Association of agronomic traits with isozyme loci in perennial ryegrass (Lolium perenneL.)

✍ Scribed by M. O. Humphreys

• Publisher: Springer
• Year: 1992
• Tongue: English
• Weight: 718 KB
• Volume: 59
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00041266

✦ Synopsis

Inbred lines possessing different genotypes at three isozyme loci, PGI-2, GOT-3 and ACP-1, were produced by two generations of selfing from two contrasting cultivars of perennial ryegrass. Four separate F2 populations were obtained by selling or crossing F1 plants from crosses between cultivar inbred lines. F2 plants were scored for genotype at the three isozyme loci and for eight agronomic traits. The three isozyme loci showed independent segregation confirming that they belonged to separate linkage groups. A consistent association was observed between water soluble carbohydrate content and genotype at the PGI-2 locus. Some association was also detected between genotype at the ACP-1 locus and heading date. The relevance of these observations to ryegrass breeding programmes is discussed.