Presenter Information

J R. Caradus, AgResearch, NZ

Publication Date

1993

Description

Selections were made within 10 cultivars of white clover (Trifolium repens L.) for rapid germination rale al 4°C. There were 2 selection cycles and progeny from crosses between genotypes selected from within cultivars were compared wilh the original unselected cultivar seed lines for ability to germinate at 4°C. There ·was significant variation among control cultivars and among selected lines for germination rate index at 4°C. Cultivars from northern Europe had a higher germination rate index than cultivars from New Zealand, Australia and Israel. Selection for increased germination rate index at 4°C was successful and the relationship between germination rate index of unselected cultivars with generation 1, and generation,i 1 with generation 2· were significant (b=0,89* and 0.47•, respectively).

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Selection for Improved Low Temperature Germination of White Clover Seed

Selections were made within 10 cultivars of white clover (Trifolium repens L.) for rapid germination rale al 4°C. There were 2 selection cycles and progeny from crosses between genotypes selected from within cultivars were compared wilh the original unselected cultivar seed lines for ability to germinate at 4°C. There ·was significant variation among control cultivars and among selected lines for germination rate index at 4°C. Cultivars from northern Europe had a higher germination rate index than cultivars from New Zealand, Australia and Israel. Selection for increased germination rate index at 4°C was successful and the relationship between germination rate index of unselected cultivars with generation 1, and generation,i 1 with generation 2· were significant (b=0,89* and 0.47•, respectively).