PJB-2023-469
HETEROTIC STUDY IN RICE FOR YIELD AND ASSOCIATED TRAITS
Fasihuddin
Abstract
Realizing the inherent potential of hybrid rice for enhanced yield, this study was undertaken to assess magnitude of heterosis in F1 rice hybrids for yield associated traits. These 56 F1 hybrids were derived from crossing of 8 parents in 8×8 diallel mating design and were planted in randomized block design with three replications at two locations of Pakistan, Khyber-Pakhtunkhwa (KP) province namely Peshawar and Mansehra. Pooled analysis of variance revealed significant (P≤0.01) differences among the locations and genotypes for primary branches panicle-1 (PBP), grains panicle-1 (GPP), 100-grain weight (100-gw) and grain yield (GY). At Peshawar, F1 hybrid Shaheen-Basmati (SB)×Shua-92 revealed maximum PBP (13), GPP (98), 100-gw (4.0 g) and GY (13.5 t ha-1) while at Mansehra, among F1 hybrids, SB×Shua-92 manifested highest number of GPP (102) while F1 hybrid SB×Basmati-2000 displayed maximum 100-gw (3.8 g). Similarly, F1 hybrid SB×DR-83 revealed maximum PBP (13) at Mansehra. Most of the F1 hybrids showed significantly positive better-parent (BP) heterosis for studied traits at both the locations. At Peshawar, F1 hybrid SB×Shua-92 revealed highest BP-heterosis for PBP (44.4**) and GY (141.07**). F1 cross combination DR-83×DR-92 showed maximum BP-heterosis for GPP (49.09**) while F1 hybrid KS-282×DR-82 displayed highest BP-heterosis for 100-gw (15.15). Similarly, at Mansehra, F1 hybrid SB×DR-82 revealed highest BP-heterosis for PBP (33.3**) and 100-gw (18.75) whereas F1 cross combination SB×Shua-92 manifested highest BP-heterosis for GPP (61.90**). F1 hybrid KS-282×SB displayed highest BP-heterosis for GY (114.55**). F1 cross combinations, SB×Shua-92, SB×DR-82, SB×Basmati-2000, SB×DR-83, KS-282×DR-83, KS-282×DR-82, KS-282×SB and DR-83×DR-92 excelled in performance for studied traits. These F1 rice hybrids are recommended for commercial use after multi-locational trials while segregating generations of these hybrids could be advanced to develop rice cultivars with desirable attributes.
To Cite this article:
Download
