关键词: 胡萝卜, 回交重组自交系, 始花期, 主薹高, 种子量, QTL

Abstract: A set of backcross inbred lines（BILs）crossed by a wild carrot species‘Songzi’with an orange cultivar‘Amsterdam’were used to deeply analyze the genetic influence of‘Songzi’chromosome fragments on date of initial flowering（DIF），main stalk length（MSL），and seed weight per plant（SWP）. The experimental results suggested that MSL was normal distributed in 2014 and 2015，but DIF was on the contrary，and that SWP was only normal distributed in 2015. ANOVA analysis indicated that there was significant difference among BILs genotypes，years，and genotypes × years. Based on the last carrot genome resequencing data，a genetic map consisted of 2 027 Bins and 154 776 SNPs was developed，and the total genetic distance was 1 436.433 cM with an average interval of 0.709 cM between Bin markers. Two，four and two QTLs associated with DIF，MSL and SWP were discovered，respectively，with 14.6%–23.8% phenotypic variance. DIF5-1 locus was overlapped with MSL5-1 locus.

Key words: carrot, BIL, date of initial flowering, main stalk length, seed weight, QTL