Open AccessGENETIC VARIATION IN WEED SEED DORMANCY AND THEIR MANAGEMENT IN CROPS: A REVIEW
Author(s) -
Bhagirath Singh Chauhan,
Michael Thompson,
Romesh Kumar Salgotra
Publication year - 2021
Publication title -
plant archives/plant archives
Language(s) - English
Resource type - Journals
eISSN - 2581-6063
pISSN - 0972-5210
DOI - 10.51470/plantarchives.2021.v21.no1.077
Subject(s) - outcrossing , biology , weed , genetic variation , genetic diversity , population , agronomy , genetic variability , inbreeding , seed dormancy , dormancy , ecology , germination , genotype , pollen , biochemistry , demography , sociology , gene
Evolution in the seed dormancy depends on the presence of heritable variation in weed populations. This genetic variation in weeds arises because of abundant, grow rapidly, and produce large numbers of off springs. Compared with other plant species, populations of weed species frequently show limited genetic variation in seed dormancy due to colonization, extensive clonal propagation, inbreeding, and the relative environmental homogeneity. Nevertheless, populations of weed species contain substantial store of genetic variation and genetic differentiation for seed dormancy and other reproductive traits because of pervasive feature of widely distributed nature of weed species. As a result, high level of genetic diversity among the weeds is fostered by hybridization, habitat longevity, environmental heterogeneity, outcrossing and large population size. The objective of this review is to update the existing literature concerned with genetic variation in seed dormancy and reproductive traits in weeds.