TY  - JOUR
AU  - Di Vittori, Valerio
AU  - Bitocchi, Elena
AU  - Rodriguez, Monica
AU  - Alseekh, Saleh
AU  - Bellucci, Elisa
AU  - Nanni, Laura
AU  - Gioia, Tania
AU  - Marzario, Stefania
AU  - Logozzo, Giuseppina
AU  - Rossato, Marzia
AU  - De Quattro, Concetta
AU  - Murgia, Maria L
AU  - Ferreira, Juan José
AU  - Campa, Ana
AU  - Xu, Chunming
AU  - Fiorani, Fabio
AU  - Sampathkumar, Arun
AU  - Fröhlich, Anja
AU  - Attene, Giovanna
AU  - Delledonne, Massimo
AU  - Usadel, Björn
AU  - Fernie, Alisdair R
AU  - Rau, Domenico
AU  - Papa, Roberto
TI  - Pod indehiscence in common bean is associated with the fine regulation of PvMYB26
JO  - The journal of experimental botany
VL  - 72
IS  - 5
SN  - 1460-2431
CY  - Oxford
PB  - Oxford Univ. Press
M1  - FZJ-2021-01209
SP  - 1617–1633
PY  - 2021
AB  - In legumes, pod shattering occurs when mature pods dehisce along the sutures, and detachment of the valves promotes seed dispersal. In Phaseolus vulgaris (L)., the major locus qPD5.1-Pv for pod indehiscence was identified recently. We developed a BC4/F4 introgression line population and narrowed the major locus down to a 22.5 kb region. Here, gene expression and a parallel histological analysis of dehiscent and indehiscent pods identified an AtMYB26 orthologue as the best candidate for loss of pod shattering, on a genomic region ~11 kb downstream of the highest associated peak. Based on mapping and expression data, we propose early and fine up-regulation of PvMYB26 in dehiscent pods. Detailed histological analysis establishes that pod indehiscence is associated with the lack of a functional abscission layer in the ventral sheath, and that the key anatomical modifications associated with pod shattering in common bean occur early during pod development. We finally propose that loss of pod shattering in legumes resulted from histological convergent evolution and that it is the result of selection at orthologous loci.In legumes, pod shattering occurs when mature pods dehisce along the sutures, and detachment of the valves promotes seed dispersal. In Phaseolus vulgaris (L)., the major locus qPD5.1-Pv for pod indehiscence was identified recently. We developed a BC4/F4 introgression line population and narrowed the major locus down to a 22.5 kb region. Here, gene expression and a parallel histological analysis of dehiscent and indehiscent pods identified an AtMYB26 orthologue as the best candidate for loss of pod shattering, on a genomic region ~11 kb downstream of the highest associated peak. Based on mapping and expression data, we propose early and fine up-regulation of PvMYB26 in dehiscent pods. Detailed histological analysis establishes that pod indehiscence is associated with the lack of a functional abscission layer in the ventral sheath, and that the key anatomical modifications associated with pod shattering in common bean occur early during pod development. We finally propose that loss of pod shattering in legumes resulted from histological convergent evolution and that it is the result of selection at orthologous loci.
LB  - PUB:(DE-HGF)16
C6  - 33247939
UR  - <Go to ISI:>//WOS:000637289800012
DO  - DOI:10.1093/jxb/eraa553
UR  - https://juser.fz-juelich.de/record/890801
ER  -