Why are there so many types of apples? - Theresa Doud

1,068,661 views ・ 2016-09-22

TED-Ed


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譯者: Ashley WU 審譯者: Helen Chang
當你走進超市的時候, 你是否想過:
00:07
Have you ever walked into a grocery store
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00:09
and wondered where all those variety of apples came from?
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這麼多不同種類的蘋果 是從哪兒來的?
00:12
You might find SnapDragon,
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你能在超市找到各種蘋果, 例如:驍龍、
00:14
Pixie Crunch,
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嘎吱小精靈、
00:15
Cosmic Crisp,
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星際脆、
00:16
Jazz,
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爵士,
00:17
or Ambrosia
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或是安波爾西亞。
00:18
next to the more familiar Red Delicious and Granny Smith.
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它們就擺在常見的五爪蘋果, 以及俗稱「史密斯奶奶」的青蘋果旁邊。
00:22
These delightfully descriptive names
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以上這些討人喜歡的稱呼,
00:24
belong to just a handful of the over 7,500 apple varieties in the world.
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僅僅是世界上 7500 多種蘋果 當中的一小部分。
00:30
This huge diversity exists largely because of humanity's efforts to bear new fruit.
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會有這麼多種蘋果的主要原因是: 人們付出了許多努力,來培育新的品種。
00:36
Fruit breeding is a way to fulfill the expectations of farmers and consumers
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對於追求著各種特色蘋果的 果農和消費者,
00:41
who seek specific qualities in an apple.
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能滿足他們期望的方式, 就是「果樹育種」。
一方面,果農希望蘋果 具有抗病能力和易保存的特質。
00:44
On the one hand, farmers may want them to be disease-resistant and to store well.
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00:49
On the other, consumers are swayed by appearance, taste, and novelty.
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另一方面,消費者注重的是 蘋果的外觀,口味和新穎性。
所以,培育者必須考慮到 各式各樣的需求,
00:54
So, breeders have to consider everything
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00:56
from how well apples grow in certain climates
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除了關注蘋果 在特定環境下的生長狀況,
00:59
to their color, taste, and size.
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還要關注它的顏色、口味和尺寸。
01:02
And sometimes finding the perfect fit means breeding something new.
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而且有時候,尋求完美的蘋果 意味著要培育出全新的品種。
01:07
To create apples with desirable characteristics,
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為了讓培育出的蘋果 能擁有令人滿意的特質,
01:11
breeders first need to find parent apples that carry those characteristics.
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培育者需要先找到擁有 這些優秀特性的蘋果作為「親代」。
01:15
Once the parents have been selected,
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培育者選出親代蘋果之後,
01:17
they have to wait until the trees bloom in the spring.
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他們還必須等到春天果樹開花。
01:20
The breeder takes the pollen from one bloom, called the father,
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培育者會從果樹的花朵採集花粉,
這一棵親代果樹稱為「父本」;
01:23
and transfers it by hand to the other parent bloom, called the mother,
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並且用人工將花粉轉移到 另一棵樹的花朵中,
這一棵親代果樹稱為「母本」;
01:28
through a process called cross-pollination.
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然後再進行一系列 稱為「異花授粉」的操作過程。
當母本植株上長出蘋果後,
01:31
Once the mother bloom turns into an apple,
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01:33
the seeds are collected and then planted.
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再收集蘋果的種子並種植。
01:36
It takes about five years for these seeds to grow into trees that produce apples,
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等這些種子長成果樹再到結成果實 大概會花費五年時間,
01:40
but because of the way traits are inherited,
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但是由於遺傳的多樣性,
01:43
all of the seedlings produced will have different sets of genes
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所有子代的幼苗都會有不同的基因組
01:46
and characteristics.
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和特徵。
這就意味著,為了能使蘋果 擁有令人滿意的特性,
01:48
This means that to achieve a desired quality,
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01:50
it takes a lot of offspring,
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需要培育大量的幼苗,
這需要培育者具有相當大的耐心。
01:52
not to mention patience on the breeder's part.
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當幼苗長出擁有理想特質的蘋果之後,
01:55
When a seedling does bear fruit with the desired qualities,
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01:58
it's selected for further evaluation.
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這些蘋果將被挑選出來 作進一步的檢測篩選。
02:01
Of the original crossed seedlings,
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經過雜交產生的子代幼苗,
02:04
about one in every 5,000 makes it to this prestigious stage.
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只有五千分之一的機率 能到達光榮的最終篩選階段。
02:08
They're then sent to new farms
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最終選出的幼苗被送往新的農場,
02:10
where breeders can assess how various climates and soil types
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培育者能在那裡進一步分析
不同的氣候環境和土壤類型 對該植株生長的影響。
02:14
affect the plant's growth.
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02:16
The fruit of the seedling and its many clones
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幼苗長成的果實 以及它的許多複製體
02:18
must then be collected and sampled to ensure consistency.
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會被進一步收集和採樣, 以檢驗其優良特質的穩定性。
培育者會對蘋果的 45 個特徵進行研究,
02:22
Breeders study about 45 traits in an apple,
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02:25
like the texture and firmness of the flesh,
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例如果實成熟後的質感和脆度、
02:27
when it ripens,
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02:28
how sugary its juice is,
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果汁的含糖度,
02:30
and how long it stays fresh.
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以及果實的保鮮時間。
02:32
Over several years, they weed out all the bad apples,
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經過數年的研究和檢測, 培育者將所有的劣質蘋果淘汰掉,
02:36
selecting only those whose fruits are the best.
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只留下擁有最棒果實的植株。
這些最終留下的優秀植株, 便正式成為一個栽培品種,
02:40
These exclusive plants officially form the cultivar,
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02:43
or new apple variety.
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或者是一個新的蘋果品種。
02:46
To ensure an exact copy of this cultivar,
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為了確保該品種植株的純種性,
02:48
all apple trees must be grafted from the original seedling.
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所有蘋果樹上的嫁接枝條 都必須來自最初的那株幼苗。
02:52
Branches, called scion wood,
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從最初的蘋果樹上砍下的樹枝, 被稱作為「接穗」,
02:55
are cut from the original tree and grown to generate more scion wood.
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接穗會被種植起來, 以提供更多的接穗。
02:59
Segments of these trees are then grafted onto root stalk -
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然後這些接穗樹枝 會被嫁接到砧木上;
03:02
that's the lower section of another tree
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砧木指的是從另一品種 所選出的樹體根段,
03:04
that's been chosen from a different cultivar
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作為砧木的蘋果樹需要有
03:06
for its superior roots and growing ability.
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發達的根系和卓越的生長力。
最後,接穗和砧木會生長成為
03:10
Finally, this fusion creates a new apple tree
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03:12
with the desired qualities.
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具有優秀特性的新蘋果樹。
03:15
Each new plant takes up to four years
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每株新的蘋果樹需要花費四年時間
03:17
before it starts producing the fruit we eat.
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才能開始產出我們最終吃到的果實。
03:20
Apple breeding may be a difficult art, but it's accessible to all:
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蘋果的培育雖然是種充滿艱辛的藝術,
但是培育環節可以分工給:
03:24
universities,
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大學、
03:26
companies,
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公司,
03:27
and even individuals can create new cultivars.
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甚至是有能力培育植株的個人。
03:30
But to fully own an apple, the breeder faces a final challenge -
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但是在完全擁有某種蘋果之前, 培育者還面臨著一個最終的挑戰:
03:34
naming the fruit.
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給新的蘋果品種起個名字。
03:36
After a cultivar is patented,
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在新的蘋果植株獲得專利後,
03:38
a breeder chooses a name for its trademark.
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培育者會為該專利的商標 挑選一個名字。
03:41
That final step grants them long-lasting rights over the apple and its clones.
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這關鍵的最後一步,保障培育者們 擁有育出蘋果與其複製的長期權利。
03:46
That name must be completely original,
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這個名字必須是完全原創的,
03:48
and the catchier, the better, of course.
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當然是越容易讓人記住越好。
03:51
With over 7,500 varieties and counting,
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目前已有超過 7500 種蘋果, 並且這個數字還在不斷增加,
03:55
that's why we have apples called Pink Lady,
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這就是為什麼我們有蘋果 被叫做紅粉佳人、
03:57
Sweet Tango,
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甜蜜探戈、
奇酷,
03:59
Kiku,
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和永遠脆脆。
04:00
and EverCrisp.
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04:01
The more we work with nature's bounty to breed new cultivars,
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我們培育出愈多新的品種,
04:05
the more creative and delectable these names will become.
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這些新品種的名字將會變得 越富有創造性並且討人喜歡。
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