Utilization of 2n Gametes in Plant Breeding and Germplasm Enhancement

doi:10.3321/j.issn:1000-7091.2003.z1.008

Abstract

Abstract: The advantages,the prospects of the use of 2n gametes in plant breeding and germplasm enhancement,and the significance of unreduced gametes in plant evolution have been conf irmed. Both spantoneous andinduced 2n gametes were practicaly used in breeding programs of potato,red clove,goose berry etc. with admirableresult. The aim of this paper is to make an up- to- date review of 2n gametes in 4 subtopics. 1) Theg eneral research fields and their recent results; 2) the advances and the achivements of the use of 2n gametes in sexual polyploidization,germplasm utilization,maximizing heterozygosity,vercoming the Endosperm BalanceNumber barrier,breaking self-incompatibility,breeding for True Potato Seed and some else projects; 3) therecent studies on manipulating the efficiency of 2n gametes through recurrent selection,mechanical seperat ing 2n pollen,induced meiot ic mutant orinduction of 2n gametes; 4) the prospects of 2n gamete utilization.

Key words: Unreduced gamete, Ut ilization, Review

CLC Number:

S61.03

ZHANG Xin-zhong, YAN Li-ying, LIU Guo-jian, ZHAO Yong-bo, CHANG Rui-feng. Utilization of 2n Gametes in Plant Breeding and Germplasm Enhancement[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3321/j.issn:1000-7091.2003.z1.008.

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