Useful information

Tubular Lily Hybrids: Late Spring Breeding

Tubular hybrids belonging to the VI section of the International Classification of Hybrid Lilies are loved by many growers for their decorative effect, delicate colors, a wide variety of flower shapes and aroma.

Sultry Summer

In Russia, there is a shortage of planting material for lilies of this group. There are varieties of foreign selection on sale, which, unfortunately, are not always stable in our climatic conditions. Cultivars of domestic selection are generally absent or come in very limited quantities. The main reason is that Tubular Lilies have a very low coefficient of vegetative reproduction: in 2-3 years of cultivation, only two bulbs are formed, and the baby is practically not formed.

Although in the GNU VNIIS them. I.V. Michurin practiced the method of clonal micropropagation [2, 5], the main method of breeding new varieties of lilies in our country is the flaking of bulbs [1, 6]. This is the simplest technique that does not require special equipment and special skills. A.V. Otroshko [4], O.A. Sorokopudova [7] recommend removing scales during or immediately after flowering. N.V. Ivanov [1] and M.F. Kireeva [3] believe that this can be done at any time of the year, but the most active formation of bulbs occurs in spring.

Flamingo

In addition, it is enough to simply propagate the lilies by shoots. In this way, it is possible to breed species and varieties of lilies that form adventitious roots [7]. By using both methods, you can get more bulbs and propagate new varieties and hybrids faster.

The aim of our research was to study the possibility of reproduction of Tubular hybrids of lilies by shoots and the effectiveness of late spring squama.

Materials and methods

The experimental work was carried out on the basis of the floriculture laboratory of the State Scientific Institution VNIIS im. I.V. Michurin in 2012–2013

For the experiment, 5 varieties were used ('Aria', 'Sultry Summer', 'Octave', 'Sunny Morning', 'Flamingo'), and three elite seedlings (153-20-4, 153-99-3, 161-103- 4) Tubular hybrids of lilies, created at the State Scientific Institution VNIIS im. I.V. Michurin, as well as the ‘Lerupe’ variety, bred by V.P. Orekhova.

In the second half of May, when the plants reached 40–60 cm, they were dug up, and the stems with adventitious (supra-lucid) roots were twisted from the bulbs. The scales were removed from 5 to 15 pieces, depending on the size of the bulbs. The stems and bulbs were planted in the ground.

The soil under the planted stems was watered abundantly for the first two weeks. Later, watering was reduced, however, trying to keep the soil in a moderately moist state.

The scales were washed and immersed for 30 minutes in a solution of potassium permanganate (KMnO4 - 0.3 g per 1 L of water), then dried, folded into a plastic bag, to which sphagnum was added, and placed in a dark place at room temperature.

The bulbs formed on the scales were counted 10 weeks after separation, and on the stems when they were dug up in September. The number and diameter of the bulbs formed

on one plant.

OctaveElite seedling 153-20-4

Results and discussion

Studies have shown that all studied varieties and elite seedlings of Tubular Hybrids of lilies form bulbs on elongated shoots. However, the highest reproduction rate was in the elite seedling 153-20-4: 18 bulbs per 1 stem. Low productivity (2.6 pcs.) Was noted in the varieties Znoynoe Leto and Solnechnoe Utro (NSR05 - 2.3).

The size of the formed bulbs also varied. The largest (2.5 cm) were in the elite seedling 161-103-4, the smallest (1.42 cm) were in the 'Flamingo' variety (НСР05 - 0.32).

On the scales of all studied varieties, selected and elite seedlings, bulbs were formed. Already 2 weeks after the separation of the scales, small onion rudiments appeared at their base. The count, carried out 10 weeks after the separation, showed that the largest number of bulbs (1.9) was formed on the scales of the 'Hot Summer' variety, the smallest (1.1) - of an elite seedling 153-99-3 (НСР05 - 0.28) ... The sizes of the bulbs differed slightly by cultivars.

The bulbs formed on the shoots were much larger than those on the scales. In the 'Lerupe' and 'Octave' varieties, some were up to 4 cm in diameter. Their size mainly varied from 1.5 to 2.5 cm (on shoots) and from 0.4 to 1.0 cm (on scales).

There was no significant difference in the results (reproduction rate, size of formed bulbs) in late spring and autumn scales. A slightly larger number of bulbs was formed during the autumn removal of scales in the ‘Octava’ and ‘Lerupe’ varieties and the elite seedling 161-103-4.

LerupeBulb formation on the shoot of the Lerupe variety

In conclusion, it should be noted that the reproduction of all studied varieties and elite seedlings of lilies by shoots and scales of bulbs in the late spring period is quite possible. Moreover, the bulbs formed on the shoots are much larger than those formed on the scales. The multiplication factor and the size of the formed bulbs during late spring and autumn scaling did not differ significantly.

Literature

1. Ivanova N.V. The influence of growth regulators on the reproduction of lilies / N.V. Ivanova // Bul. Ch. bot. garden. - 1983. - Issue. 127 .-- S. 62-64.

2. Ivanova, N.V. Microclonal reproduction of Asian hybrids of li-li. / N.V. Ivanova, G.M. Pugacheva // Main results and prospects of scientific research of the Michurin VNIIS: Collection of articles. scientific. tr., / Tambov: publishing house of TSTU, 2001. - Vol. 1 - P.199-203.

3. Kireeva, M.F. Lilies / M.F. Kireeva. –M .: ZAO Fiton +, 2000. - 160 p.

4. Otroshko, A.V. Lilies in the garden / A.V. Otroshko. - Rostov-on-Don, 2012. - 95 p.

5. Pugacheva G.M. Clonal micropropagation of lilies at VNIIS them. I.V. Michurina / G.M. Pugacheva // Innovative foundations for the development of horticulture in Russia: Proceedings of the All-Russian Research Institute of Horticulture named after I.V. Michurin / Ed. Yu.V. Trunov. - Voronezh: Quarta, 2011. - S. 189-193.

6. Sokolova M.A. An effective way of breeding Tubular Hybrids of lilies / M.A. Sokolova, G.M. Pugacheva / Floriculture, 2010. - No. 6. - P. 18-19.

7. Sorokopudova, O.A. Biological features of lilies in Siberia: monograph / O.A. Sorokopudova. - Belgorod: BelGU Publishing House, 2005 .-- 244 p.

Photo by the author

Magazine "Floriculture" No. 2-2015

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