Segregations of Astringent Progenies in the F1 Populations Derived from Crosses between a Chinese Pollination-constant Nonastringent (PCNA) `Luo Tian Tian Shi', and Japanese PCNA and Pollination-constant Astringent (PCA) Cultivars of Japanese Origin

in HortScience
View More View Less
  • 1 Laboratory of Pomology, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
  • | 2 Department of Grape and Persimmon Research, National Institute of Fruit Tree Science, Akitsu, Hiroshima 729-2494, Japan
  • | 3 Experimental Farm, Graduate School of Agriculture, Kyoto University, Takatsuki City, Osaka 569-0096, Japan

Pollination-constant and nonastringent (PCNA) is one of the most desirable traits in persimmons as this type of cultivar loses its astringency while still on the tree before harvest. Among Japanese PCNA cultivars, the trait is qualitatively inherited and recessive to pollination-constant, astringent (PCA), pollination-variant, nonastringent (PVNA), and pollination-variant, astringent (PVA) types. However, in a previous trial, both astringent and nonastringent types segregated in the F1 population that resulted from a cross between a Chinese PCNA `Luo Tian Tian Shi' and a Japanese PCNA cultivar. Because of the unusual segregation, in this study, we crossed another Japanese PCNA `Okugosho' with `Luo Tian Tian Shi' to confirm the segregation of astringent types by measuring the tannin cell size and tannin concentration at harvest. Previously, we found that astringent types have larger tannin cells than PCNA-type. The F1 hybrid progenies from the cross segregated into both PCNA and astringent-type individuals in approximately 1:1 ratio. Likewise, the F1 population from the astringent-type `Yotsumizo' and `Iwasedo' × `Luo Tian Tian Shi' were ascertained to contain both PCNA and astringent types, which indicates that the PCNA trait of `Luo Tian Tian Shi' was dominant. Thus, this Chinese cultivar has the potential to become an important parental material for future breeding of PCNA persimmons.

Contributor Notes

Corresponding author; e-mail keizo@kais.kyotou.ac.jp.
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 315 64 7
PDF Downloads 250 97 17