In autumn I sowed 100 mandarin seed. I’ve just potted up the resultant seedlings – all 170 of them! How is this possible? Most flowering plants (angiosperms) generate a single embryo per seed following pollination. Seed results from sexual reproduction and the offspring have some genetic variation. But some cultivars of citrus generate multiple embryos in an individual seed without pollination – they are polyembryonic seed and they’re a result of asexual reproduction. Polyembryonic seed go on to produce multiple seedlings, and you can carefully separate and pot these seedlings individually. My most prolific seed generated five seedlings, but quite a few produced two to three seedlings each. Back in 1719, Linnaeus observed and defined apomixis, a natural cloning process involving polyembryony. Apart from sheer numbers, the other advantage of apomixis to the gardener is the offspring are genetically identical – true clones – of their mother. I know that the seedlings of my heritage Australian ‘Parramatta Sweets‘ mandarin will mature – with less fuss and effort than modern mandarins – to produce an equally heavy crop of sweet, juicy fruit enclosed by a rind that separates perfectly from the fruit. And I have enough offspring to create a commercial orchard. If you’re interested in delving deeper, read on…
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Hi Jerry – well Karen and I loved your Parramatta Sweets mandarin marmalade we bought at your recent Open Garden Day – Is there any chance of buying a seedling for Parramatta Sweets from you? or even a fruit? It is certainly much more robust than the plants on offer at nurseries.
Sorry to hear of Colins passing
It was my plan to sell the seedlings raised from the fruit that made the marmalade as a package. But I needed an extra two growing weeks to achieve it.
Give me your address and I’ll pop one into a mail tube later this spring when they’ve established.
My friend Noel (who had a sales area during my open day) has bagged the lot. I’m very happy for him to sell them – his home and garden were destroyed by the floods – and any profit from their sale is my contribution to him rebuilding his life.
Love the marmalade !
Hi Jerry, Last summer i fell in love with Achacha and planted lots of seeds. Most seeds came up and one was polyembryonic giving me 3 plants. I’m hoping these will be clones of the parent fruit and they will be the ones for my garden.
Gerry Schouten, Gladtone QLD (soon moving to Valdora Sunshine Coast.)
I would definitely hold on to those and determine their merits.
Did you split the multiple plants for potting? From your pics it doesn’t look like you could get enough root for each little plant. Wondering how the multiples would grow together in the long run?
Can I buy some Parramatta Sweet seedlings . I live in Murwillumbah NSW.