Utilization of 2n Gametes in Breeding of Chinese Cabbage(Brassica campestris L.ssp.chinesis)

doi:10.3321/j.issn:1000-7091.1998.02.019

Abstract

Abstract: Certain 2n gametes have been successfully applied to breed new varieties of potato.In an attempt to use 2n gamete technique in Chinese cabbage breeding,2n gametes were investigated in 87 inbred lines and 3 hybrids.Out of 90 materials,12 lines possessed 2n gametes,accounting for 133 percent. Among them,five lines had both 2n pollens and 2n zygotes,accounting for 5.6 percent.Five diploids,which produced 2n gametes and had different heading types,were crossed with tetraploids Chinese cabbage respectively.Some new tetraploids with different maturity time were obtained.The advantages of these tetraploids are as follows: ① resistance to multiple diseases and cold resistance,tolerance to heat; ② high nutrient and flavor quality;and ③ rapid growth,and normal fertility.Three new tetraploidy varieties,“Polybreed 1",“Polybreed 2 " and “Polybreed 3",have been released.

Key words: Chinese cabbage, 2n gamete, Tetraploid, Breeding

CLC Number:

S634.1

Liu Xuemin, Li Guixi, Sun Rifei, Wang Yuhai, Wang Zixin. Utilization of 2n Gametes in Breeding of Chinese Cabbage(Brassica campestris L.ssp.chinesis)[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1998, 13(2): 102-105. doi: 10.3321/j.issn:1000-7091.1998.02.019.

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