X 染色体的非孟德尔传播:机制及其对不同育种系统中性别比例和种群动态的影响。

IF 3.8 3区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Biochemical Society transactions Pub Date : 2024-08-28 DOI:10.1042/BST20231411
Sally Adams, Andre Pires-daSilva
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引用次数: 0

摘要

配子发生过程中性染色体的非孟德尔遗传具有重要意义,可影响性别比例和进化动态。在此,我们将重点研究在精子发生过程中驱动 X 染色体非孟德尔遗传的已知机制及其对不同繁殖系统物种种群动态的影响。在果蝇和小鼠中,针对含Y精子的X连锁驱动因子往往会产生不利影响,从而导致抑制因子的进化,以减轻其影响。这导致了一场复杂的持续进化军备竞赛,以维持雌雄平衡。然而,在某些性别决定为 XX/X0 的昆虫和线虫中,通过非典型减数分裂优先产生含 X 的精子,从而产生了性别比例高度倾斜的野生型种群。事实上,模型表明,在某些条件下,X-减数分裂的驱动力可以增强种群的规模和持续性,这对传统的有害影响观点提出了挑战。进一步了解 X 染色体非孟德尔传递的各种机制和进化后果,将有助于我们深入了解遗传、性别决定和种群动态,并对基础研究和实际应用产生影响。
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Non-Mendelian transmission of X chromosomes: mechanisms and impact on sex ratios and population dynamics in different breeding systems.

The non-Mendelian transmission of sex chromosomes during gametogenesis carries significant implications, influencing sex ratios and shaping evolutionary dynamics. Here we focus on known mechanisms that drive non-Mendelian inheritance of X chromosomes during spermatogenesis and their impact on population dynamics in species with different breeding systems. In Drosophila and mice, X-linked drivers targeting Y-bearing sperm for elimination or limiting their fitness, tend to confer unfavourable effects, prompting the evolution of suppressors to mitigate their impact. This leads to a complex ongoing evolutionary arms race to maintain an equal balance of males and females. However, in certain insects and nematodes with XX/X0 sex determination, the preferential production of X-bearing sperm through atypical meiosis yields wild-type populations with highly skewed sex ratios, suggesting non-Mendelian transmission of the X may offer selective advantages in these species. Indeed, models suggest X-meiotic drivers could bolster population size and persistence under certain conditions, challenging the conventional view of their detrimental effects. Furthering our understanding of the diverse mechanisms and evolutionary consequences of non-Mendelian transmission of X chromosomes will provide insights into genetic inheritance, sex determination, and population dynamics, with implications for fundamental research and practical applications.

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来源期刊
Biochemical Society transactions
Biochemical Society transactions 生物-生化与分子生物学
CiteScore
7.80
自引率
0.00%
发文量
351
审稿时长
3-6 weeks
期刊介绍: Biochemical Society Transactions is the reviews journal of the Biochemical Society. Publishing concise reviews written by experts in the field, providing a timely snapshot of the latest developments across all areas of the molecular and cellular biosciences. Elevating our authors’ ideas and expertise, each review includes a perspectives section where authors offer comment on the latest advances, a glimpse of future challenges and highlighting the importance of associated research areas in far broader contexts.
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