Physiological Basis of Yield Variation in Short-duration Pigeonpea Grown in Different Environments of the Semi-Arid Tropics

Chauhan, Y S and Johansen, C and Saxena, K B (1995) Physiological Basis of Yield Variation in Short-duration Pigeonpea Grown in Different Environments of the Semi-Arid Tropics. Journal of Agronomy and Crop Science, 174 (3). pp. 163-171. ISSN 1439-037x

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Five short-duration pigeonpea (Cajanus cajan (L.) Millsp.) genotypes were grown at three plant populations in three locations during the 1986 and 1988 rainy seasons, to determine the physiological basis of observed variations in yield. Significant differences were found in seed yield (Y), crop growth rate (C), and the durations of vegetative (Dv) and reproductive (Dr) growth, and partitioning (P). These were attributable to genotypes and their interactions with environments (except for C). Variation in C, Dr, and P together explained 78 % of the observed variation in Y due to different genotypes and environments. Crop growth rate alone contributed about 71 % of the variation in Y, and reached an optimum value of around 6.5 kg ha−1°Cd−1. Crop growth rates increased with the duration of the vegetative period and with plant population. However, a negative relationship between C and P resulted in plant population having little effect on seed yield. The maximum-yielding genotype, ICPH 8 had the highest C and an intermediate P

Item Type: Article
Uncontrolled Keywords: Cajanus cajan L. Millsp;pigeonpea;crop growth rates;partitioning;phenology;yield;biomass
Subjects: Mandate crops > Pigeonpea
Depositing User: Library ICRISAT
Date Deposited: 27 Oct 2011 03:58
Last Modified: 27 Oct 2011 03:58
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Acknowledgement: We thank the administrations of the College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyaiaya, Gwalior and Haryana Agricultural University, Hisar for facilitating collaborative arrangements with ICRISAT to allow the conduct of these experiments in northern India. We are grateful to Drs N. P. SAXENA and O. P. RUPELA, ICRISAT for supervising the experiments in northern India. The capable technical assistance of staff of the Crop Physiology Unit, Agronomy division, ICRISAT in the conduct of these experiments is gratefully acknowledged.
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