BRANCA
ActiveCastanea sativa Mill. · Sweet chestnut
ES
3 records
Variety traits
Male Sterility (CMS) — Sweet Chestnut
Castanea sativa Mill.
Male sterility in sweet chestnut manifests as morphological degeneration of stamens and anthers, preventing self-pollination. The trait is expressed through a reduction in the number and size of stamens, anther abortion, and the absence of viable pollen.
In the reference 6 varieties crop Sweet chestnut, where this is mentioned in the description.
In cultivated varieties of sweet chestnut, male sterility is characterized by a significant reduction in stamen length, their deformation, or anther abortion. Research records a sharp decrease in the number of stamens per flower, often amounting to approximately 2.6 units compared to 9.5–11.9 in fertile forms. Microscopic analysis shows changes in the structure of the epidermal cells of the anthers and the absence of pollen grain production.
The trait has a direct impact on the tree's reproductive strategy, preventing inefficient self-pollination. In orchards, forms exhibiting male sterility may demonstrate higher fruit set by avoiding sexual interference, provided that pollinator trees are present to ensure cross-pollination.
General information about the subject — on the page Cytoplasmic Male Sterility (CMS).
Sources5
Varieties of Sweet chestnut mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Pellegrine
ActiveCastanea sativa Mill. · Sweet chestnut
FR
2 records
Marsol
ActiveCastanea sativa Mill. · Sweet chestnut
FR
3 records