DEVELOPMENT OF HYBRIDS CLONES OF ANDIGENA POTATOES RESISTANT TO VIRUS

Abstract

Using 19 clones F₁ from diallel crosses in design 3 and from open-pollinated of the native cultivated potato species Solanum tuberosum subsp. andigena with field resistance to virus: 16 to one virus and 3 to two virus,  it was proposed to develop an offspring F₃ with greater frequency of resistance genes to two or more virus, through simple recurrent selection based on the progeny test with ELISA. For adverse circumstances such proposition was not tested, and the investigation was reduced to the evaluation of the durability of the field resistance to specific virus and the yield of the clones F₁. It was found that 15 clones presented a durability of the 5year-old field resistance to one and two of the virus: PVX, APMV, APLV and PLRV; one clone with resistance to PVX and APLV only maintained the resistance to PVX, and 3 clones lost his resistance to APMV and PVY. Five clones with field resistance to one of the virus: PVX and APMV, and one clone with resistance to two virus: APMV and APLV had an average yield in 3 years, of more than 0,7 kg, by plant with a smaller standard deviation to 0,35 Kg, by plant.