Open AccessGenetic Variation for Salinity Tolerance in Spring Wheat
Author(s) -
Ashraf M.
Publication year - 1994
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1994.00099.x
Subject(s) - biology , heritability , salinity , agronomy , population , spring (device) , genetic variation , yield (engineering) , soil salinity , genetic variability , horticulture , zoology , ecology , genotype , mechanical engineering , biochemistry , genetics , demography , materials science , sociology , gene , engineering , metallurgy
In order to determine the magnitude of genetic variation for salinity tolerance in spring wheat, broad sense heritabilities of different yield components and seed yield were estimated for two F 2 populations. One population was derived from a cross of salt tolerant cv LU26S (from Pakistan) and salt tolerant cv Kharchia (from India). The second F 2 population was derived from a cross of cv LU26S and cv Candeal (from CIMMYT). Both F 2 populations and their corresponding parents were grown in pots containing soil salinized with 2.81 (control), 8, 16, and 24 dS/m prepared by dissolving NaCl + CaCl 2 (1:l by wt.) in full strength Hoagland nutrient solution. Broad sense heritability estimates, calculated at different salinity levels, of number of tillers per plant ranged from 0.49 to 0.60; of 1000 seed weight, from 0.57 to 0.80; of number of grains per spike, from 0.64 to 0.78; and of seed yield, from 0.60 to 0.91. These results suggest that improvement in salinity tolerance in the spring wheat is possible through selection and breeding.