Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

STUDIES ON F2 AND FIRST BACKCROSS POPULATION OF INTERSPECIES BRASSICA CROSSES (Pages : 1 - 5)

An experiment was conducted at the experimental farm of the Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh during rabi season of 1995-1996. This was designed to study the F2 and first back cross (BC1) populations of some interspecies crosses of the genus Brassica. In this study six parental lines/ varieties, 7 F2 populations and 7 BC1 generations from different interspecies crosses were used. Pollen sterility, number of siliquae per plant, siliqua length, number of seeds per siliqua, shattering percentage after 15 days of harvest and yield per plant were studied. The investigation revealed that the pollen sterility of F2 did not exceed the parentage range. The average number of seeds per siliqua was 13.27 and the percentage of siliqua shattering of F2 after 15 days of harvest (7.73%) was within the range of parents. The mean seed yield per plant of F2 was lower when compared the average of both the parents but the co-efficient of variation was very high (143.32%) and the range was 0-31.8g. In F2, it was observed that more pairs of characters were significantly and positively correlated than that found in their respective parents. Only one negative significant association was observed between pollen sterility and siliqua shattering percentage after 15 days of harvest. The results indicated that the interspecies cross between B. napus and B. campestris through these two genotypes would result into faster development of improved varieties through better combination effect. Download