查看文章

Intergeneric hybridization between wheat (Triticum aestivum L.) and a wild weedy species, Imperata cylindrica (2n = 20) resulted in the recovery of a high frequency of wheat haploids, which were obtained through the elimination of I. cylindrica chromosomes. Cytological analysis of the root tips revealed the somatic chromosome count of the regenerants equalled 21. Haploid regenerants were also obtained in all the crosses of wheat F1s with I. cylindrica, implying the genotype nonspecific nature of wheat x I. cylindrica hybridization. Variation among wheat F1 hybrids was observed with respect to seed formation (44.9‐84.5%), embryo formation (15.1‐47.7%) and regeneration (27.0‐75.0%) in crosses with I. cylindrica. Comparisons based on the efficiency of I. cylindrica and maize (Zea mays) as pollen sources indicated that Imperata‐mediated haploid production is equally efficient. There is natural coincidence of …