Evaluation of interspecific hybrid kiwifruit for the adaptability to warming conditions introduced from wild species native to Japan

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450036
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Horticultural science
• Research Institution: Kagawa University
• Principal Investigator: KATAOKA Ikuo 香川大学, 農学部, 教授 (60135548)
• Research Collaborator: BEPPU Kenji ; SUIZAWA Katsuhiko ; FUKUDA Tetsuo ; MIZUTANI Ryosuke ; SOGAWA Yuki ; SUGIMOTO Miho ; MATSUOKA Maki ; IKEDA Kouichiro
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: キウイフルーツ / シマサルナシ / 温暖化 / 環境ストレス / 自生種 / 種間雑種

Outline of Final Research Achievements

Tolerance to the environmental stress of the interspecific hybrids between Shimasarunashi (A.rufa) native to warm regions in Japan and kiwifruit (A. chinensis) was evaluated. Interspecific hybrids showed lower chilling requirement for bud break and the tolerance to high summer temperature showing lower incidence of the leaf burn in the field. Even under the artificial stress conditions of high temperature, drought or water logging, the interspecific hybrids hardly suffered leaf burn and maintained photosynthetic activity at a certain rate. These results suggest that the interspecific hybrid cultivars have the tolerance to wide range of environmental stress derived from A.rufa, and that these hybrid cultivars are applicable to the cultivation in the warm regions and A. rufa is useful materials in the breeding program of kiwifruit adapting to the warming.

Free Research Field

果樹園芸学