Single locus sex determination and female heterogamety in the basket willow (Salix viminalis L.).
Single locus sex determination and female heterogamety in the basket willow (Salix viminalis L.).
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DOI：
10.1038/hdy.2014.125
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发表时间：
2015-06
期刊：
影响因子：
3.8
通讯作者：
Berlin, S.
中科院分区：
文献类型：
--
作者：
Pucholt, P.;Ronnberg-Wastljung, A-C;Berlin, S.
大多数真核生物有性繁殖，在这个谱系中进化出了大量不同的性别决定机制。雌雄异株或两性分离在开花植物中是罕见的，但从雌雄同体的祖先反复进化而来，可能涉及雄性或雌性不育突变。柳树（Salix spp.）和杨树（Populus spp.）主要是雌雄异株，是水杨科的成员。所有研究的杨树在第XIX染色体上都有性别决定位点，但其位置因种而异，存在雄性和雌性异种配子系统。与杨树的情况相反，杨树性别决定机制的知识很少。在本研究中，我们首次利用数量性状位点作图的方法，将性别决定位点定位在蛇麻草的XV染色体上。所有的雌性后代都携带了母系遗传的单倍型，这表明存在一种雌性异种配子或ZW系统。采用比较作图的方法，比较了紫棘球蚴（S. viiminalis）连锁图谱与紫棘球蚴（S. purpurea）、苏氏棘球蚴（S. suchowensis）和毛癣棘球蚴（P. trichocarpa）物理图谱的标记位置。由于我们没有发现S. viminalis和P. trichocarpa之间的染色体XV和XIX染色体重排的证据，这表明柳树和杨树的性别决定位点很可能没有共同的起源，因此它们是分开进化的。这表明水杨科植物的性别决定机制具有很高的周转率，因此它对于研究涉及性染色体周转率的进化过程是极好的。
Most eukaryotes reproduce sexually and a wealth of different sex determination mechanisms have evolved in this lineage. Dioecy or separate sexes are rare among flowering plants but have repeatedly evolved from hermaphroditic ancestors possibly involving male or female sterility mutations. Willows (Salix spp.) and poplars (Populus spp.) are predominantly dioecious and are members of the Salicaceae family. All studied poplars have sex determination loci on chromosome XIX, however, the position differs among species and both male and female heterogametic system exists. In contrast to the situation in poplars, knowledge of sex determination mechanisms in willows is sparse. In the present study, we have for the first time positioned the sex determination locus on chromosome XV in S. viminalis using quantitative trait locus mapping. All female offspring carried a maternally inherited haplotype, suggesting a system of female heterogamety or ZW. We used a comparative mapping approach and compared the positions of the markers between the S. viminalis linkage map and the physical maps of S. purpurea, S. suchowensis and P. trichocarpa. As we found no evidence for chromosomal rearrangements between chromosome XV and XIX between S. viminalis and P. trichocarpa, it shows that the sex determination loci in the willow and the poplar most likely do not share a common origin and has thus evolved separately. This demonstrates that sex determination mechanisms in the Salicaceae family have a high turnover rate and as such it is excellent for studies of evolutionary processes involved in sex chromosome turnover.
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影响因子：
4.4
作者：
Berlin S;Lagercrantz U;von Arnold S;Ost T;Rönnberg-Wästljung AC
通讯作者：
Rönnberg-Wästljung AC
DOI：
10.1073/pnas.0405126101
发表时间：
2004-11-09
影响因子：
11.1
作者：
Berlin, S;Ellegren, H
通讯作者：
Ellegren, H
影响因子：
6.9
作者：
Höglund, S;Larsson, S;Wingsle, G
通讯作者：
Wingsle, G
DOI：
10.1098/rstb.2000.0717
发表时间：
2000-11-29
影响因子：
6.3
作者：
Charlesworth, B;Charlesworth, D
通讯作者：
Charlesworth, D
影响因子：
5.4
作者：
AlstromRapaport, C;Lascoux, M;Gullberg, U
通讯作者：
Gullberg, U