ICRISAT Archival Report 2006 - The seedlings of success in the ...

identify maintainers and restorers of male sterility. Cultivar 85010 consistently gave rise to progeny with high level
of sterility (60−100 %).
Crosses between Cajanus platycarpus and C. cajan have given rise to progeny with variation for many desirable
characters. One such character is a high degree of male sterility in the progeny when crossed with cultivar ICPL
85010. To test the proof of concept if the progeny belonged to the class of CMS, they were crossed with diverse
parents including wild species C. platycarpus. The progeny from crosses with C. platycarpus gave rise to the
progeny, all with 100% male sterility. This shows that C. platycarpus maintains male sterility in the progeny.
Nalini Mallikarjuna and KB Saxena
Output target 5A.6: Trait-based breeding populations developed for selecting elite hybrid pigeonpea parental
lines (2011)
Activity 5A.6.1: Development of trait specific (diverse maturity, disease resistance, seed and pod size)
breeding populations for selecting new maintainers and restorers
Milestone 5A.6.1.1: For each trait, about 10−12 genetically diverse lines will be identified and crossed in a halfdiallel
mating scheme to generate B and R breeding populations for selection (KML/KBS/SP, 2011)
The main objective of breeding parental lines is to broaden genetic base of the restorers and maintainers. Such
genetic diversification of hybrid parents will help in increasing the magnitude of heterosis. During 2006, a program
on the diversification of parental line was initiated by making crosses among B-lines in a diallel mating scheme.
The similar approach is being followed to improve restorer lines.
K Madhavi Latha, KB Saxena and Suresh Pande
Output Target 5A.7: Hybrid pigeonpea technology exchange, capacity building of partners and
documentation (2010)
Activity 5A.7.1: Exchange improved technologies and new knowledge with ARIs, NARS, NGOs, private
sector, and farmers’ groups
Milestone 5A.7.1.1: ICRISAT partnerships with NARS and Hybrid Parents Research Consortium Partners
strengthened (KBS/CLLG/SP, annual)
Concerted efforts were made to enhance the partnership base for hybrid pigeonpea research and development.
During 2006, the number of members in pigeonpea hybrid parents’ research consortium increased from 9 to 14. In
addition, links were strengthened with NARS partners in India and China.
KB Saxena, CLL Gowda and S Pande
Milestone 5A.7.1.2: Seeds of elite parental lines, and hybrids multiplied and distributed to NARS and seed
companies (KBS, annual)
In 2006, seed of six A-lines and three hybrids were multiplied at Patancheru. Among the A-lines, ICPA 2043 (0.91
ha), ICPA 2047 (0.50 ha), ICPA 2048 (0.030 ha) and ICPA 2092 (0.16 ha) were multiplied in isolation using 1 male:
4 female ratio. Similarly, hybrids ICPH 2438 (0.30 ha), ICPH 2671 (0.30 ha) and ICPH 2741 (0.32 ha) were
multiplied in isolation using 1 male: 4 female rows.
During 2006, a total of 2114 hybrid pigeonpea seed samples were supplied to private seed companies, public seed
sector and NARS in India and other countries. This includes 1069 samples of hybrids, 164 A/B-lines, and 881
fertility restorer lines.
KB Saxena
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