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Interspecific hybridization between Cajanus cajan (L.) Millsp. and C. lanceolatus (WV Fitgz) van der Maesen

Published online by Cambridge University Press:  28 August 2013

Sandhya Srikanth ,
M. V. Rao  and
Nalini Mallikarjuna
Sandhya Srikanth*
Affiliation:
Grain Legumes Program, International Crops Research Institute for Semi-Arid tropics, Patancheru PO 502 324, Andhra Pradesh, India Department of Plant Sciences, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
M. V. Rao
Affiliation:
Department of Plant Sciences, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
Nalini Mallikarjuna
Affiliation:
Grain Legumes Program, International Crops Research Institute for Semi-Arid tropics, Patancheru PO 502 324, Andhra Pradesh, India
*
* Corresponding author. E-mail: sandhya.thudumu@gmail.com
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Abstract

Cultivated pigeonpea has a narrow genetic base. Wild relatives play an important role in the efforts to broaden its genetic base. In this report, we present a successful wide-cross between the cultivated pigeonpea and Cajanus lanceolatus, a wild relative from the secondary gene pool, native to Australia, with desirable traits such as frost and drought resistance. A range of F1 progeny were obtained and the resultant F1 hybrid plants set mature pods and seeds. The hybrids had intermediate morphology, sharing the traits of both the parents. All the F1 hybrids flowered profusely. Some of the hybrids were completely male sterile and some were partially fertile with pollen fertility ranging from 35 to 50 %. Meiotic analysis of the fertile F1 hybrids revealed a high degree of meiotic chromosome pairing between the two parental genomes. Meiotic analysis of the sterile F1 hybrids revealed that the breakdown of microsporogenesis occurred at the post-meiotic stage after the formation of tetrads. Fertile plants formed regular bivalents with normal disjunction, except for occasional asynchrony at meiotic II division.

Keywords

bruchidCajanus lanceolatusgene poolsmeiosispigeonpeapollen fertilitysterility
Type
Rapid Communication
Information
Plant Genetic Resources , Volume 12 , Issue 2 , August 2014 , pp. 255 - 258
Copyright
Copyright © NIAB 2013 

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