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Molecular marker assisted selection for drought tolerant wheat genotypes

机译:分子标记辅助选择耐旱小麦基因型

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A diverse population was generated through induced mutation with an objective to develop drought tolerant wheat genotypes. Population was first accesses for genetic diversity through random amplified polymorphic DNA and then investigated for drought tolerant through sequence tagged sites technique. A total of 100 alleles were amplified with 15 random primers out of which 78 % were polymorphic and 22 % were monomorphic. Fragments size ranged from 198bp-1.842kbp and fragments produced by various primers ranged from 2-13 with an average of 7.4 fragments per primer. Genetically most similar genotypes were SMP1 and KMP4 (95.2%) followed by TMP3 and TMP4 (94.9%) while most dissimilar genotypes were SMP5 and KMP2 (55.8%). On the basis of results achieved, the varieties could be divided into four clusters. Of eighteen, eleven genotypes amplify the DREB F1R1 fragment. Fourteen genotypes tagging the specific sites in the wheat genome with F2R2 and thirteen genotypes were amplified with F3R3 (DREB sequence). Wheat DNA amplification with DREB gene yields 190-220bp bands with F2R2 and F3R3 whereas F1R1 yields 1.9-3.0 kb.
机译:通过诱导突变产生了多样化的种群,目的是发展耐旱的小麦基因型。首先通过随机扩增的多态性DNA获得种群的遗传多样性,然后通过序列标记位点技术研究种群的耐旱性。用15个随机引物扩增了100个等位基因,其中78%是多态性,22%是单态性。片段大小范围为198bp-1.842kbp,各种引物产生的片段范围为2-13,每个引物平均7.4个片段。遗传上最相似的基因型是SMP1和KMP4(95.2%),其次是TMP3和TMP4(94.9%),而最不相似的基因型是SMP5和KMP2(55.8%)。根据取得的成果,该品种可分为四个类别。 18个基因型中,有11个基因型扩增了DREB F1R1片段。用F2R2标记小麦基因组中特定位点的14个基因型,用F3R3(DREB序列)扩增了13个基因型。用DREB基因扩增小麦DNA时,F2R2和F3R3产生190-220bp的条带,而F1R1产生1.9-3.0 kb的条带。

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