Genetic diversity in Hordeum agriocrithon E.Aberg, six-rowed barley with brittle rachis, from Tibet
Genetic diversity in Hordeum agriocrithon E.Aberg, six-rowed barley with brittle rachis, from Tibet
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DOI：
10.1023/a:1011254927505
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发表时间：
2001-02-01
影响因子：
2
通讯作者：
Konishi, T
中科院分区：
文献类型：
--
作者：
Konishi, T
22份H.对来自西藏的100头野生稻进行了形态和生理性状分析，并对酯酶同工酶Est 1、Est 2和Est 4紧密连锁复合位点的等位基因进行了基因型组合。H. agriocrithon与西藏栽培大麦的株型相似，而与H.自发的H.农业生物按其穗芒类型分为变种。eu-agriocriton，dawoense和paradoxon，与一个例外加入awnless裸型类似var.栽培大麦的裸茎。它们具有春季生长习性，对白粉病日本生理小种I感病，酯酶基因型与西藏、不丹和拉达克栽培大麦相同。这种相似性表明，3 H染色体上的酯酶复合体位点与一些适应西藏环境的QTL紧密连锁。关于H. agriocrithon的自然杂交，可能是H.在阿富汗、巴基斯坦或印度的北方地区发现了割手密和六棱大麦，将它们的分离子混入大麦或小麦中带入西藏，得到了轴脆的六棱大麦。
Twenty-two accessions of H. agriocrithon from Tibet were investigated for morphological and physiological characters, and genotypes combined alleles at the tightly linked Est1, Est2 and Est4 complex locus encoding esterase isozymes. H. agriocrithon was similar in plant type to Tibetan cultivated barley, but different from H. spontaneum. The accessions of H. agriocrithon were classified by their spike-awn types into vars. eu-agriocrithon, dawoense and paradoxon, with one exceptional accession of the awnless naked type similar to var. nuditonsum of cultivated barley. They were characterized by spring growth habit, susceptibility to Japanese race I of powdery mildew, and either of the same three esterase genotypes as those of cultivated barley from Tibet, Bhutan and Ladakh. The similarity suggested that the esterase complex locus on chromosome 3H is closely linked with some QTL for adaptation to Tibetan conditions. On the origin of H. agriocrithon, it might be concluded that natural hybridization between H. spontaneum and six-rowed barley occurred in northern parts of Afghanistan, Pakistan or India, and seeds of their segregants mixed into barley or wheat were brought up to Tibet, resulting six-rowed barley with brittle rachis.