Abnormal transition from meiosis I to meiosis II induces male sterility in a seedless artificial hybrid of citrus.

ABSTRACT: Male sterility is an important trait for breeding and for the seedless fruit production in citrus. We identified one seedling which exhibiting male sterility and seedlessness (named ms1 hereafter), from a cross between two fertile parents, with sour orange (Citrus aurantium) as seed parent and Ponkan mandarin (Citrus reticulata) as pollen parent. Analysis using pollen viability staining, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) revealed that the mature pollen of the ms1 was aborted, displaying collapse and deformity. Further cytological analysis identified the abnormal formation of monad, dyad, and tetrad instead of the normal tetrad formation, leading to meiotic failure in the seedless hybrid. By comparative transcript prof

SUBMITTER: Rao Z 

PROVIDER: S-EPMC11649890 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature