Discovering candidate genes that regulate resin canal number in Pinus taeda stems by integrating genetic analysis across environments, ages, and populations

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1990. - 205(2015), 2 vom: 23. Jan., Seite 627-41
1. Verfasser:	Westbrook, Jared W (VerfasserIn)
Weitere Verfasser:	Walker, Alejandro R, Neves, Leandro G, Munoz, Patricio, Resende, Marcio F R Jr, Neale, David B, Wegrzyn, Jill L, Huber, Dudley A, Kirst, Matias, Davis, John M, Peter, Gary F
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2015
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, U.S. Gov't, Non-P.H.S. bark beetles biofuel forest trees genomic selection genotype × environment interactions pleiotropy terpene Biofuels Resins, Plant

Beschreibung
Zusammenfassung:	© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust. Genetically improving constitutive resin canal development in Pinus stems may enhance the capacity to synthesize terpenes for bark beetle resistance, chemical feedstocks, and biofuels. To discover genes that potentially regulate axial resin canal number (RCN), single nucleotide polymorphisms (SNPs) in 4027 genes were tested for association with RCN in two growth rings and three environments in a complex pedigree of 520 Pinus taeda individuals (CCLONES). The map locations of associated genes were compared with RCN quantitative trait loci (QTLs) in a (P. taeda × Pinus elliottii) × P. elliottii pseudo-backcross of 345 full-sibs (BC1). Resin canal number was heritable (h(2) ˜ 0.12-0.21) and positively genetically correlated with xylem growth (rg ˜ 0.32-0.72) and oleoresin flow (rg ˜ 0.15-0.51). Sixteen well-supported candidate regulators of RCN were discovered in CCLONES, including genes associated across sites and ages, unidirectionally associated with oleoresin flow and xylem growth, and mapped to RCN QTLs in BC1. Breeding is predicted to increase RCN 11% in one generation and could be accelerated with genomic selection at accuracies of 0.45-0.52 across environments. There is significant genetic variation for RCN in loblolly pine, which can be exploited in breeding for elevated terpene content
Beschreibung:	Date Completed 31.08.2015 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.13074