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在栽培日中CMS-PET1细胞型的起源:一个新的洞察力

Kirill Azarin¹, Alexander Usatov¹, Alexandra Kasianova¹

¹Southern Federal University, 344006 Rostov-on-Don, Russia.

|September 15, 2023

概括

太阳花的细胞质男性不育性 (CMS),特别是PET1类型,在野生Helianthus annuus种群中自然存在. 它在栽培的向日中的出现与杂交期间的生育恢复基因的损失有关.

科学领域:

植物遗传学植物遗传学
进化生物学是进化的生物学.
农业科学农业科学

背景情况:

细胞质男性不育性 (CMS) 的PET1类型对于商业向日杂交生产至关重要.
以前,人们认为CMS-PET1仅在跨物种杂交过程中产生的,而在野生向日中则不存在.

研究的目的:

调查CMS-PET1细胞型在野生向日种群中的起源和流行情况.
确定与CMS-PET1相关的orfH522基因是否存在于野生的Helianthus annuus和Helianthus petiolaris中.

主要方法:

野生向日加入的orfH522开放阅读框架的基因组分析.
对1089个野生日 (H. annuus) 和H. petiolaris的全基因组数据分析.

主要成果:

与CMS-PET1相关的orfH522基因在线粒体atpA基因的野生H. annuus 3'-侧翼区域中被确定.
在野生H. annuus种群中,CMS-orfH522发生在3.58%,在野生H. petiolaris种群中发生在1.26%.
证实PET1-CMS是H. annuus.中的一种天然细胞型.

结论:

在培养的向日中,PET1-CMS表型是由于在跨物种杂交过程中丧失了生育恢复基因而产生的,而不是新的创造.
这些发现澄清了野生的向日中的细胞质和核入侵模式,并支持进化研究.

关键词:

细胞质男性不育性年 (Helianthus annuus) 是一个年长的.线粒体基因组是指线粒体的基因组.有关Rf基因的研究.或fH52222 的情况.

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