| 中国苹果属植物染色体观察 |
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| 引用本文： | 梁国鲁.中国苹果属植物染色体观察[J].中国科学院研究生院学报,1987,25(6):437-441. |
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| 作者姓名： | 梁国鲁 |
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| 作者单位： | (西南农业大学果树研究室，重庆) |
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| 摘 要： | 本文采用去壁低渗法，对原产我国的22种37个类型的苹果属植物的染色体数目进行
了观察，发现它们有2n＝34、51、68三种类型，多倍体种占41％，其中以三倍体种类居多，沧江海棠、西蜀海棠、尖嘴林檎、昭觉红花的染色体数以及花红中的四倍体类型均为首次报道。
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| 关 键 词： | 苹果属 染色体数目 多倍体 |
Observations of Chromosomes of Malus Species in China |
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| Liang Guo-Lu.Observations of Chromosomes of Malus Species in China[J].Journal of the Graduate School of the Chinese Academy of Sciences,1987,25(6):437-441. |
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| Authors: | Liang Guo-Lu |
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| Institution: | (Pomological Laboratory, Southwest Agricultural University, Chongqing, Sichuan) |
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| Abstract: | Somatic chromosome numbers of 37 forms (representing 22 species) of apples
in China were counted using wall-degradation and hypotonic method. Among the species in-
vestigated 3 categories of chromosome numbers, i.e. 2n=34, 51 and 68 are confirmed. The
chromosome numbers of the following species are here first reported: Malus ombrophila 2n=
34, M. prattii 2n=34, M. melliana 2n=34, Zhaojiaohonghua (M. sp.) 2n=34, and M. asiatica
var. 2n=68. Polyploids (including infraspecific polyploids) account for 41% of the total num-
ber of the species investigated. 51 is a predominant number. It is suggested that ploidy varia-
tion is an important pathway in apple evolution in China, and triploid may be considered as
a suitable evolution grade. There are rich apple germplasm resources in China. The systema-
tic studies of this genus are obviously essential. |
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| Keywords: | Malus Chromosome number Polyploid |
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