Registration of indeterminate and photoperiod‐insensitive IIPG‐7 and IIPG‐11 pigeonpea germplasm

Abstract

AbstractPigeonpea [Cajanus cajan (L.) Mill.] breeding lines (BL) IIPG‐7 (Reg. no. GP‐326, PI 704909) and IIPG‐11 (Reg. no. GP‐327, PI 704910) were developed at the University of Puerto Rico. Both BL were bred to have indeterminate flowering habit and photoperiod insensitivity. The agronomic performance of IIPG‐7, IIPG‐11, and checks was tested during different growing seasons in Isabela and Lajas, Puerto Rico. IIPG‐7 and IIPG‐11 were early maturing and initiated flowering at 73–84 days after planting (DAP), reaching harvest maturity at 121–127 DAP. This was in comparison to indeterminate cultivars ‘Ariel’, ‘Blanco Yauco’, ‘Kaki’, ‘Pinto Berrocales’, and ‘Super Pinto’, which initiated flowering at 91–102 DAP, reaching maturity at 138–148 DAP in short‐day conditions that occurred in October in both locations. These cultivars had seed yield values of over 1000 kg ha−1, whereas IIPG‐7 and IIPG‐11 produced 721–1010 kg ha−1. In contrast, IIPG‐7 and IIPG‐11 were the only indeterminate genotypes that initiated flowering at 42–88 DAP and reached maturity at 88–172 DAP under long‐day conditions (February, March, and May) in both locations. Seed yields of IIPG‐7 and IIPG‐11 varied from 626 to 2449 kg ha−1 in Isabela and were close to 2000 kg ha−1 in Lajas. IIPG‐7 has tan seed with reddish spots; IIPG‐11 has reddish seed with an average weight of 14 and 15 g per 100 seeds, respectively. The IIPG‐7 and IIPG‐11 BL can be used directly by growers or breeders to develop pigeonpea cultivars that can be planted year‐round.