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Studying on the strictly self-compatibility mechanism of ‘Liuyefeitao’ peach (Prunus persica L.)

Wei Liu,Mao-Song Pei,A. Zhang

Published 2018 in PLoS ONE

ABSTRACT

Peach (Prunus persica L.) generally exhibits self-pollination, however, they can also be pollinated by other varieties of pollen. Here we found two varieties that are different from other peaches: ‘Daifei’ and ‘Liuyefeitao’. ‘Daifei’ produces less pollen, which needs artificial pollination, honeybee pollination, and the fruit setting depends on other varieties of peach pollen. ‘Liuyefeitao’ exhibits strictly self-pollination, hence pollen from other species is rejected. To explore the mechanism of this phenomenon, we performed a high-throughput sequencing of the stigma (including style) of ‘Daifei’ and ‘Liuyefeitao’ to explain the rejection mechanism of other varieties of pollen of ‘Liuyefeitao’ peach. In our study, we found one S gene, and lots of non-S-locus factors such as: F-box proteins, Ub/26S, MAPKs, RLK, and transcription factor were differential expressed between ‘Daifei’ and ‘Liuyefeitao’. We supposed that the strictly self-compatible of ‘Liuyefeitao’ may result from the synthesis of these factors.

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