The study undertaken to assess the genetic changes on
yield, agronomic traits and foliar diseases during the last
39 years (1969 to 2008), revealed 103.5 % yield
improvement over the years @ 2.6 % per year. The annual
genetic gain in seed yield of soybean varieties released
in India during this period was approximately 23 kg ha-1.
This yield increase was assigned to increase in number
of pods and seeds per plant. Seeds per plant increased
by 1.56 % per year. Foliar diseases decreased consistently
over the period. Varieties namely Kalitur, Bragg, Punjab 1,
PK 308, PK 471, JS 71-05, NRC 2, PS 1042, JS 93-05 and
PS 1347 were stable over the seasons for the yield.
Varieties namely Kalitur, Bragg, Punjab 1 and PS 1042 were
found suitable in unfavorable seasons while varieties viz.,
PK 308, PK 471, JS 71-05, NRC 2, JS 93-05 and PS 1347
were found suitable in favorable seasons. None of the
varieties was found consistently superior for all the
characters in all the seasons.
Keywords: Soybean, Glycine max, variety development, yield gain, foliar disease
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906
Rajkumar Ramteke, G. K. Gupta, Pooja Murlidharan and S. K. Sharma info_circle