Relationship between hybrid performance and genetic diversity based on RAPD markers in wheat, Triticum aestivum L.

文献类型： 外文期刊

第一作者： Pei, Y

作者： Pei, Y;Pu, ZJ

作者机构：

关键词： Triticum aestivum;genetic diversity;hybrid performance;RAPD marker

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 1999 年 118 卷 2 期

页码：

收录情况： SCI

摘要： Random amplified polymorphic DNA (RAPD) markers were generated from 20 wheat, Triticum aestivum, lines. Fifty-four fragments generated by six primers of a 10-mer arbitrary sequence were used to study their potential power in differentiating parents with different characteristics and predicting the yield performance of hybrids produced from these parents, Experimental results showed that the 20 wheat lines were divided into four groups. Group I was characterized by more grains per spike, group II by heavy grains and group III by more spikes per unit area and short plants; group IV was similar to group III but had a much higher biomass yield and grain yield. Hybrids from parents in different groups were generally superior to most hybrids from parents in the same group. Both yield performance and heterosis of hybrids from parents between group I and group III were much better than those of other intergroup hybrids. These results suggest that, based on RAPD markers, it is possible to differentiate wheat lines with different performances and that the classification of parents from these markers is of predictive value for developing superior hybrids. However, genetic distance (GD) based on RAPD markers was not significantly correlated with hybrid performance and heterosis. It appears to be impossible to predict hybrid performance from GD itself.

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