BRS Paranoá: carrot for organic production systems

ABSTRACT ‘BRS Paranoá’ was obtained by the carrot breeding program of Embrapa Hortaliças, aiming to obtain a cultivar adapted to most carrot-producing regions in an organic system. It was developed through selection of half-sib progenies and validated in Brazil. ‘BRS Paranoá’ is indicated for sowing in the spring/summer seasons especially because it displays high resistance to leaf blight caused by the fungal and bacterial association (Alternaria dauci, Cercospora carotae, and Xanthomonas hortorum pv. carotae) with defoliation between 20 to 25% at 100 days after planting (DAP), eliminating the need to control this disease with chemical pesticides. In addition, it shows high production stability and an outstanding production exceeding 32 t ha-1. ‘BRS Paranoá’ is an early maturity cultivar, and the harvest can be carried out from 85 DAP when the commercial roots range from 16 to 22 cm, 3 cm diameter, intense orange color, cylindrical shape, and no external or internal physiological defects. The postharvest quality was evaluated and the titratable acidity found was 0.20%, 6.9oBrix soluble solids, 78.40 µg g-1 total carotenoids, and 22.69 µg g-1 ß-carotene (provitamin A). ‘BRS Paranoá’ was registered and protected by the Ministry of Agriculture, Livestock and Food Supply and its seeds have been marketed by the main vegetable seeds companies in Brazil.

摘要 品种‘BRS Paranoá’由巴西农牧业研究院蔬菜研究所（Embrapa Hortaliças）胡萝卜育种项目培育而成，旨在选育出适配有机种植体系下多数胡萝卜主产区的栽培品种。该品种通过半同胞家系选育获得，并在巴西境内完成品种验证。‘BRS Paranoá’适宜春/夏季播种，其对由真菌与细菌复合侵染引发的叶枯病具有高抗性，致病菌涵盖胡萝卜链格孢（Alternaria dauci）、胡萝卜尾孢菌（Cercospora carotae）及胡萝卜黄单胞菌胡萝卜致病变种（Xanthomonas hortorum pv. carotae），播种后100天（DAP，Days After Planting，播种后天数）时落叶率为20%~25%，无需使用化学农药防控该病害。此外，该品种产量稳定性优异，鲜根产量可突破32吨/公顷。‘BRS Paranoá’为早熟品种，可于播种后85天（DAP）启动采收，其商品根长16~22厘米、直径3厘米，色泽浓橙、呈圆柱形，无外部或内部生理缺陷。经采后品质测定，该品种可滴定酸度为0.20%，可溶性固形物含量为6.9白利度（°Brix），总类胡萝卜素含量为78.40微克/克，β-胡萝卜素（维生素A原）含量为22.69微克/克。‘BRS Paranoá’已由巴西农业、畜牧业与食品供应部（Ministry of Agriculture, Livestock and Food Supply）登记并获得品种权保护，其种子已由巴西多家主流蔬菜种子企业推广销售。