Development of working model for distinct recognition mechanism for the self-incompatibility system in Prunus (Rosaceae)

2015 Fiscal Year Final Research Report

• Project/Area Number: 24248007
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Horticulture/Landscape architecture
• Research Institution: Kyoto University
• Principal Investigator: TAO Ryutaro 京都大学, (連合)農学研究科(研究院), 准教授 (10211997)
• Co-Investigator(Kenkyū-buntansha): YAMANE Hisayo 京都大学, 農学研究科, 講師 (80335306) ; HABU Tsuyoshi 愛媛大学, 農学部, 助教 (60335304)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 果樹 / 受粉受精 / 園芸ゲノム科学 / 遺伝子解析 / 組換え遺伝子 / オウトウ / ウメ / 生殖隔離

Outline of Final Research Achievements

Prunus (Rosaceae) exhibits the S-ribonuclease (S-RNase)-based gametophytic self-incompatibility (GSI), which hinders effective fruit production and breeding in Prunus fruit trees. This system is also present in the families Plantaginaceae and Solanaceae and the tribe Maleae of the family Rosaceae. The consequences of pollen S gene mutations and heterodiallelic pollen production differ between Prunus species and other plants, suggesting there are different pollen S functions during self/nonself-recognition. This study tested the working hypothesis that pollen expressed SLFLs located around the Prunus S locus region work as general inhibitor to detoxify all S-RNase. Results obtained have supported the working hypothesis but firm direct evidence has not been obtained.

Free Research Field

果樹園芸学