小麦-中间偃麦草衍生材料农艺性状HMW-GS及GISH鉴定
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国家科技支撑计划(2011BAD07B02);河南省重大科技专项(121100111400);河南省科技攻关(132102110031)


Agronomic Traits and HMW-GS of 143 Wheat-Thinopyrum Progenies and Their GISH Identification
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    摘要:

    本研究以143个小麦-中间偃麦草种质为材料,利用表型、高分子量麦谷蛋白亚基(HMW-GS)及基因组原位杂交(GISH)分析其遗传组成,为小麦育种中广泛有效地利用这些种质提供有用信息。小麦-中间偃麦草种质主要农艺性状变异丰富,其在穗长、小穗数和分蘖数性状上明显优于主栽品种,分别有142(99.3%)、125(87.4%)和62(43.4%)个小麦-中间偃麦草材料的穗长、分蘖数和小穗数大于主栽品种的平均值。供试材料在Glu-13个基因位点上共检测到12个等位变异,形成15种亚基组合类型,以(2*,7 8,5 10)为主,占所有材料的25.7%;Glu-A1(1和2*)、Glu-B1(7 8)和Glu-D1(5 10)位点的优质亚基比例分别达到了68.4%、68.4%和52.0%,有102(71.3%)个材料在Glu-1的2或3个位点同时具有优质亚基;优质亚基组合为(2*,7 8,5 10)或(1,7 8,5 10),且在穗长、小穗数和分蘖数性状上均优于主栽品种的材料有17个。进一步对30个代表性材料GISH分析发现这些材料主要为八倍体和六倍体小偃麦。研究结果表明这些材料可以作为改良普通小麦的有用基因资源。

    Abstract:

    One hundred and forty-three wheat-Thinopyrum progenies were evaluated based on agronomic traits, high-molecular-weight glutenin subunit (HMW-GS) and genomic in situ hybridization (GISH). Analysis of main agronomic traits indicated that there was an abundant genetic variation in these germplasms, and most of them were superior in spike length, spikelets and spikes per plant than main wheat cultivars. One hundred and forty-two (99.3%), 125 (87.4%) and 62(43.4%)of the wheat-Thinopyrum progenies were above the average of main wheat cultivars for the three traits, respectively. At Glu-1 locus, a total of 12 different glutenin alleles were observed. They resulted in 15 different HMW subunit combinations, and the combination (2*,7 8,5 10) was the major type with the frequency of 25.7%. Desirable HMW subunits, 1 and 2* in Glu-A1, 7 8 in Glu-B1 and 5 10 in Glu-D1, were found in this study with the frequency of 68.4%, 68.4% and 52.0%, respectively. One hundred and two wheat-Thinopyrum progenies had desirable HMW subunits at two or three locus of Glu-1, which occupied 71.3% of all accessions. The combinations of HMW-GS were(2*, 7 8, 5 10)or(1, 7 8, 5 10)in seventeen of the wheat-Thinopyrum progenies, and all of them were superior in spike length, spikelets and spikes per plant than main wheat cultivars. Furthermore, thirty representative wheat-Thinopyrum progenies were tested with GISH, and the result showed that most of the accessions were octoploid or hexaploid trititrigias. These results obtained indicated that these wheat-Thinopyrum progenies were important genome resources in wheat improvement.

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李小军,李淦,胡铁柱,等.小麦-中间偃麦草衍生材料农艺性状HMW-GS及GISH鉴定[J].植物遗传资源学报,2016,17(1):126-131.

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  • 收稿日期:2015-01-16
  • 最后修改日期:2015-08-05
  • 录用日期:2015-08-12
  • 在线发布日期: 2016-01-19
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