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PHENOTYPIC DIVERSITY AND TRAIT ASSOCIATION IN BREAD WHEAT (TRITICUM AESTIVUM L.) LANDRACES FROM BALUCHISTAN, PAKISTAN

M. SHAHID MASOOD, ASIF JAVAID, M. ASHIQ RABBANI AND RASHID ANWAR

Abstract: A total of 298 wheat landraces collected from Baluchistan province of Pakistan were used to estimate genetic variation for 12 quantitative characters. Substantial amount of genetic diversity was displayed for most of the characters studied. Mean values of landrace genotypes were compared with three improved cultivars. The landraces were, on average, later in days to heading, having more leaf area, and taller than the cultivars but had lower values for grain filling period, spike length, spikelets /spike, biological yield, grain yield and chlorophyll content. Days to heading correlated positively with days to physiological maturity, plant height and number of spikelets per spike but negatively with 1000-grain weight, biological yield and grain yield. The important trait grain yield was negatively correlated with all the characters in this study except 1000-grain weight and biological yield.
 

Plant Genetic Resources Program, NARC, Islamabad, Pakistan.