NDLI: The relationship between seedling growth and grain yield under drought conditions in maize and triticale genotypes

Content Provider	Springer Nature Link
Author	Grzesiak, Maciej T. Marcińska, Izabela Jawiak, Franciszek Rzepka, Andrzej Hura, Tomasz
Copyright Year	2012
Abstract	The effects of drought stress on seedlings’ growth and grain yield of 13 single cross maize hybrids and 11 breeding lines and cultivars of spring triticale were studied in greenhouse and field experiments. In the field experiment, the drought susceptibility index (DSI$_{GY}$) was calculated by determining the change in grain yield (GY) in conditions with two soil moisture levels (IR, irrigated; D, drought). In the greenhouse experiment the response to soil drought was evaluated using DSI$_{DW}$, by determining changes in the dry weight (DW) of vegetative plant parts. Marked variations in GY and DW were observed among the studied genotypes. In control conditions, the GY and DW in drought-sensitive genotypes were higher compared to the drought-resistant ones; but in drought conditions, the decreases in GY and DW in resistant genotypes were smaller than in drought-sensitive ones. DSI$_{GY}$ and DSI$_{DW}$ revealed variations in the degree of drought tolerance among the examined maize and triticale genotypes. The values of DSI$_{GY}$ in the field experiment and DSI$_{DW}$ in the greenhouse experiment enabled a division of the studied genotypes into drought-resistant or -sensitive groups. A close correlation between DSI$_{GY}$ and DSI$_{DW}$ was found. The positive linear correlation and determination coefficients between DSI$_{GY}$ and DSI$_{DW}$ were statistically significant (P = 0.05), being equal to R $^{2}$ = 0.614 (maize) and R $^{2}$ = 0.535 (triticale). The ranking of the studied genotypes based on DSI$_{GY}$ was in most cases consistent with the ranking based on DSI$_{DW}$, which indicates that genetically conditioned drought tolerance is similar for plants in the seedling and reproductive growth stages or may at least partly have a common genetic background.
Starting Page	1757
Ending Page	1764
Page Count	8
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	34
Issue Number	5
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Triticale (x Triticosecale Witt) Maize (Zea mays L.) Soil drought Drought susceptibility indexes Grain yield Seedlings’ biomass Agriculture Plant Pathology Plant Biochemistry Plant Anatomy/Development Plant Genetics & Genomics Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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