Interspecific hybridization between Cajanus cajan (L.) Millsp. and C. lanceolatus (WV Fitgz) van der Maesen. Issue 2 (August 2014)

• Record Type: Journal Article
• Authors: Srikanth, Sandhya; Rao, M. V.; Mallikarjuna, Nalini
• Is Part Of: Plant genetic resources. Volume 12:Issue 2(2014)
• Page Start: 255
• Page End: 258
• Publication Date: 2014-08
• Subjects: Plant genetics -- Periodicals; Plant breeding -- Periodicals; 632.523
• DOI: 10.1017/S1479262113000361
• Languages: English
• ISSNs: 1479-2621

Abstract

<abstract abstract-type="normal"> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>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 <italic>Cajanus lanceolatus</italic>, 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.</p> </abstract>