Fig. 4
From: A new allele of the Brachytic2 gene in maize can efficiently modify plant architecture
Comparative genomic analysis of maize Br2 locus. a Dot plot of highly conserved genes on maize chromosome 1 from 197.5 to 207.5 Mb and sorghum chromosome 7 from 50 to 60 Mb; blue and red dots represent highly conserved and Br2 genes, respectively. b QTL mapping revealed a major QTL of plant height corresponding to the sorghum dw3 locus on sorghum chromosome 7; the Br2 gene was immediately under the QTL peak. Red dashed line represents the threshold (P < 0.05). c Maize qpa1 contained a 241-bp deletion in the fifth exon, whereas sorghum dw3 harbored an over 800-bp insertion in the similar position as that of maize qpa1 allele. Orange and blue bars signify exons; orange and blue lines indicate introns. Triangles represent deletion and insertion. Two ABC transporter type I transmembrane (119–443 aa and 787–1107 aa) and two P-loop NTPase (455–701 aa and 1123–1359 aa) domains are shown on the bars. d Both br2 gene in maize (qpa1) and sorghum (dw3) controlled the elongation of the internode of the stalk. The RIL plants with wild-type Br2 gene in maize and sorghum are shown as controls. Scale bar, 20 cm. e Allele frequencies of maize qpa1 and sorghum dw3 (Color figure online)
