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Cultivos Tropicales
On-line version ISSN 1819-4087
cultrop vol.40 no.4 La Habana Oct.-Dec. 2019 Epub Dec 01, 2019
Report of new cultivar
“Reysa”, new cuban cultivar of potato
1Instituto Nacional de Ciencias Agrícolas (INCA), carretera San José-Tapaste, km 3½, Gaveta Postal 1, San José de las Lajas, Mayabeque, Cuba. CP 32 700
Thousands of potato cultivars have been reported worldwide. In Cuba, a new potato cultivar was selected and named “Reysa”, originated from a cross between the I-1039 and C-90-154 clones, the progeny consisting of 200 botanical seeds came from the International Potato Center in Peru, they were subjected to selection for 13 years in the Program of Genetic Improvement of the National Institute of Agricultural Sciences. Various morphoagronomic characters were from the hybrid family stage evaluated and as clone 9-12-05. This clone was in the following clonal generations selected for its appropriate field behavior and desired morpho-agronomic characters, its performance ranged between 30 and 40 t ha-1, as well as its good behavior before the main pests and diseases in field conditions.
Key words: improvement; diseases; performance; selection
Origin
In 2005, 200 botanical potato seeds from the crossing made with parents I-1039 and C-90-154 were received at INCA of the International Potato Center (CIP) of Peru. After 13 years (2005-2018) of evaluation and selection of clone 9-12-05, by the Cuban Genetic Improvement Scheme, the new potato cultivar “Reysa” is proposed. (Figure 1)
Description of the characters of cultivar of potato “Reysa”
Number of leaflets: 5
Leaflet shape: Asymmetric
Plant height: 40-45 cm
Presence of anthocyanin in the stem: Yes
Number of stems per seedling: 2-3
Flower color: white
Shape of the leaves: open
Field closure: good (45 days)
Vegetative cycle: short (90 days)
Number of tubers per plant: 6 to 10
Yield per hectare (t ha-1): 30 to 41 (high)
Tuber skin color: yellow
Tuber shape: round
Eye Depth: Medium
Tuber uniformity: medium to large
Appearance: good
Color of tuber mass: yellow
Dry matter (%): 17
Alternaria solani: resistant (grade 3 in field conditions) on the 9 degree scale
Phytophthora infestans: moderately resistant (25 % of the foliage affected in field conditions)
Streptomyces scabies: resistant (grade 1) on the 6 degree scale
Virus PLRV: tolerant (0.5 affected plants in field conditions)
Table 1 shows the yield per hectare and number of tubers obtained during eight agricultural campaigns.
Received: April 02, 2019; Accepted: October 22, 2019