Abstract: Maize doubled haploid breeding is a rapid method to generate pure elite inbred lines. Two sister inbredlines,BX08 and BX19,both belong to BSSS(Iowa Stiff Stock Synthetic) are usedfor the study.These two lines have pooragronomic traits,but compensating to each other. Crosses were made between those two lines. The F₁plants were crossedby pollen from haploid induction line carrying purple crown and purple plumule color. A total of 74 ears had at least 1-kenel (D1 seeds) seed set. Among those doubled haploid lines,33 cbubled haploid lines had D2 seeds. The Dl ear or D2seeds were materials and data of ear length,row number,kernel volume,kernel weight,kernel density (weight/ volume)were collected. Results indicated that haploid breeding was in favor of kernel volume and kernel weight improvement. Bothtraits of kernel volume and kernel weight are mainly controlled by additive gene effect. Far length and row number aremost likely controlled by cbminant gene effect. Results also indicated that haploid breeding could be very effective to elirtrmate unfavorable genes due to uncovering those deleterious genes at its haploid phase. Therefore,haploid breeding methodcan have its selective advantages against poor agronomic genetic traits for seed and plant growth and development.

Key words: Maize, Haploid, Inducing lines, Doubled haploid (DH) lines

CLC Number: 

• S513.03