Evaluation and Inheritance of Crown Gall Resistance in Apple Rootstocks

Relative susceptibility of peach rootstocks to crown gall and Phytophthora root and crown rot in Chile

G. Guzmán, B.A. Latorre, R. Torres, and W.F. Wilcox. 2007. Relative susceptibility of peach rootstocks to crown gall and Phytophthora root and crown rot in Chile. Cien. Inv. Agr. 34(1):31-40. Crown gall (Agrobacterium tumefaciens) and Phytophthora root and crown rot (PRCR), caused by P. cryptogea, are two major limiting factors affecting peach (Prunus persica) production in Chile. At present, N...

Breeding apple proliferation-resistant rootstocks: durability of resistance and pomological evaluation

To develop apple proliferation (AP) resistant rootstocks, a breeding program was initiated in 2001 employing apomictic Malus sieboldii and M. sieboldii-derived hybrids as donors of the resistance trait and mainly standard apple rootstock Malus x domestica cv. M9 as donor of agronomic values. Examination of the experimentally inoculated progeny of seven crossings made in 2001 and 2002 over a per...

Crown Gall Resistance in Accessions of 20 Prunus Species

Crown gall is an important disease of many fruit and nut crops, but little is known about sources of resistance. We screened germplasm from Prunus armeniaca L., P. angustifolia Marsh., P. argentia L., P. avium L., P. besseyi Bailey, P. bokhariensis Schneid., P. brigantica L., P. cerasifera Ehrh., P. cerasus L., P. dulcis (Mill.) D.A. Webb, P. fruiticosa Pall., P. hortulana Bailey, P. insititia ...

RNAi-mediated oncogene silencing confers resistance to crown gall tumorigenesis.

Crown gall disease, caused by the soil bacterium Agrobacterium tumefaciens, results in significant economic losses in perennial crops worldwide. A. tumefaciens is one of the few organisms with a well characterized horizontal gene transfer system, possessing a suite of oncogenes that, when integrated into the plant genome, orchestrate de novo auxin and cytokinin biosynthesis to generate tumors. ...

Rootstocks for Size Control in Apple Trees