A team of researchers in India has bettered an immensely popular pearl millet hybrid, HHB 67 Improved, endowing it with 58% higher resistance to downy mildew (DM) disease. The latest improvement has also increased the hybrid’s blast resistance by 12%, grain yield by 15% and dry fodder yield by 21% while retaining its hallmark early-maturity trait.

1. Newsletter
Happenings
In-house version 23 April 2021, No.1903
Ateam of researchers in India has bettered an
immensely popular pearl millet hybrid, HHB 67
Improved, endowing it with 58% higher resistance to
downy mildew (DM) disease. The latest improvement
has also increased the hybrid’s blast resistance by 12%,
grain yield by 15% and dry fodder yield by 21% while
retaining its hallmark early-maturity trait.
Researchers at ICRISAT partnered with Chaudhary Charan
Singh Haryana Agricultural University (CCSHAU) and
ICAR-All India Coordinated Research Project on Pearl Millet
(AICRP-PM) for the second cycle improvement of HHB 67
Improved hybrid. Using genome-wide simple sequence
repeat (SSR) DNA markers, three DM resistance loci
(quantitative trait loci or QTLs) were moved to the male
parent of HHB 67 Improved. Scientists at ICRISAT’s
Center of Excellence in Genomics and System Biology,
Genetic Gains Research Program, stacked the three DM
resistance QTLs from different chromosomes (linkage
groups 3, 4 and 6) of the donor parents.
Feature story
A good pearl millet hybrid gets even better
The latest improvement has been christened HHB 67
Improved 2-7 (meaning HHB 67 Improved second cycle
improvement, 7th
version). It was tested in Essentially
Derived Variety multi-location, multiyear trials of
AICRP-PM in A1 and A (dry) zones of India.
The need for improvement
HHB 67 pearl millet hybrid was released in 1990 and
soon became a farmer-preferred hybrid owing to its
extra-early maturity that helped the plant escape end
season drought. However, this hybrid became
susceptible as the incidence of DM increased in western
India, warranting improvement. The HHB 67 Improved,
with DM resistance, was released in 2005.
More than two million people enjoy food security due to
HHB 67 Improved in India. This extra-early, DM-resistant
farmer and consumer-preferred hybrid is grown in more
than 800,000 ha out of 7-7.5 million ha in which pearl
millet is grown every year. This popular hybrid has
HHB 67 Improved 2-7 is a second cycle improvement in a popular pearl millet hybrid.
Photo: Rakesh Srivastava, ICRISAT