2007-04-112024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/661670摘要：秈&#31241;兩大水稻亞種，各具有不同優良生育特性。台灣跨亞熱帶與熱帶，擁有經過長期馴化的&#31241;稻品種，及原生於此一地區的優良秈稻品種。採用國內秈稻與&#31241;稻良質米推薦品種作為雜交親本，可以融合秈&#31241;兩亞種種原之優良基因，擴大試驗族群內的遺傳變異。因為這些本地優良品種所帶有的優良基因，都已經過長期的考驗，其表現的穩定性，將優於國外種原。但目前水稻育種家進行秈&#31241;稻雜交分離後裔選拔時，發現朝向短圓（&#31241;）型選拔穀粒外形，往往造成心腹白程度大幅提高的結果。在本計畫中，我們將挑選適當的親本進行秈&#31241;稻雜交，建立分離世代族群，與大量的分子標記，以便對於控制外觀品質（穀粒外形、心腹白）的數量性狀基因座進行定位分析，探討外觀品質性狀的遺傳，並發展可以輔助選種的分子標記，以提高育種效率。<br> Abstract: Taiwan is located in a region across tropical and sub-tropical area and is suitable for rice (Oryza sativa L.) production. Elite varieties currently cultivated in Taiwan are either derived from domesticated Japonica type lines introduced to this area about a century ago or from Indica type lines that were originated in this region. Both sub-species contain favorable traits in a somewhat different way. It is desirable to combine superior genes, using locally adapted elite cultivars of different sub-species as parents, in rice breeding program. However, when the segregating populations derived from crosses between sub-species were selected for a more favorable short-round shape of kernel, the degree of chalkiness in endosperm is noticeably increased. Objectives of this proposed research are to establish segregating F2 populations resulting from inter-sub-species crosses and a set of Insertion/Deletion markers that uniformly cover the whole genome with less than 15cM apart, in order to facilitate the construction of a linkage map for mapping quantitative trait loci (QTLs) controlling kernel shape and chalkiness of endosperm that may be conducted in the following years.數量性狀基因座基因定位穀粒外型心腹白Quantitative trait lociGene mappingKernel shapeKernel chalkiness