Utilization of weedy rice for development of japonica hybrid rice (Oryza sativa L.).
Utilization of weedy rice for development of japonica hybrid rice (Oryza sativa L.).
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DOI：
10.1016/j.plantsci.2011.02.002
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Liang Tang;Dianrong Ma;Zhengjin Xu;Huangfeng Deng;W. Chen;Longping Yuan
中科院分区：
文献类型：
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作者：
Liang Tang;Dianrong Ma;Zhengjin Xu;Huangfeng Deng;W. Chen;Longping Yuan
以2个代表性杂草稻品系、3个代表性粳稻品种和3个代表性籼稻品种为材料，进行6对正反交。对12个杂种F1代及其亲本和4个优良品种的形态性状进行了中亲优势、超亲优势和竞争优势分析。杂草稻株系的性状比栽培稻的大，杂草稻与粳稻杂交可产生较好的杂种优势。杂草稻与粳稻的亲缘关系较籼稻近。但杂草稻与粳稻正反交的杂种优势与籼稻与粳稻的杂种优势相近。在118份杂草稻品系中，有6份含有BT型细胞质雄性不育的育性恢复基因。杂草稻具有丰富的多态性，是一种非常宝贵的种质资源。同时，应通过与粳稻杂交、回交、复交等途径，改良其倒伏、落粒、株型松散的缺点。虽然杂草稻难以直接利用，但通过改良，发展杂交粳稻，可以利用杂草稻培育不育系和恢复系。
Two representative weedy rice lines, three typical japonica varieties and three typical indica varieties were used for 6 pairs of reciprocal crosses. The morphological traits of twelve F1hybrid lines, their parents and four elite cultivars were investigated for heterosis over mid-parent (HM), over parent (HP) and competitive heterosis (CH) analysis. Traits detected in weedy rice lines seemed larger than those in cultivars and excellent heterosis was produced in weedy rice crossing with japonica rice. Although weedy rice kept closer relationships with japonica rice compared to indica rice. But the heterosis of reciprocal crosses between weedy rice and japonica was closed to those of crosses between indica rice and japonica rice. In six of one hundred and eighteen weedy rice lines, the fertility restore gene for BT type cytoplasmic male sterility (BT-CMS) were detected. Weedy rice was very valuable germplasm resources with the abundant polymorphism. Meanwhile, the disadvantage, lodging, shattering and incompact plant type, should be modified by hybridization, backcross and multiple cross with japonica rice. Although it is difficult to use weedy rice directly, weedy rice may be available to breed both male sterile line and restorer line through improvement, developing japonica hybrid rice.