国产姜科植物的染色体计数(5)

<正> 本文继续对7属15种国产姜科植物作染色体计数观察,其中10种是染色体计数的新纪录(表、图)。通过对黄花大苞姜(Caulokaempferia coenobialis)和大苞姜(C.yunnanensis)以及凹唇姜(Bosenbevgia rotunda)和心叶凹唇姜(B.fallax)的染色体观察,确定了大苞姜属(Caulokaempferia)和凹唇姜属(Bosenbergia)的染色体基数分别为12和9。

A REPORT ON CHROMOSOME NUMBERS ON CHINESE ZINGIBERACEAE (5)

This is a fifth paper on the chromosome numbers on Chinese Zingiber-aceae.Chromosome counts(2n,n)are reported for 15 species,spreading over 10 genera,of which 11 species are new records.The present records are as follows:Alpinia malaccensis(Burm.)Rose.,2n=48(Guangdong),Alpinia poly ant ha D.Fang,2n=48(Guangxi),Amomum austrosinense D Fang,2n=96(Guangdong),Amomum maximum Roxb.,n=24(Yunnan),Amomum tsao-ko Crevost & Lemarie,2n=48(Yunnan),Bosenbergia rotunda(L.)Mansf.,2n=36(Yunnan),Bosenbergia falllax Loes.,2n=36(Yunnan),Cau'okaempferia coenobia is(Hance)Larsen,n=12(Guangdong),Caulokaempferia yun-nanensis(Gagnep.)R.M.Smith,2n=42(Sichuan),Costus speciosus(Keen.)Smith,2n=18(Yunnan),Curcuma kwangsiensis S.Lee et C.F.Liang,2n=84,n=42(Guangxi),Globba emeiensis Z.Y.Zhu,2n=24(Sichuan),Kaempferia rotunda L.,2n=44(Guangdong),Roscoea tibetica Bat.,2n=24(Yunnan)and Zingiber corallinum Hance,2n=22(Guangdong).Amomum austrosinense is an octoploid,2n=8x=96.The meiosis fo Curcuma kwangsiensis(2n=84)is regular and 42 bivalents are regularly observed at metaphase I.Cau'okaempferia yunnanensis(2n=42)has been determined from mitosis only and the Plants yield normal fruits and seeds.This suggests a high basic number of 21 for the species,same as the species of Curcuma and Hitchnia.Cau'okaempferia yunnanensis is quite different cytologically from Caulokaempferia coenobilis(n=12)and C.a ba(2n=24).It seems that the transfer of Caulokaempferia yunnanensis from a monotypic section(Sect.Pyrgophyllum R.M.Smith)of Caulokaempferia to a new monotypic qenus is supported.The authors have also ascertained the basic chromosome number of Bosenbergia is 9 and that of Caulokaempferia is 12.All the voucher speciments of the present study are preserved in the Herbarium of South China Institute of Botany,Academia Sinica.This is a fifth paper on the chromosome numbers on Chinese Zingiber-aceae.Chromosome counts(2n,n)are reported for 15 species,spreading over 10 genera,of which 11 species are new records.The present records are as follows:Alpinia malaccensis(Burm.)Rose.,2n=48(Guangdong),Alpinia poly ant ha D.Fang,2n=48(Guangxi),Amomum austrosinense D Fang,2n=96(Guangdong),Amomum maximum Roxb.,n=24(Yunnan),Amomum tsao-ko Crevost & Lemarie,2n=48(Yunnan),Bosenbergia rotunda(L.)Mansf.,2n=36(Yunnan),Bosenbergia falllax Loes.,2n=36(Yunnan),Cau'okaempferia coenobia is(Hance)Larsen,n=12(Guangdong),Caulokaempferia yun-nanensis(Gagnep.)R.M.Smith,2n=42(Sichuan),Costus speciosus(Keen.)Smith,2n=18(Yunnan),Curcuma kwangsiensis S.Lee et C.F.Liang,2n=84,n=42(Guangxi),Globba emeiensis Z.Y.Zhu,2n=24(Sichuan),Kaempferia rotunda L.,2n=44(Guangdong),Roscoea tibetica Bat.,2n=24(Yunnan)and Zingiber corallinum Hance,2n=22(Guangdong).Amomum austrosinense is an octoploid,2n=8x=96.The meiosis fo Curcuma kwangsiensis(2n=84)is regular and 42 bivalents are regularly observed at metaphase I.Cau'okaempferia yunnanensis(2n=42)has been determined from mitosis only and the Plants yield normal fruits and seeds.This suggests a high basic number of 21 for the species,same as the species of Curcuma and Hitchnia.Cau'okaempferia yunnanensis is quite different cytologically from Caulokaempferia coenobilis(n=12)and C.a ba(2n=24).It seems that the transfer of Caulokaempferia yunnanensis from a monotypic section(Sect.Pyrgophyllum R.M.Smith)of Caulokaempferia to a new monotypic qenus is supported.The authors have also ascertained the basic chromosome number of Bosenbergia is 9 and that of Caulokaempferia is 12.All the voucher speciments of the present study are preserved in the Herbarium of South China Institute of Botany,Academia Sinica.