Studies of Karyotype in Carica papaya

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (2): 389-391.

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Studies of Karyotype in Carica papaya

WangWeixing; Li Chunyan;Liang Guolu^*

(College of Horticulture and Landscape, Southwest University, Chongqing 400716, China)

Received:2005-04-29 Revised:2005-12-27 Online:2006-04-25 Published:2006-04-25

Abstract

Abstract: Analyzed karyotypes of three varieties of Carica papaya including ‘Suizhonghong ’,‘Risheng’and ‘Meizhonghong’. The results showed that they all have a pair ofmedian satellites located on the sixth pair chromosomes of ‘Suizhonghong’ and ‘Risheng’ and on the seventh pair chromosomes of ‘Meizhonghong’. And we analyzed the heterochromosomes in ‘Suizhonghong’and ‘Risheng’. According to the results, we primarily discussed that there are sex chromosomes or not in Carica papaya. The karyotype formulas of three varieties: ‘Suizhonghong’, 2n = 2x = 18 = 16m (2SAT) + 2 sm; ‘Risheng’, 2n = 2x = 18 = 14m (2SAT) + 4 sm; ‘Meizhonghong’, 2n = 2x = 18 = 16m (2SAT) + 2 sm, and three karyotypes all are “2A”, but there are some differences among them.

Key words: Carica papaya, Karyotype, Heterochromosomes, Sex chromosome

WangWeixing;Li Chunyan;Liang Guolu. Studies of Karyotype in Carica papaya[J]. ACTA HORTICULTURAE SINICA, 2006, 33(2): 389-391.

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Studies of Karyotype in Carica papaya

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