The varieties with common basic N-nanding pattern (1A, 2A, 3A, 4A, 5A, 6A, 7A) accounted for 11. 96% of studied barleys, the relation-ships between N-banding pattern and geographical region were discussed.
N-banded barley chromosomes were analyzed by both chromosome image analyzing system (CHIAS) and traditional method. CHIAS is a computer system especially for plant chromosomes.
Seven complete chromosomes and nine telocentric chromosomes in telotrisomics of barley (Hordeum vulgare L.) were identified and designated by an improved Giemsa N-banding technique.
The biocompatibility in vitro of Ti-15Mo-3Nb and the potassium titanate biological thin film/titanium alloy was studied using simulated body fluid cultivation, kinetic clotting of blood and osteoblast cell cultivation experiments in vitro.
Synthesis of transition metal oxides MO2 (MIV = Mo, W, or Nb) and V6O13 in alkali chloride melts and their crystallographic characteristics are described.
The somatic chromosomes of tetraploid wheats(AABB and AAGG)and probable donors of B and G genomes Ae.speltoides,Ae.longissima,Ae.sharonensis,Ae.bicornis and Ae.searsii were identified by an N-ban-ding technique.All chromosomes of A genome but 4A were banded withweak bands or no band.There was general similarity of N-banding pat-terns between B and G genome chromosomes but the G genome chromoso-mes were more heterochromatic.The N-banding patterns of Ae.speltoi-des,with the exception of chromosomes 4B and 4G,...
用染色体 N—分带技术对四倍体小麦(AABB 和 AAGG)以及 B 和 G 染色体组的可能供体拟斯卑尔脱山羊草(Ae.speltoides)、高大山羊草(Ae.longissima)、沙融山羊草(Ae.sharonensis)、二角山羊草(Ae.bicornis)和西尔斯山羊草 Ae.se-arsii 的体细胞染色体进行核型分析。除染色体4 A 以外的所有 A 组染色体只有较浅的 N—带或无带。B 组和 G 组染色体(4 B 和 G 4除外)的 N—带较深,但G 组染色体的异染色质化程度更高。拟斯卑尔脱山羊草的 N—带型比山羊草Sitopsis 组的其它种更接近于 B 组和 G 组染色体的 N—带型(4 B 和 G 4除外)。其中有一对染色体的 N—带型与四倍体小麦的4A 很相似。用硬粒小麦“Langdon”的双端体二体(double ditelosomics)材料与提莫菲维小麦(T.timopheevi)、阿拉拉特小麦(T.araraticum)和拟斯卑尔脱山羊草杂交,对 F_1植株花粉母细胞减数分裂中期Ⅰ的染色体进行 N—分带和对端体染色体的配对行为的观察结果表明,染色体4A 应重标为4B(在 AAGG...
A systematical study was made on meiotic chromosome configurationof hybrids between hexaploid wheats(AABBDD),tetraploid wheats(AABB),(AAGG) and E.intermedia.Bivalent numbers of the hybrids F_1 in PMC MI were 6.24 Ⅱ/cell,4.55 Ⅱ/cell and 4.52 Ⅱ/cell respectively.Bivalent number of(tetraploid wheat(AABB) × E.intermedia)F_1 was almost equal to that of(tetraploid wheat(AAGG) ×E.intermedia)F_1.But the bivalent number of(Triticum timopheevi(AAGG) × T.dicoccum(AABB))F_1 PMC MI was 7.28 Ⅱ/cell.It was confirmed thatt...
通过系统对比分析 ABD、AB、AG 等类型小麦与中间偃麦草杂交后 F_1的减数分裂资料确认中间偃麦草没有与小麦 B 组同源的染色体组。减数分裂染色体 N 带分析进一步证实了这一点。以目前研究来看,中间偃麦草染色体组型以有两组彼此部分同源,另一组与它们远缘为宜,建议以字母 NNiX 代之。
N-banded barley chromosomes were analyzed by both chromosome image analyzing system (CHIAS) and traditional method. CHIAS is a computer system especially for plant chromosomes. Traditional method analyzed banded chromosome photographs by measuring banded regions manually and this method produced bias in procedures of taking pictures and measuring. CHIAS can automatically remove noise from original image and reduce bias which cannnot be avoided in traditional method. Moreover, CHIAS can get chromosome bandin...