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This article in CS

  1. Vol. 52 No. 6, p. 2507-2516
     
    Received: Aug 25, 2012
    Published: October 10, 2012


    * Corresponding author(s): isabel.vales@oregonstate.edu
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doi:10.2135/cropsci2012.04.0251

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

  1. M. I. Vales *a,
  2. R. K. Srivastavab,
  3. R. Sultanab,
  4. S. Singhc,
  5. I. Singhc,
  6. G. Singhd,
  7. S. B. Patilb and
  8. K. B. Saxenab
  1. a Dept. of Crop and Soil Science, Oregon State University, 109 Crop Science Bldg. Corvallis, OR 97331-3002
    b ICRISAT, Patancheru, 502 324, A.P., India
    c Punjab Agricultural Univ. (PAU), Ludhiana 141 004 Punjab, India
    d Vivekananda Parvathiya Krishi Anusandhan Sansthan (VPKAS), Almora, 263 601, Uttarakhand

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.

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Copyright © 2012. Copyright © by the Crop Science Society of America, Inc.