Chromosomal loci important for cotyledon opening under UV-B in Arabidopsis thaliana

BMC Plant Biology

Table 1 Genomic Loci for Canalization

ID	Chromosome	Marker Interval	QTL Position in cM	QTL Position Range in cM	High-Effect Allele	QTL Pvalue	h²of QTLs	Comparison to cotyledon opening QTL
Bay x Sha population¹
S.BS3_10	3	ATHCHIB2-MSAT3.19	10.8	4 - 17.8	Bay	P = 6.9 × 10^-4	0.016	Same locus; higher variation allele has lower effect on opening.
Ler x Col population²
S.LCo2_45	2	C2_074-C2_075	45.6	41 - 54				Locus is the same or nearby (intervals overlap), has significant UV-B variation effect but no additive main effect. Ler allele median variance is high in +UV-B round 1 (P = 0.0039), and Ler allele median variance is low in -UV-B round 2 (P = 0.016).
S.Lco4_57	4	C4_089-C4_090	57.1	55 - 58	Col	P = 3.5 × 10^-5	0.043	New locus, no UV-B-specific effect.

¹BayxSha QTL variance components: Vg/Vp = 0.016 Ve/Vp = 0.1675 Vge/Vp = 0.014 Vr/Vp = 0.864*
²LerxCol QTL variance components: Vg/Vp = 0.05 Ve/Vp = 0.266 Vge/Vp = 0.0744 Vr/Vp = 0.6094*
*Vg is variance of genetic main effects, Vp is phenotypic variance, Ve is environmental (UV-B) effects, Vge is variance of genotype-by-environment interaction effects, Vr is residual variance.

ISSN: 1471-2229