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Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate

Citation

Pembleton, KG and Smith, RS and Rawnsley, RP and Donaghy, DJ and Humphries, AW, Genotype by environment interactions of lucerne (Medicago sativa L.) in a cool temperate climate, Crop and Pasture Science, 61, (6) pp. 493-502. ISSN 1836-0947 (2010) [Refereed Article]


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Copyright Statement

© CSIRO 2010

DOI: doi:10.1071/CP09269

Abstract

Genotype by environmental interactions in lucerne (Medicago sativa L.) present considerable challenges when selecting an appropriate cultivar for a particular location and farming system. Data on the yield and persistence of a range of lucerne cultivars and experimental lines grown in two Tasmanian environments, Forth (41.20°S, 146.27°E, Red Ferrosol soil, under cutting with high fertiliser inputs, i.e. a high yield potential environment) and Cranbook (42.00°S, 148.03°E, Red Ferrosol soil, under grazing with low fertiliser inputs, i.e. a low yield potential environment) were examined using winter activity class as the experimental factor. At Forth, winter-dormant lucernes were the lowest yielding genotypes. In contrast, at Cranbrook, highly winter-active genotypes had lower plant persistence and dry matter yield than winter-dormant genotypes. Modified joint linear regression analysis showed that in a cool temperate climate, winter-dormant genotypes are more suited to a low yield potential environment, whereas highly winter-active genotypes are adapted to a high yield potential environment. Both the semi-winter-dormant and the winter-active genotypes were adapted to all environments. The dry matter yield of winter-dormant and highly winter-active genotypes was most sensitive to environmental conditions in winter and spring, while performance of all cultivars and experimental lines was most stable over summer.

Item Details

Item Type:Refereed Article
Keywords:alfalfa, cultivar performance, genotype by environment interaction, perennial legumes
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agronomy
Objective Division:Animal Production and Animal Primary Products
Objective Group:Pasture, Browse and Fodder Crops
Objective Field:Lucerne
Author:Pembleton, KG (Dr Keith Pembleton)
Author:Rawnsley, RP (Dr Richard Rawnsley)
Author:Donaghy, DJ (Associate Professor Danny Donaghy)
ID Code:58271
Year Published:2010
Web of Science® Times Cited:6
Deposited By:Agricultural Science
Deposited On:2009-09-23
Last Modified:2011-04-13
Downloads:0

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