YANG Meng-yuan,GAO Jie,ZHANG Xiang,et al.Genetic Analysis of Flat Pod Rate in Soybean and Germplasm Screening for Identification Elite Cultivars with Low Flat Pod Rate[J].Soybean Science,2019,38(01):7-15.[doi:10.11861/j.issn.1000-9841.2019.01.0007]
大豆秕荚率的遗传分析及低秕荚率种质的筛选
- Title:
- Genetic Analysis of Flat Pod Rate in Soybean and Germplasm Screening for Identification Elite Cultivars with Low Flat Pod Rate
- Keywords:
- Soybean; Broad sense heritability; Flat pod rate; Germplasm screening
- 文献标志码:
- A
- 摘要:
-
为研究大豆秕荚率的遗传特性,筛选出秕荚率较低的大豆种质,本文以17份主要来源于黄淮和东北的种质为研究对象,在2015和2017年进行完全随机区组播种,统计不同基因型大豆的秕荚率、重要农艺性状以及秕荚率的遗传分析并筛选秕荚率低的种质。结果表明:基因型、环境、基因型和环境互作均对大豆秕荚率有极显著(P<0.001)影响。秕荚率平均为17.21%,变化范围为6.26%~46.40%。秕荚率较低的有黑农37(6.26%)和科丰53(6.27%),秕荚率较高的有毛豆(46.40%)和豫豆25(33.19%)。2017年春播材料的秕荚率显著高于2015年夏播秕荚率,极显著高于2015年春播和2017年夏播的秕荚率。秕荚率的广义遗传力为54.55%,位于中等水平。相关分析表明,秕荚率与单株秕荚数极显著正相关(r=0.66,P<0.001),与株高(r=0.15,P=0.04)正相关,与分枝数、主茎节数和单株荚数的相关性不显著。间接选择效率指数均<1,表明对于大豆秕荚率的改良应以直接选择为主。本研究不仅揭示了大豆秕荚率的遗传特性,同时也筛选出了可用于大豆秕荚率遗传改良的优良种质,为进一步大豆育种奠定了理论基础。
- Abstract:
- In order to dissect the genetic characteristics of flat pod rate(FPR) in soybean and identify elite cultivars for further breeding, 17 germplasms which mainly originated from Huanghuaihai district and northeast of China were planted in a randomized block design with three replication in spring and summer of 2015 and 2017 respectively. In this research, FPR and some other important agricultural traits were tested. Furtherly, genetic analysis of FPR and elite germplasms with low FPR were also determined. The results of ANOVA showed that genotype, environment, genotype×environment all had great effects on FPR (P<0.001). The FPR varied from 6.26% to 46.40% with an average of 17.21% across the all environments. The elite germplasms with low FPR (<7%) were Heinong 37 and Kefeng 53; while those with high FPR (>30%) were Maodou(46.40%)and Yudou 25(33.19%). The FRP in 2017 spring was significantly higher than that in 2015 summer at P=0.05 and than those in 2015 spring and 2017 summer at P=0.01 level. The broad sense heritability of FPR was 54.55% based on the results of the average of lines. The results of correlation analysis showed that FPR was significantly positively related to flat pod number (r=0.66, P<0.001) and height (r=0.15, P=0.04), not related to branch number (r=0.10, P=0.18), stem number (r=0.08, P=0.27), and pod number (r=0.10, P=0.17). All of the relative efficiencies of indirect selection were<1, which meant that the direct selection for FPR was superior to the indirect selection by other traits in the breeding progress. This research not only revealed the genetic figure of FPR and screened out the elite germplasms for cultivar development but also set a foundation for further QTL mapping and gene cloning.
参考文献/References:
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备注/Memo
收稿日期:2017-09-30基金项目:国家十三五重点研发计划(2016YFD0100201-09);农业部国家作物种质资源保护专项(2015NWB030-05)。第一作者简介:杨梦园(1992-),女,硕士,主要从事生化与分子生物学研究。E-mail:18736707783@qq.com。通讯作者:刘立科(1974-),男,博士,副教授,主要从事作物遗传育种学研究。E-mail:liulike@lcu.edu.cn。