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Flowering by selected serradella and subterranean clover lines in response to vernalisation and photoperiod treatments

conference contribution
posted on 2023-05-23, 15:11 authored by Goward, L, Haling, R, Rowan SmithRowan Smith, Beth PenroseBeth Penrose, Simpson, R
Serradellas are promising alternative annual legumes for permanent, temperate pastures. However, many current cultivars exhibit unstable flowering dates relative to subterranean clovers. This is a potential risk for seed production and persistence. Early and late maturing cultivars of yellow serradella, French serradella and subterranean clover were subjected to six vernalisation (VRN) treatments (0, 1, 3, 5, 7 or 9 weeks at 5℃) and four photoperiods (PPD) (8, 12, 16 or 20 hours) to determine how these stimuli affected flowering time, as measured by nodes to first flower. The cultivars differed in their responses to VRN and PPD treatments. The flowering time of early maturing cultivars was insensitive (cv. King) or weakly responsive (cvv. Eliza, Izmir) to photoperiod and required 0-1 week of VRN to minimise the time to flowering. In contrast, late season types (cvv. Avila, Serratas, Goulburn) had stronger photoperiod and vernalisation responses with longer photoperiods required to hasten flowering when vernalisation was <3 weeks. These results inform selection of cultivars with appropriate flowering times and improved flowering date stability.

History

Publication title

Proceedings of the 20th Agronomy Australia Conference: System Solutions for Complex Problems

Pagination

1-4

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Australian Society of Agronomy

Place of publication

Australia

Event title

20th Agronomy Australia Conference

Event Venue

Toowoomba, Queensland

Date of Event (Start Date)

2022-09-18

Date of Event (End Date)

2022-09-22

Rights statement

Copyright unknown

Repository Status

  • Restricted

Socio-economic Objectives

Sown pastures (excl. lucerne)

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