Tg. Berke et Tr. Rocheford, QUANTITATIVE TRAIT LOCI FOR FLOWERING, PLANT AND EAR HEIGHT, AND KERNEL TRAITS IN MAIZE, Crop science, 35(6), 1995, pp. 1542-1549
The inheritance of qualitative traits is not well understood. A study
was conducted to determine the number and chromosomal locations of qua
ntitative trait loci (QTL) controlling male anthesis date; plant and e
ar height; kernel weight; and kernel protein, oil, and starch concentr
ation in maize (zea mays L.). Two hundred S-1 lines were derived from
a single F-1 plant a cross of Illinois High Oil (IHO) by Illinois Low
Oil (Early Maturity) [ILO(EM)]. Restriction fragment length polymorphi
sm (RFLP) analysis was performance to determine RFLP genotypes of the
200 S-1 families at 80 polymorphic loci spaced on average 24 centimorg
ans throughout the genome. The 200 S-1 families were measured for phen
otypic traits in replicated field trials during 1992 and 1993. Analysi
s of variance detected significant (P < 0.05) associations between sev
eral RFLP loci and each phenotypic trait. a total of 16 marker loci cl
ustered in eight chromosomal regions were significant associated with
male anthesis date, 18 marker loci clustered in 11 regions were signif
icantly associated with plant height, 14 marker loci clustered in nine
regions were significantly associated with kernel weight, 16 marker l
oci clustered in eight regions were associated with protein concentrat
ion, 31 marker loci clustered in 11 regions were associated with oil c
oncentration, and 28 marker loci clustered in 13 regions were associat
ed with starch concentration. A number of QTL were detected in chromos
omal regions where known gene loci biological relevance are located.