Breeding for Earliness in Pigeonpea: Development of New Determinate and Nondeterminate Lines

Vales, M I and Srivastava, R K and Sultana, R and Singh, S and Singh, I and Singh, G and Patil, S B and Saxena, K B (2012) Breeding for Earliness in Pigeonpea: Development of New Determinate and Nondeterminate Lines. Crop Science, 52 (6). pp. 2507-2516. ISSN 0011-183X

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Abstract

Considering the increasing demand for pigeonpea [Cajanus cajan (L.) Millsp.], especially in India, breeders have realized the need to develop high-yielding, super-early maturing (<90 d) lines that could be planted in a wider range of latitudes and/or altitudes to enhance the crop adaptation and to diversify the legume-based cropping systems. The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) initiated a breeding program in 2006 to develop “super-early” (flowering in <50 d) determinate (DT) and nondeterminate (NDT) pigeonpea lines. Eleven parental lines with days to 50% flowering ranging from 49 d (MN 5) to 103 d (ICP 6974) were crossed using a full diallel mating design. A pedigree-based approach was followed to select for early flowering. The selection gain was larger initially (reduction of 7 d) but there was less reduction (2 d) from F3 to F4. Determinate and NDT lines that flowered in 45 to 56 d at ICRISAT-Patancheru reached advanced (F5 and F6) generations. The newly developed lines flowered and matured at a higher latitudes (tested at 30° N vs. 17° N) and altitudes (tested at 1250, 545, and 247 m asl). These lines could be used in new cropping systems (i.e., pigeonpea–wheat [Triticum aestivum L.]) that would allow expanding pigeonpea production to nontraditional planting areas (i.e., wider latitudes and higher altitudes) and could even offer wider planting time flexibility to farmers.

Item Type: Article
Divisions: UNSPECIFIED
CRPS: UNSPECIFIED
Subjects: Mandate crops > Pigeonpea
Others > Genetics and Genomics
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 16 Oct 2012 03:37
Last Modified: 16 Oct 2012 07:43
URI: http://oar.icrisat.org/id/eprint/6188
Official URL: http://dx.doi.org/10.2135/cropsci2012.04.0251
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: The authors thank H.P. Thanki (former scientific officer of the ICRISAT’s Pigeonpea Breeding Program) and ICRISAT Patancheru’s lab assistants for their contributions in various technical aspects of this study. Special thanks to R.V. Kumar, C.L.L Gowda, and Ganga Rao for critical comments and suggestions to improve the manuscript. Thanks also to J.S.Sandhu and K.M. Chaudhari for contributing genotypes and feedback during the early stages of the breeding program.
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