Mode of Inheritance of Yield, Number of Pods, Days To First Flowering and Plant He[Ght in Pea (Pisum Sativum L.)*

Findings reported in this article were the part of a study done during 1969–71 in the Department of Horticulture, Punjab Agricultural University, Ludhiana on eight varieties of pea. In 1969–70, these varieties were crossed in n(n-l)/2 possible combinations. Next year all these crosses and eight parental varieties were sown in a randomized-block design, keeping three replications and five plants of each treatment from every plot were randomly selected for recording observations. Results were analysed by graphic analyses and further variance was partitioned into various components to ascertain the mode of inheritance, components of inter-and intra-allelic interactions, degree dominance, relative gene frequency and number of effective factors. Results for yield, bearing capacity, earliness and plant height have been reported in this article. Additive gene affects were prevailing for all the characters. Interactions affects of additive x additive was more important for yield and bearing. Dominance relationships were prominent for earliness and plant height. Parents were homozygous for all the characters. Parents could safely be classified into two groups for each variable. Dominant affects prevailed over recessives for yield, bearing capacity and earliness and vice versa was true for plant height. More than five factors governed earliness, above three yield and bearing and about two plant height. Information obtained from geometric analysis was also confirmed by the components of variance.