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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Rice variety Dhanrasi, an example of improving yield potential and disease resistance by introgressing gene(s) from wild species (Oryza rufipogon)
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Rice variety Dhanrasi, an example of improving yield potential and disease resistance by introgressing gene(s) from wild species (Oryza rufipogon)

机译：水稻品种Dhanrasi，通过渗入野生物种的基因来提高产量潜力和抗病性的一个例子（Oryza rufipogon）

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摘要

Rice variety Dhanrasi (C ll-A-41) was developed by introgressing gene(s) for yield enhancement, resistance to blast and moderate resistance to bacterial blight and rice tungro disease from wild species (Oryza rufipogon). The O. rufipogon accession resistant to blast, bacterial blight and rice tungro disease was crossed with high-yielding line B 32-Sel-4. The FI (B 32-Sel-4x0. rufipogon) was crossed with another high-yielding line B 127. Two cycles of selective intermating were followed in the F_2 generation and thereafter pedigree method of selection was continued. In the F_5 generation 32 lines were evaluated with the indica parents for yield, and also screened for blast and bacterial blight resistance. Eight lines were superior in yield to both the indica parents by 10.2-21.4%, indicating introgression of yield-enhancing gene(s) from O. rufipogon. Culture C ll-A-41 yielded the highest (6.48 t/ha) with yield superiority of 38.2 and 21.4% over its parents B 32-Sel-4 and B 127 respectively. The present results indicated that the gene(s) for yield enhancement, resistance to blast and moderate resistance to bacterial blight and rice tungro disease in C ll-A-41 were introgressed from O. rufipogon. Considering its yield superiority and multiple resistance to diseases, the culture (C ll-A-41) was released as variety Dhanrasi for cultivation in Andhra Pradesh, Tamil Nadu, Karnataka and Maharashtra in 2002.
机译：水稻品种Dhanrasi（C ll-A-41）通过渗入基因来开发，以提高产量，抗稻瘟病以及对野生物种（Oryza rufipogon）的细菌白叶枯病和水稻通花病具有中等抗性。对稻瘟病，细菌性枯萎病和水稻通哥病具有抵抗力的红景天种质与高产品系B 32-Sel-4杂交。 FI（B 32-Sel-4x0。rufipogon）与另一条高产系B 127杂交。在F_2代中进行了两次选择杂交，然后继续进行系谱选择。在F_5代中，用the稻亲本评估了32个品系的产量，并筛选了抗稻瘟病和细菌性白叶枯病。八株品系比两个both稻亲本的产量都高10.2-21.4％，这表明红景天麦的增产基因渗入。培养物Cll-A-41的产量最高（6.48吨/公顷），产量分别比其亲本B 32-Sel-4和B 127高38.2％和21.4％。目前的结果表明，C ll-A-41中的产量增强，抗稻瘟病和中等抗细菌白叶枯病和水稻通哥病的基因被引入。考虑到其产量优势和对疾病的多重抗性，该培养物（C ll-A-41）作为Dhanrasi品种发布，于2002年在安得拉邦，泰米尔纳德邦，卡纳塔克邦和马哈拉施特拉邦种植。

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