PJB-2018-144
CHARACTERISTICS AND REPRODUCTIVE GROWTH POTENTIAL OF HIMALAYAN SOYBEAN LAND RACES UNDER VARIOUS SOWING DATES
Asim Muhammad
Abstract
Information are lacking on the growth development phases of indigenous land races of soybean, particularly under different sowing dates. The objective of the present study was to compare and assess the influence of planting dates on the growth and development phases of indigenous land races and improved varieties of soybean. Three land races (Kulat brown, Kulat white, Mothi) and two improved varieties (NARC-II, Swat-84) of soybean were planted at monthly interval from April to July during 2004 and 2005 growing season at Khyber Pakhtunkhwa (North West Province) of Pakistan. Each sub plot of varieties was replicated four times in randomized complete block design with split plot arrangement. Data was recorded on days to 50 % emergence, flower initiation, bloom, pod initiation, pod elongation, seed initiation, seed formation and initiation of physiological maturity. Years, planting dates, varieties and planting dates x varieties interaction significantly affected days to all development phases studied. Maximum days to 50 % emergence (6), flower initiation (86), bloom (88), pod initiation (90), pod elongation (105), seed initiation (117), full seed formation (127), and physiological maturity (172), were recorded for April planted crop. Number of days to each phase decreased when planting was extended from April to July. Land races took maximum days to flower initiation (85), bloom (87), pod initiation (990, pod elongation (106), seed initiation (117), full seed formation (130), and physiological maturity initiation (160), except days to emergence. It was concluded that land races initiated flowering and reached physiological maturity, 41 days later than the improved varieties.
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