J Integr Plant Biol. ›› 1983, Vol. 25 ›› Issue (1): -.

• Research Articles •    

Preliminary Observatiun of the Sex-Chromosomes of Rumex acetosa in China

Wu Shi-bin and Lee Cheng-lee   

Abstract: The Rumex acetosa L. in China possesses sex-chromosomes 2n=12A+XX in female plant and 2n=12A+XY1Y2 in male plant. The sex-chromosomes of male plant exhibit a chain of trivalent (Y1-X-Y2) in diakinesis of PMC meiosis. At metaphase Ⅰ, they make a V-shaped or a ring configuration. Some of them may form a XY-bivalent and a Y-univalent. Finally two kinds of reale gametes e.g. 6A+X and .6A+YY, are produced. Monoecious plant may be found in R. acetosa and has 22 chromosomes (22=18A+ XX+YY). This is a triplont with sterility. Cells with different chromosome number in the same plant have also seen in R. acetosa, and such plant never blooms in its life.

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