Breaking breeding barriers inLycopersicon. 2. Breakdown of self-incompatibility inL. peruvianum(L.) Mill.

✍ Scribed by N. G. Hogenboom

• Book ID: 104616773
• Publisher: Springer
• Year: 1972
• Tongue: English
• Weight: 923 KB
• Volume: 21
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00036763

✦ Synopsis

Attempts were made to break the self-incompatibility in L. peruvianum by selection of mutated S-alleles through large-scale self-pollination on clones with pollen which was mutagenically treated in different stages of development . Besides self-compatibility was searched for in inbred lines .

The self-incompatibility in L. peruvianum was found to be very strict indeed . From more than 22,000 self-pollinations on 5 clones 1527 seeds were obtained, seed set being very erratic . The possible causes of this seed set are discussed . From 1527 seeds 1036 plants were raised and tested for self-compatibility .

In the progenies of 4 clones from 823 plants tested, 7 were more or less self-compatible . It is concluded that this self-compatibility was spontaneous and not the result of the mutagenic treatment .

In the progeny of the fifth clone plants were found which reacted as self-compatible at a temperature of about 40 °C and as self-incompatible at lower temperatures . It is suggested that this character -a high temperature sensitive incompatibility reactionis governed by one recessive gene .

In inbred lines plants were found with a stable form of self-compatibility and also plants with a high temperature sensitive incompatibility reaction.

The problems of an incompatibility research on inbred material are discussed . A brief survey is given of some of the characters found in inbred L . peruvianum . 1950 ; MCGUIRE and RICK, 1954 ; RICK and LAMM, 1955 ; RICK, 1963). Only GUNTHER et al . (1968) report a slight variation in the degree of self-incompatibility within a population .