x= 16), Clematis kockiana Schneid. (2n= 2x=16), C. rehderiana Craib. (2n = 2x = 16), C. ranunculoides Franch. (2n = 2x = 16), C. puberula var. ganpiniana(Lévl. et Vant. ) W. T. Wang (2n = 2x = 16), C. brevicaudata DC. (2n= 2x= 16), C. chrysocoma Franch. (2n = 2x = 16). The species of x = 8 in Anemone, and those in Anemoclema and Clematis have very similar karyotypes which consist of five pairs of large median-centromeric (rarely one pair of which are submedian-centromeric) and three pairs of subterminalor terminal-centromeric chromosomes.     

国产毛茛科银莲花族十七种植物的细胞学研究

研究了国产毛茛科银莲花族Trib．Anemoneae 17种植物的染色体数目和核型。10种银莲花属 Anemone L．植物中,1种(西南银莲花A．davidii)为x=8的四倍体(2n=4x=32),5种(匍枝银莲花A． stolonifera、草玉梅 A．rivularis、卵叶银莲花A ．begoniifolia、水棉花A．hupehensis f. alba、大火草A．tomen- tosa)为x=8的二倍体(2n=2x=16),4种(鹅掌草A．flaccida、湿地银莲花A．rupestris、蓝匙叶银莲花 A．trullifolia var．colestina、拟条叶银莲花A．trullifolia var．holophylla、展毛银莲花A．demissa)为x=7的 二倍体(2n=2x=14)。罂粟莲花Anemoclema glaucifolium 为x=8的二倍体。6种铁线莲属Clematis L.植 物(滇川铁线莲C．kockiana、长花铁线莲C．rehderiana、毛茛铁线莲C．ranunculoides、扬子铁线莲C． puberula var．ganpiniana、短尾铁线莲C．brevicaudata、金毛铁线莲A．chrysocoma)均为x=8的二倍体。银 莲花属中x=7的种类的核型彼此十分相似,均由6对大型具中部着丝点的染色体和1对具端部着丝点 的染色体组成;x=8的二倍体种类的核型与罂粟莲花属和铁线莲属植物的核型十分相似,均由5对大型 具中部着丝点和3对具端部或近端部着丝点的染色体组成。     

A Cytological Study of Six Populations of Disporum cantoniense (Liliaceae)

Disporum cantoniense (Lour.) Merr. is widely distributed in the area from the Himalayas to Indonesia, via south China, Indo-China and Taiwan, especially in the various parts of Yunnan Province. In this paper, the karyotype variation of six populations of the apecies from southeastern, middle and northwestern part of Yunnan are studied. The result shows that the chromosome number of all the populations are 2n= 14. The species was reported to have 2n= 16, 30 (Hasegawa 1932, Mehra and Pathamia 1960, Kurosawa 1966, 1971, Tang et al. 1984) and 2n= 14 (Kurosawa 1971, Mehra and Sachdeva 1976a). 2n= 14, 2n= 16 and 2n=32 were observed in the material from Taiwan (Chuang, et al. 1962, Chao, 1963, Hsu, 1971, 1972, Chang, 1974). Based on the cytological study of D. megalanthum Wang et Tang and seven other species in this genus reported by other authors, Hong and Zhu (1990) consider that the basic number of this genus is x= 8, because species with 2n= 16 was more than those with 2n= 14, despite some number variation of chromosomes in this genus. Based on the results of the present paper, we consider that x= 7 might be one of the basic numbers of this genus. In the karyotypes studied here, the relative chromosome lengths and the ratio of the longest/the shortest chromosomes of the six populations are rather approximate. Moreover, all the karyotypes belong to Stebbins’3B type. However, karyotype variation was detected in these populations. The homologues of the 2nd, 3rd and 6th pair of chromosomes are different from each other, the numbers and popsition of satellites are found very different, among the populations except for the Lijiang population, the 1st, 2nd, 3rd or 4th pair of all the populations exhibited heterozygosity. Although all the karyotypes belong to Stebbins ‘3B type, the homologues were more regular in the Lijiang population than in the other populations, and the most irregular in the Wenshan population, because it hadfour pairs of heterozygous chromosomes.     

荞麦野生种的核型及进化特征分析

荞麦起源于我国西南地区,该地区分布着丰富的荞麦野生种,剖析野生荞麦的核型特征对荞麦进化和育种研究具有重要的意义。本研究以甜荞近缘种、硬枝万年荞、疏穗小野荞、细柄野荞、齿翅野荞为试验材料,采用常规压片法进行核型鉴定。结果表明:甜荞近缘种、硬枝万年荞和疏穗小野荞都为二倍体,核型公式分别为2n=2x=16=12M+4m(2SAT)、2n=2x=16=16M、2n=2x=16=14M+2m(2SAT),而细柄野荞和齿翅野荞为四倍体,核型公式分别为2n=4x=32=32M、2n=4x=32=30M+2m(2SAT)。甜荞近缘种和硬枝万年荞核型属1A型,疏穗小野荞、细柄野荞和齿翅野荞核型属1B型,并且甜荞近缘种、疏穗小野荞和齿翅野荞都有1对随体染色体。研究证明,荞麦野生种染色体的基数为8,有二倍体和四倍体野生荞麦。通过比较分析,硬枝万年荞在进化地位上比较原始,齿翅野荞是比细柄野荞较进化的四倍体荞麦野生种。