Siberian crab apple

fruit

Malus × robusta ( Carrière ) Rehder or Siberian crabapple is a natural wild apple hybrid between thewild apple species Malus baccata (L.) Borkh. and Malus prunifolia ( Willd. ) Borkh. from Siberia and Central Asia .

Malus × robusta 5 is an important genetic resource for breeding new apple varieties , e.g. B. as a source of the fire blight resistance gene . The lineage was found and cultivated in the Beijing area. It was introduced to the United States in 1927. It is occasionally wild in North America.

description

Appearance and leaf

Malus × robusta is a deciduous, small to medium-sized tree with an upright to broad - growing crown . The branches can overhang at their ends. The moderately to very shiny bark of the twigs is moderately to not hairy on the top ( indument ). The size of the elliptical lenticels can vary. The buds end pointed or rounded.

The alternate leaves are arranged in a petiole and a leaf blade. The simple leaf blade is elliptical with a length of 8 to 11 centimeters with a pointed upper end. The leaf margin is sawn. The underside of the leaf is slightly hairy to glabrous.

Inflorescence and flower

The flowering period extends from mid-April to early May. The umbelliferous inflorescence contains three to eight flowers, it can sit on both short and long shoots. The flower stalk is hairy. The hermaphrodite flowers have a diameter of 3 to 5 centimeters and are radially symmetrical and five-fold with a double flower envelope . The five free, white to pink petals can touch and are notched. There are four to five free pens available.

fruit

The relatively long stalked fruits of Malus × robusta are 2 to 3.5 centimeters long and are red to yellow, sometimes also bluish, when ripe.

literature

Thomas Wöhner, Mohammed Eldin Ali, Andreas Peil: Wild apple: Malus × robusta . In: JKI data sheets . No. 3 , 2012, doi : 10.5073 / jkidos.2012.003 ( PDF ). (Section description)
Plant profile of Malus × robusta (Carrière) Rehder at USDA .

Individual evidence

↑ Johannes Fahrentrapp, Giovanni AL Broggini, Markus Kellerhals, Andreas Peil, Klaus Richter, Elena Zini, Cesare Gessler: A candidate gene for fire blight resistance in Malus × robusta 5 is coding for a CC – NBS – LRR . In: Tree Genetics & Genomes . tape 9 , no. 1 , February 2013, p. 237-251 , doi : 10.1007 / s11295-012-0550-3 ( PDF ).
↑ Henryk Flachowski, Andreas Peil, Magda-Viola Hanke, Giovanni Broggini: First Feuerbrandresistenzgen isolated . In: fruit growing . No. 6 , 2014, p. 325-328 .

Web links

Commons : Malus × robusta - collection of images, videos and audio files

[Fahrentrapp2013-1] Johannes Fahrentrapp, Giovanni AL Broggini, Markus Kellerhals, Andreas Peil, Klaus Richter, Elena Zini, Cesare Gessler: A candidate gene for fire blight resistance in Malus × robusta 5 is coding for a CC – NBS – LRR . In: Tree Genetics & Genomes . tape 9 , no. 1 , February 2013, p. 237-251 , doi : 10.1007 / s11295-012-0550-3 ( PDF ).

[Flachowski2014-2] Henryk Flachowski, Andreas Peil, Magda-Viola Hanke, Giovanni Broggini: First Feuerbrandresistenzgen isolated . In: fruit growing . No. 6 , 2014, p. 325-328 .