Fertile, intermediate hybrids between Phaseolus vulgaris and P. acutifolius from congruity backcrossing.
Fertile, intermediate hybrids between Phaseolus vulgaris and P. acutifolius from congruity backcrossing.
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DOI：
10.1007/bf00227023
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发表时间：
1988-01-01
影响因子：
--
通讯作者：
Ascher, P. D.
中科院分区：
文献类型：
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作者：
Haghighi, K. R.;Ascher, P. D.
通过花粉染色和每荚结实率来衡量，与任何一个亲本的轮回(导入)回交提高了育性，但总是导致非轮回亲本的性状丧失。当杂交后代与亲本交替回交(一致回交；CBC)时，育性在早期世代下降，但后来逐渐增加，到第4代或第5代时达到亲本的种子/荚水平，但可染花粉的百分率没有达到亲本水平。CBC杂交种的形态取决于亲本物种的剂量；当每个亲本的剂量相同时，形态是中等的，但当剂量不平衡时，形态有利于大多数亲本。每一代都有形态异常的个体。回交2代后出现了全新的表型(如种子和花色)，人们认为这是因为重组。
Recurrent (introgressive) backcrossing of P. vulgaris * P. acutifolius to either parent increased fertility, as measured by pollen stainability and seed set per pod, but invariably resulted in the loss of traits from the non-recurrent parent. When hybrids were backcrossed to each parent species alternately (congruity backcrossing; CBC), fertility decreased in early generations, but gradually increased later, reaching parental levels of seeds/pod by the 4th or 5th generation, although percentage stainable pollen did not reach parental levels. The morphology of CBC hybrids depended on the dosage of the parent species; morphology was intermediate when the pedigree had an equal dose from each parent, but favoured the majority parent when dosage was unbalanced. Morphologically abnormal individuals occurred in each generation. Completely new phenotypes (e.g. for seed and flower colour) appeared after the 2nd backcross generation, due, it is thought, to recombination.