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首页> 外文期刊>Breeding science >Development and evaluation of Oryza glaberrima Steud. chromosome segment substitution lines (CSSLs) in the background of O. sativa L. cv. Koshihikari
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Development and evaluation of Oryza glaberrima Steud. chromosome segment substitution lines (CSSLs) in the background of O. sativa L. cv. Koshihikari

机译：开发和评价稻。稻的背景中的染色体片段替换线（CSSLs）。越光

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摘要

Oryza sativa and O. glaberrima are the cultivated forms of rice in Asia and Africa, respectively. While both possess important agricultural traits, genes that are unique to either species can be used to improve the other. To explore the genetic potential of the African rice as a genetic resource for the improvement of O. sativa , 34 chromosome segment substitution lines of O. glaberrima in the background of the elite japonica cultivar Koshihikari were developed and used to identify QTLs associated with 10 traits related to grain yield, plant stature and maturity. More than 90% of the entire genome of the donor parent was represented in contiguous or overlapping chromosome segments in the CSSL set. A total of 105 putative QTLs were identified, 84 of which had positive and 21 had negative effects on the traits examined. Of the 84 QTLs with positive effects, 64 were associated with increase in grain length, grain width, grain thickness, 100-grain weight, grain number per panicle and number of primary branches per panicle whereas 20 QTLs control plant stature. These results suggest that alleles from the African rice may be useful in improving traits related to grain yield and plant stature in existing cultivars of O. sativa .
机译：水稻和稻米分别是亚洲和非洲的水稻栽培形式。尽管两者都具有重要的农业特性，但任一物种特有的基因都可用于改善另一个。为了探索非洲水稻作为改良稻米遗传资源的遗传潜力，在日本粳稻优良品种光芝光背景下开发了34个甘蓝型染色体片段替代品系，并将其用于鉴定与10个性状相关的QTL。与谷物产量，植物身高和成熟度有关。供体亲本的整个基因组的90％以上都以CSSL组中连续或重叠的染色体片段表示。总共鉴定出105个假定的QTL，其中84个对检测的性状有积极影响，21个对性状有负面影响。在84个具有积极作用的QTL中，有64个与籽粒长度，籽粒宽度，籽粒厚度，100粒重，每穗粒数和每穗初级分支数的增加有关，而20个QTL控制植物的株高。这些结果表明，来自非洲水稻的等位基因可能有助于改善与水稻现有栽培品种的籽粒产量和植物身材有关的性状。

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