title: [Studies on taihe silkies' karyotype and band pattern].
abstract: This study made the chromosome slides of Taihe Silkies by the peripheral blood lymphocyte culture-drying method,and analyzed Taihe Silkies karyotype and band pattern. The results are as follow: The diploid chromosome number of Taihe Silkies was 2n=78,the basic number of chromosome arms was AF=90 and the sex chromosome type was ZZ(male symbol)/ZW(female symbol). According to the measured relative length,arm ratio and centromeric index,the first 10 pairs of macro-chromosomes are described as follows:No.1 ,9 and Z,W chromosomes were metacentrics,No.2,4,7 were submetacentrics,and No.3,6,8,10 were telocentrics. Studies on Taihe Silkies' G-band showed that the first 10 pairs of macro-chromosomes can be divided into 29 zones and 190 bands. Being treated by C-banding technique,a totally dark-stained and easily indentified W-chromosome always showed up in the female metaphase configurations. Ag-NORs were located in the short arms' telomere of No.1,2 euchromosomes and Z sexchromosome,the Ag-NORs number varied from 1-6. -NORs.
authors.affiliation: Dept of Anim Sci, Anim Sci and Med Coll, Yangzhou Uni, Yangzhou 225009, China.
authors.forename: Guo-Hong
authors.initials: GH
authors.lastname: Chen
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Xue-Yu
authors.initials: XY
authors.lastname: Zhang
authors.forename: Bi-Chun
authors.initials: BC
authors.lastname: Li
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Wu
authors.forename: Qi
authors.initials: Q
authors.lastname: Xu