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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #304071
Title: Genetic diversity of water use efficiency in Jerusalem artichoke (Helianthus tuberosus L.) germplasm

Author
item JANKET, A - Khon Kaen University
item JOGLOY, S - Khon Kaen University
item VORASOOT, N - Khon Kaen University
item KESMALA, T - Khon Kaen University
item Holbrook, Carl - Corley
item PATANOTHAI, A - Khon Kaen University

Submitted to: Australian Journal of Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/15/2014
Publication Date: 5/20/2014
Citation: Janket, A., Jogloy, S., Vorasoot, N., Kesmala, T., Holbrook Jr, C.C., Patanothai, A. 2014. Genetic diversity of water use efficiency in Jerusalem artichoke (Helianthus tuberosus L.) germplasm. Australian Journal of Crop Science. 7:1670-1681.

Interpretive Summary: Little is known about the range of drought tolerance in Jerusalem artichoke. The objectives of this study were to investigate genetic variation for water use and water use efficiency in Jerusalem artichoke accessions and to identify superior genotypes for the characters under different water regimes. Forty Jerusalem artichoke genotypes were evaluated under three levels of irrigation. Data were recorded for tuber dry weight, biomass, relative water content, water use and water use efficiency. A large range of drought tolerance was observed, and three genotypes with high water use efficiency were identified. These genotypes should be useful parents in breeding programs for improving drought tolerance in Jerusalem artichoke.

Technical Abstract: Genetic diversity in crop germplasm is an important resource for crop improvement, but information on genetic diversity is rare for Jerusalem artichoke, especially for traits related to water use efficiency. The objectives of this study were to investigate genetic variations for water use and water use efficiency in Jerusalem artichoke accessions and to identify superior genotypes for these characters under different water regimes. Forty Jerusalem artichoke accessions were arranged in a strip plot design with four replications for two years. Three strip plots represented three water regimes (W1 = 100%, W2 = 75% and W3 = 45% of crop water requirement). Data were recorded for tuber dry weight, biomass, relative water content, water use and water use efficiency. The effects of water regimes and Jerusalem artichoke accessions were significant for all characters. Genotypes contributed the largest portions for water use efficiency for biomass and tubers. These results documented genetic diversity for water use efficiency in Jerusalem artichoke. The genotypes with high water use efficiency for biomass were HEL 231, HEL 65 and JA102XJA89(8). HEL 65 had high water use efficiency for tubers. These genotypes should be useful in future breeding programs for higher water use efficiency.