The United States of America, as represented by the Secretary of Agriculture
发明人:
Dardick Christopher D.,Scorza Ralph,Hollender Courtney A.
申请号：
US201514737176
公开号：
US9944940(B2)
申请日:
2015.06.11
申请国别(地区):
美国
年份:
2018
代理人:
Fado John D.`Marks David L.
摘要：
The genetic basis for a recessive dwarf trait (dw) in peach (Prunus persica) was determined. Using a sequencing-based bulk-segregant mapping strategy, dw was positioned on the distal end of peach chromosome 6. At the center of the mapped locus, a SNP leading to a premature stop codon was identified within the coding region of a homolog of the Giberellic Acid (GA) receptor GID1 (GA Insensitive Dwarf 1). Silencing of GID1c in the closely related species Prunus domestica (plum) led to dwarf phenotypes with shortened internodes similar to dw/dw peaches. The degree of GID1c silencing corresponded to the degree of dwarfing. Anatomical expression studies showed that GID1c was highly expressed in all actively growing peach tissues, but more predominant in apical meristems and roots. These data establish that GID1c serves a primary role in the rapid growth and elongation of peach vegetative tissues, thus providing new methods to control tree size without impacting flower or fruit development.
