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水稻叶片的形态改良是水稻株型育种和产量育种的重要目标之一。以9311/日本晴染色体片段置换系(CSSLs)群体为材料,定位了上3叶叶片长、宽、叶面积共9个性状QTL,分析了叶片性状与产量性状之间的相关性,同时定位了主穗重及产量构成因素(颖花数、千粒重、结实率)相关QTL。结果表明,CSSLs群体的叶片性状之间存在显著或极显著相关性;叶片性状与主穗重呈显著或极显著正相关,与主穗颖花数呈极显著正相关;叶片形态多数性状与结实率、千粒重没有显著相关性。两年共定位到20个叶片性状QTL,分布于第1、3、4、5、6、9、11共7条染色体的10个区间,贡献率为3.82%～14.61%,其中贡献率大于10%有6个,多个QTL成簇分布在相同区间,3个QTL在两年间重复检测到,8个QTL为前人未报道的新位点。两年共检测到16个与控制主穗产量相关的QTL,分布于第1、2、3、5、7、8、10共7条染色体13个区间,其中有7个主穗产量相关QTL所在5个区间与叶片形态14个QTL所在区间一致。
Morphological improvement of rice leaves is one of the important objectives of plant type breeding and yield breeding in rice. Nine QTLs for leaf length, width and leaf area of top three leaves were mapped using 9311 / Nipponbare Chromosome Segment Replacement (CSSLs) population. The correlation between leaf traits and yield traits was analyzed. Ear weight and yield components (spikelets, 1000 - grain weight, seed setting rate) were correlated with QTLs. The results showed that there was a significant or very significant correlation between leaf traits of CSSLs population. The leaf traits had a significant or highly significant positive correlation with the main ear weight, but significant positive correlation with the main spikelet number. Most traits of leaf shape and fruiting Rate, 1000-grain weight was not significantly correlated. Two QTLs mapped to 20 leaf traits were distributed in 10 intervals of chromosome 1, 3, 4, 5, 6, 9 and 11 with a contribution rate of 3.82% -14.61%, of which, the contribution rate was more than 10 There were 6% of the QTLs in the cluster, with many QTLs clustered in the same region. Three QTLs were repeatedly detected in two years and eight QTLs were not reported in the previous cases. A total of 16 QTLs related to the control of main ear production were detected in two years, distributed in 13 intervals of 7 chromosomes on chromosomes 1, 2, 3, 5, 7, 8 and 10, of which 7 were major QTLs Five intervals were consistent with 14 QTLs in leaf morphology.