In:
PLOS Genetics, Public Library of Science (PLoS), Vol. 18, No. 12 ( 2022-12-7), p. e1010513-
Abstract:
Walnut ( Juglans ) species are economically important hardwood trees cultivated worldwide for both edible nuts and high-quality wood. Broad-scale assessments of species diversity, evolutionary history, and domestication are needed to improve walnut breeding. In this study, we sequenced 309 walnut accessions from around the world, including 55 Juglans relatives, 98 wild Persian walnuts ( J . regia ), 70 J . regia landraces, and 86 J . regia cultivars. The phylogenetic tree indicated that J . regia samples (section Dioscaryon ) were monophyletic within Juglans . The core areas of genetic diversity of J . regia germplasm were southwestern China and southern Asia near the Qinghai-Tibet Plateau and the Himalayas, and the uplift of the Himalayas was speculated to be the main factor leading to the current population dynamics of Persian walnut. The pattern of genomic variation in terms of nucleotide diversity, linkage disequilibrium, single nucleotide polymorphisms, and insertions/deletions revealed the domestication and selection footprints in Persian walnut. Selective sweep analysis, GWAS, and expression analysis further identified two transcription factors, JrbHLH and JrMYB6 , that influence the thickness of the nut diaphragm as loci under selection during domestication. Our results elucidate the domestication and selection footprints in Persian walnuts and provide a valuable resource for the genomics-assisted breeding of this important crop.
Type of Medium:
Online Resource
ISSN:
1553-7404
DOI:
10.1371/journal.pgen.1010513
DOI:
10.1371/journal.pgen.1010513.g001
DOI:
10.1371/journal.pgen.1010513.g002
DOI:
10.1371/journal.pgen.1010513.g003
DOI:
10.1371/journal.pgen.1010513.g004
DOI:
10.1371/journal.pgen.1010513.t001
DOI:
10.1371/journal.pgen.1010513.t002
DOI:
10.1371/journal.pgen.1010513.s001
DOI:
10.1371/journal.pgen.1010513.s002
DOI:
10.1371/journal.pgen.1010513.s003
DOI:
10.1371/journal.pgen.1010513.s004
DOI:
10.1371/journal.pgen.1010513.s005
DOI:
10.1371/journal.pgen.1010513.s006
DOI:
10.1371/journal.pgen.1010513.s007
DOI:
10.1371/journal.pgen.1010513.s008
DOI:
10.1371/journal.pgen.1010513.s009
DOI:
10.1371/journal.pgen.1010513.s010
DOI:
10.1371/journal.pgen.1010513.s011
DOI:
10.1371/journal.pgen.1010513.s012
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2186725-2
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