Segregation of astringency in F1 progenies derived from crosses between pollination-constant, nonastringent persimmon cultivars
Segregation of astringency in F1 progenies derived from crosses between pollination-constant, nonastringent persimmon cultivars
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DOI：
10.21273/hortsci.39.2.371
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发表时间：
2004-04-01
期刊：
影响因子：
1.9
通讯作者：
Yamada, M
中科院分区：
文献类型：
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作者：
Ikegami, A;Yonemori, K;Yamada, M
日本柿子（Diospyros kaki Thunb.）品种根据果实涩味损失的性质分为四种类型。持续授粉的无涩味（PCNA）柿子随着果实的发育而在树上失去涩味。这种PCNA性状对其他三种类型，即授粉恒定型收敛型（PCA）、授粉变异型非收敛型（PVNA）和授粉变异型收敛型（PVA）具有质量遗传和隐性遗传。事实上，日本的PCNA品种杂交在F代中只产生PCNA类型，这在国家果树科学研究所最近的育种计划中得到了证明。尽管有这些先前的结果，我们在这里证明了非PCNA （PVNA， PVA和PCA）型后代在中国PCNA加入的“罗添添石”与日本PCNA品种“太树”杂交的F代中衍生率相对较高，尽管通过测量单宁细胞大小（区分PCNA品种与非PCNA品种的主要形态学特征），“罗添添石”被证实是真正的PCNA类型。通过对中国PCNA“罗甜甜石”与日本PCNA“太树”、日本PCNA“信树”与日本PCNA“太树”、日本PVNA（非PCNA）“黑隈”与日本PCNA“太树”的后代单宁细胞大小和单宁含量的分离研究，发现日本PCNA品种间的后代单宁细胞均为小单宁细胞，均为PCNA型。日本PVNA与PUNA品种间的单宁细胞较大，为非pcna型。然而，“罗甜甜石”与“太树”杂交形成的单宁细胞大小群体，表明“罗甜甜石”在收敛性上可能是杂合的。因此，中国的“罗甜甜石”与日本的PCNA品种在基因组成上应该是不同的。
Japanese persimmon (Diospyros kaki Thunb.) cultivars are classified into four types depending on the nature of astringency loss of the fruit. The pollination-constant, non-astringent (PCNA) persimmons lose their astringency on the tree as the fruits develop. This PCNA trait is qualitatively inherited and recessive to the other three types, pollination-constant, astringent (PCA), pollination-variant, nonastringent (PVNA), and pollination-variant, astringent (PVA). In fact, crosses among Japanese PCNA cultivars yield only PCNA type in F, generation as shown in recent breeding programs at the National Institute of Fruit Tree Science. Despite these previous results, we demonstrated here that non-PCNA (PVNA, PVA, and PCA) type offspring were derived at relatively high rates in the F, generation from a cross between 'Luo Tian Tian Shi', a PCNA accession from China, and the Japanese PCNA cultivar, 'Taishu, despite the fact that 'Luo Tian Tian Shi' was confirmed to be a true PCNA type by measuring tannin cell size, a principal morphological characteristic to distinguish PCNA cultivars from non-PCNA ones. When segregations of tannin cell size and tannin content in three progenies of the breeding populations derived from Chinese PCNA 'Luo Tian Tian Shi' x Japanese PCNA 'Taishu', Japanese PCNA 'Shinshu' x Japanese PCNA 'Taishu', and Japanese PVNA (non-PCNA) 'Kurokuma' x Japanese PCNA 'Taishu' were investigated, all offspring between Japanese PCNA cultivars contained only small tannin cells and were PCNA types, and those between Japanese PVNA x PUNA cultivars contained only large tannin cells and were non-PCNA types. However, hybrids between 'Luo Tian Tian Shi' and 'Taishu' segregated into populations of small and large tannin cells, indicating that 'Luo Tian Tian Shi' is likely heterozygous for astringency. Therefore, Chinese PCNA 'Luo Tian Tian Shi' should be different from Japanese PCNA cultivars in genetic makeup.