Due to unfavourable environment, climatic conditions
Nomads always moving from one place to another
Then take over other countries to get resources
The modern Bulgarians are mostly the descendants of the Slavic-speaking people who lived there before.
The Slavs had previously assimilated the local Thracian, Dacian and Macedonian peoples.
The main ethnic elements which blended in to produce the modern Bulgarian ethnicity are:

由于不利的环境、气候条件,游牧民族总是从一个地方搬到另一个地方,然后占领其他国家以获得资源。
现代保加利亚人大多是以前居住在那里的讲斯拉夫语的人的后代。斯拉夫人之前已经同化了当地的色雷斯人、达契亚人和马其顿人。
融合成现代保加利亚民族的主要民族元素是：

1，Ancient Macedons，they were northern Greeks. （ E-V13 and J2）
E1b-V13 is the first Y haplogroup among Bulgarians with 23%, this haplogroup is native and dominant in Balkan region, its a branch of macrohaplgeoup E-M78 which born and still dominant in Egypt and other regions of the Middle East and North Africa
E1b-V13 ancestors most probably entered Balkans through Asia minor during Neolithic migration, a migration not only bring E1b1b but also brought other haplogroups such as J2 which reach 11% in Bulgaria and J1 5% and G 5%.

1，古代马其顿人，他们是北希腊人。（E-V13和J2）。
E1b-V13是保加利亚人中的第一大Y族单倍群，占23%，这个单倍群是巴尔干地区本土的最主要的族群，它是大单倍群E-M78的一个分支，而E-M78诞生于埃及、北非和中东的部分地区，且至今都是这些地区最主要的族群。
E1b-V13的祖先很可能是在新石器时代通过小亚细亚移民进入巴尔干地区的，这种移民不仅带来了E1b，而且还带来了其他的单倍群，如J2，J2族群在保加利亚达到11%，J族群是1 5%，G 族群是5%。

2，Thracians – a native ancient Balkan Indo-European people, from whom cultural and ethnic elements were retained
Their dominant haplogroup R1b-M269

2，色雷斯人—— 一个本土的古老的巴尔干印欧人，他们的文化和民族元素得以很好的保存。
他们主要的单倍群是R1b-M269

3，Early Slavs – an Indo-European group of tribes who migrated from Eastern Europe into the Balkans in the period of 6th–7th centuries CE and imposed their language and culture on the local Thracian, Roman and Greek communities.
Their dominant haplogroup R-Z282 (R1a1ab1) and I2a1b

3，早期斯拉夫人—— 一个印欧语系的部落群体，在公元6-7世纪期间从东欧迁移到巴尔干地区，并在当地的色雷斯、罗马和希腊社区强制推行自己的语言和文化。
他们主要的单倍群是R-Z282（R1a1ab1）和I2a1b

4，Turkic people– semi-nomadic Turkic tribes from Central Asia who arrived in the 7th century CE, federated with the local Slavic and Slavicized populations, organized the early medi Bulgarian statehood and bequeathed their ethnonym to the modern Bulgarian ethnicity
Their dominant haplogroup NOCQ+Rz93（R1a1a1b2）
Approximately only 2.3% of Bulgarian genes originate in Central Asia, with admixture peaking in the 9th century CE
Therefore, modern Bulgarians have nothing to do with Turkic-Mongols

4，突厥人—— 来自中亚的半游牧突厥部落，他们在公元7世纪到达这里，并与当地的斯拉夫和斯拉夫化人口联合，创建了中世纪早期的保加利亚国家，并将他们的民族称呼留给了现代的保加利亚人。
他们主要的单倍群是NOCQ+Rz93（R1a1a1b2）。
大约只有2.3%的保加利亚人的基因来源于中亚，公元9世纪时民族交流达到高峰。
因此，现代保加利亚人与突厥-蒙古人毫无关系。

Bulgars are Turkic people they’re different form Mongols .

保加利亚人是突厥人，他们与蒙古人不同。