摘要:
以立冬本和青壳宝圆杂交后代为试材,对杂种后代果实13个性状进行测定并分析它们的遗传变异。结果表明,龙眼杂种后代果实大小、果肉厚度、可溶性固形物含量、种子大小和可食率属于数量性状遗传,果肉质地属于质量性状遗传;龙眼杂种后代果实大小有趋小回归和退化的遗传倾向,低亲遗传极其明显;在亲本(立冬本、青壳宝圆)同为高可溶性固形物含量、大种子和甜味时,杂种后代遗传有明显的趋小变异,但也有出现高亲的遗传表现;龙眼果肉不流汁对流汁、离核易对离核难、果皮颜色青褐色对黄褐色、果肉乳白色对黄白色在杂种后代中有较大的遗传优势,而种脐大小在杂种后代中表现趋中变异。
关键词:
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龙眼
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杂种后代
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果实性状
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遗传变异
Abstract:
Some fruit qualitative characters of longyan filial generation which originated from a cross-combination of "Lidongben"×"Qingkebaoyuan",were estimated in this paper.The results showed that the fruit weight,flesh thickness,total soluble solids content,seed weight and edible rate were the quantitative trait inheritance,while the flesh texture was quality trait inheritance.The fruit weigh tended to continuously reduce in regression andysis,and the lower-parent inheritance was evident.The total soluble solids content,seed weigh and flesh texture tended to descendant when their parent’ characters were alike,but they had higher value than their parents.The heterosis in characters of not exuding juice,easy peeling flesh to seed,blue-brown in pericarp and milky in flesh was observed in majority of hybrid progenies,while the seed hilum size mediated between their parents.
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