Two QTL with near-significant p -values ≤1 × 10 − 5 were located on Chromosome 2, including a Ser/Thr receptor kinase-like protein and a spectrin repeat-containing CHUP1 homolog involved in chloroplast movement and anchoring to the plasma membrane.
Other genes of interest near significance included, on Chromosome 1, a Riboflavin synthase-like gene ( RboS-L ), on Chromosome 2, a Prolyl 4-hydroxylase ( P4H1 ) gene involved in hydroxyproline synthesis, on Chromosome 3, an IAA-Ala Amino Hydrolase ( IAH ) gene involved in yielding IAA from amino acid conjugates, on Chromosome 5, a Guanosine Diphosphatase1 gene ( GDA1 ) involved in transport of GDP-Mannose into the lumen of the Golgi apparatus, on Chromosome 7, a UDP-Glu:UDP-Gal 4-epimerase gene ( UGE5 ), and, on Chromosome 10, a WRKY63-like transcription factor gene (Fig. 4 , Table 3 ).