Slowing development restores the fertility of thermo-sensitive male-sterile plant lines
Slowing development restores the fertility of thermo-sensitive male-sterile plant lines
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减缓发育可恢复热敏雄性不育植物系的生育力
DOI：
10.1038/s41477-020-0622-6
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发表时间：
2020-03
期刊：
影响因子：
18
通讯作者：
Yang Zhong-Nan
中科院分区：
文献类型：
--
作者：
Zhu Jun;Lou Yue;Shi Qiang-Sheng;Zhang Sen;Zhou Wen-Tao;Yang Jun;Zhang Cheng;Yao Xiao-Zhen;Xu Te;Liu Jia-Li;Zhou Lei;Hou Jian-Qiao;Wang Jia-Qi;Wang Shui;Huang Xue-Hui;Yang Zhong-Nan
温敏核雄性不育系在杂交种育种中得到广泛应用，但温度作为一种普遍的环境因子，是如何逆转不同温敏核雄性不育系的育性的尚不清楚。在此，我们鉴定了在低温（17 °C）下可育并且编码GDSL脂肪酶的被命名为可逆雄性不育（rvms）的不育TGMS系。细胞学观察和统计分析表明，低温使花粉发育减慢。对rvms恢复系的进一步筛选以及与常温（24 °C）下生长缓慢的品系的杂交表明，发育缓慢克服了rvms小孢子的缺陷，并使它们能够发育成功能性花粉。几个otherapeopsisTGMS系被确定，他们的生育能力也恢复了发展放缓。鉴于男性生殖发育是保守的，我们建议，发展放缓是一个普遍的机制适用于不育-育性转换的温敏核不育系从不同的植物物种。
Temperature-sensitive genic male sterility (TGMS) lines are widely used in the breeding of hybrid crops,, but by what means temperature as a general environmental factor reverses the fertility of different TGMS lines remains unknown. Here, we identified anArabidopsisTGMS line namedreversible male sterile(rvms) that is fertile at low temperature (17 °C) and encodes a GDSL lipase. Cytological observations and statistical analysis showed that low temperature slows pollen development. Further screening of restorers ofrvms, as well as crossing with a slow-growth line at normal temperature (24 °C), demonstrate that slowing of development overcomes the defects ofrvmsmicrospores and allows them to develop into functional pollen. Several otherArabidopsisTGMS lines were identified, and their fertility was also restored by slowing of development. Given that male reproductive development is conserved, we propose that slowing of development is a general mechanism applicable to the sterility–fertility conversion of TGMS lines from different plant species.
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