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ASSESSMENT OF SHALLOT COLLECTION ACCESSIONS IN BREEDING FOR YIELD CAPACITY

ASSESSMENT OF SHALLOT COLLECTION ACCESSIONS IN BREEDING FOR YIELD CAPACITY

Institution

Institute of Vegetables and Melons of NAAS

Section

SOURCES AND DONORS

Abstract

Goal. To evaluation of the shallot gene pool for bulb yield and its components, resistance to viral diseases and to select the most valuable accessions for breeding programs.

Results and Discussion. The article presents the results of evaluating 25 shallot accessions for yield and resistance to viral diseases. Five accessions with very high bulb yields (> 135% related to the standard) were selected from the following regions of Ukraine (from the Dnipropetrovska region - D-135 (13.1 t/ha); from the Poltavska region - D-127 (13.9 t/ha); from the Kharkivska region - D-15 (14.0 t/ha), D-34 (14.9 t/ha)) and from the Netherlands (Bonilla (15.9 t/ha). Accessions with high yields (116 - 135% related to the standard) were from the Dnipropetrovska region (D-136 (11.2 t/ha), varieties Olviia (12.3 t/ha) and Kushchyovka Kharkovskaya (12.6 t/ha). Ten accessions were the best in terms of bulb weight, exceeding the standard by 3.0 - 8.3 g:- D-33 (14.2 g), Olviia (14.5 g), D-4 (14.7 g), D- 133 (15.1 g), D-137 (15.2 g), D-130 (15.7 g), D-127 (15.9 g), D-15 (16.6 g), D- 34 (18.3 g), and Bonilla (19.5 g). Seven accessions were noticeable for the bulb number per bulb stem: from the Dnipropetrovska region (D-136 (6.1 bulbs), D-123 (7.0 bulbs), D-124 (7.4 bulbs), D-135 (7.4 bulbs), D-137 (6.4 bulbs), and D-129 (8.0 bulbs)) and from the Netherlands (Bonilla (6.1 bulbs). The following accessions were distinguished by resistance to viral diseases (onion yellow dwarf and mosaic) as sources for breeding: with very high resistance (9 points) - D-120 from Russia, 12 accessions with high resistance (7 points) from Ukraine (D- 4, D-26, D-136, D-125, D-127, D-133, D-130, D-123, D-126, D-137, and D-140) and Bonilla from the Netherlands. Accessions D-127 (Poltavska region), D-137 (Dnipropetrovska region), D-34 and D-15 (Kharkivska region), Bonilla (Netherlands) with a set of traits are of practical interest for breeding.

Conclusions. Having studied 25 shallot collection accessions in 2016 – 2018, we distinguished the following accessions: by bulb yield - 8 accessions (11.7 - 15.9 t/ha), by bulb weight - 10 accessions (14.2 - 18.3 g), by the bulb number per bulb stem - 7 accessions (6.1 – 8.0 bulbs), by resistance to viral diseases - 13 accessions (7 – 9 points), by a set of valuable economic traits – 5 accessions.

Keywords

shallot, collection, accessions, yield, standard, bulb