人工海水胁迫下小麦种质资源的耐盐性筛选与鉴定
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Screening and Identification of Wheat Germplasm for Salt Tolerance using Artificial Sea Water
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    摘要:

    利用人工配制的海水筛选耐盐性较好的小麦品种,为沿海滩涂地区的小麦耐盐育种提供重要信息。本文利用人工海水处理的方法,对363份小麦种质资源进行了芽期耐盐性初步鉴定,筛选出芽期耐盐性为一级的小麦种质28份。进一步对芽期耐盐性较好的48份小麦种质进行了苗期耐盐性鉴定,并对其耐盐指标进行隶属值模糊评价分析,从中鉴定出了2个苗期耐盐性较强的小麦种质,分别为淮麦31和红壳洋麦。依据来源的不同,发现小麦种质资源的芽期耐盐性大小依次为地方品种>育成品种>国外引进品种。小麦芽期与苗期的耐盐性相关分析表明,二者相关性极低(r=0.0051)。

    Abstract:

    Salinity is a major limitation to crop production in coastal region. Breeding for salinity tolerance could be an effective way of improving yield and yield stability on saline-alkaline soils. However, these require a good understanding of the inheritance of this trait and occupy massive amounts of elite genetics resources tolerant to salt-stress. To provide elite germplasm for new varieties tolerant to salinity in wheat breeding, 363 accessions were evaluated for salt tolerance at the germination stage using artificial sea water. Among accessions tested,28 wheat cultivars with salt tolerance grade 1 were identified. To obtain further salt-tolerant accession at the seedling stage, 48 wheat accessions were selected from the salt tolerance resources ( grade 1 or grade 2 ) at the germination stage to evaluate salt-tolerant at the seedling stage. Two wheat accessions with high salt-tolerant were screened by using the methods of fuzzy membership function. They were Huaimai 31 and Hongkeyangmai, respectively. Based on the original of the wheat germplasm, the capacity of salinity tolerance was different: local varieties>improved varieties>introduced varieties. Correlation analysis of wheat salt tolerance at the germination stage and the seedling stage showed that there is no consistent correlation existed.

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吴纪中,刘妍妍,王冲,等.人工海水胁迫下小麦种质资源的耐盐性筛选与鉴定[J].植物遗传资源学报,2014,15(5):948-953.

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  • 收稿日期:2013-12-10
  • 最后修改日期:2013-12-29
  • 录用日期:2014-08-07
  • 在线发布日期: 2014-09-05
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