| 四川8个枇杷品种染色体变异研究 |
| |
| 引用本文： | 梁国鲁,任振川,阎勇,黄宏,吴纯清.四川8个枇杷品种染色体变异研究[J].园艺学报,1999,26(2):71-76. |
| |
| 作者姓名： | 梁国鲁 任振川 阎勇 黄宏 吴纯清 |
| |
| 作者单位： | 西南农业大学生物技术中心,重庆400716 |
| |
| 摘 要： | 对四川８个枇翁品种，早红１号，早红３号，金丰，龙泉８０－１，龙泉１号，大五星，黄肉及早白沙的核型进行了分析。其染色体数目均为２ｎ＝２ｘ＝３４。核型可分为两大类；第１类为前７个品种，核型由中部着丝粒染色体和的中部着丝粒染色体组成，最长染色体与最短梁色体比值均小于２，属２Ａ核型，其核型公式可表示为２ｎ＝２ｘ＝３４＝（１４－２０）ｍ＋（１４－２０）ｓｍ，表明具有极其近缘的关系。
|
| 关 键 词： | 枇杷 核型 变异 品种 染色体变异 |
| 修稿时间： | 1998-09-02 |
Chromosome Variation in 8 Loquat Varieties in Sichuan Province |
| |
| Liang Guolu,Ren Zhenchuan,Yan Yong,Huang Hong,Wu Chunqing.Chromosome Variation in 8 Loquat Varieties in Sichuan Province[J].Acta Horticulturae Sinica,1999,26(2):71-76. |
| |
| Authors: | Liang Guolu Ren Zhenchuan Yan Yong Huang Hong Wu Chunqing |
| |
| Abstract: | The karyotypes of 8 loquat
varietiesEriobotrya japonica(Thunb)Lindl.in Sichuan i.e .Zaohong No.1 ,Zaohong No.3
,Jinfeng,Longquan 80-1,Longquan No.1 ,Dawuxing,Huangrou and Zaobaisha were studied by
the hypotonic degradation method.According to karyotype types,8 loquat varieties can be
divided into two groups.The first group,including the former 7 varieties of 8,consists of only two
types of chromosome metacentric(m)and submetacentric chromosome(sm),which belong
to2Akaryotype with the ratio of the longest to the shortest chromosome less than 2,and their
karyotype formula can be summed as 2 n=2 x=34=(14-20)m (14-20)sm.The second group only
involves a variety Zaobaisha with white pulp of fruit,which contains two subtelocentric
chromosomes(st)besides the two types of chromosomes mentioned above,belonging
to3Bkaryotype with 2 n=2 x=34=13 m 19 sm 2 st.The first and second pairs of chromosomes in
Zaobaisha consist of a subtelocentric chromosome(st)and a submetacentric
chromosome(sm),respectively,which show a high heterozygositical karyotype.It suggets that
the second karyotype would be evolved from the first one.Two group karyotypes conforms to
the result of loquat classification according to their colour of pulp of fruit.Finally,the cytogenetic
mechanism of chromosomal structure variation is discussed. |
| |
| Keywords: | LoquatE japonica(Thunb)Lindl Karyotype Variation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
