Peridermal fruit skin formation in Actinidia sp. (kiwifruit) is associated with genetic loci controlling russeting and cuticle formation

BMC Plant Biology

Sean M. Bulley¹  Alastair Currie²  David Chagné³  Jibran Tahir³  Robert J. Schaffer⁴  Elena Hilario⁵  Ria Rebstock⁵  Ben Warren⁵  Ian C. Hallett⁵  Nikolai Macnee⁶ 

[1] PFR, 412 No 1 Road RD 2, 3182, Te Puke, New Zealand;PFR, 55 Old Mill Road, RD3, 7198, Motueka, New Zealand;PFR, Private Bag 11600, 4442, Palmerston North, New Zealand;School of Biological Science, The University of Auckland, 1146, Auckland, New Zealand;PFR, 55 Old Mill Road, RD3, 7198, Motueka, New Zealand;The New Zealand Institute for Plant and Food Research Ltd. (PFR), Private Bag 92169, 1142, Auckland, New Zealand;The New Zealand Institute for Plant and Food Research Ltd. (PFR), Private Bag 92169, 1142, Auckland, New Zealand;School of Biological Science, The University of Auckland, 1146, Auckland, New Zealand;

关键词: Kiwifruit;    Actinidia;    Pericarp;    Periderm;    Russet;    Cuticle;   

DOI  :  10.1186/s12870-021-03025-2

来源: Springer

【 摘 要 】

BackgroundThe skin (exocarp) of fleshy fruit is hugely diverse across species. Most fruit types have a live epidermal skin covered by a layer of cuticle made up of cutin while a few create an outermost layer of dead cells (peridermal layer).ResultsIn this study we undertook crosses between epidermal and peridermal skinned kiwifruit, and showed that epidermal skin is a semi-dominant trait. Furthermore, backcrossing these epidermal skinned hybrids to a peridermal skinned fruit created a diverse range of phenotypes ranging from epidermal skinned fruit, through fruit with varying degrees of patches of periderm (russeting), to fruit with a complete periderm. Quantitative trait locus (QTL) analysis of this population suggested that periderm formation was associated with four loci. These QTLs were aligned either to ones associated with russet formation on chromosome 19 and 24, or cuticle integrity and coverage located on chromosomes 3, 11 and 24.ConclusionFrom the segregation of skin type and QTL analysis, it appears that skin development in kiwifruit is controlled by two competing factors, cuticle strength and propensity to russet. A strong cuticle will inhibit russeting while a strong propensity to russet can create a continuous dead skinned periderm.

【 授权许可】

CC BY