MLN Phenotyping Services for Partners

KALRO and CIMMYT have been screening germplasm against MLN in Kenya since Nov 2012. The dedicated screening facility at KALRO Naivasha was established in 2013. This facility now represents a high quality phenotyping platform, permitting large-scale screening of germplasm from regional partners (both public and private sector).

The following table shows the number of entries and rows screened for National Research System (NRS) partners and seed companies since 2014.

 Season NARS Seed Companies
 Entries Rows Entries Rows
 2014A  3409  6761 5594 9226
 2014B  1724  3866  4827  7876
 2015B  3372  5077  3263  4038
 2016A  6785  6785  5410  7734
 2016B  4128  6006  4807  5005
2017A 2671 3379 1569 4285
2017B 1909 2488 2593 2593
2018 – January 354 354 4159 4159
2018- April 2561 4064 2622 2919
 Total 26,913  38,780  34,844  47,835

Partners using the Naivasha screening site in 2015-2018 include:

Partners Benefiting from the MLN Phenotyping Service (2015-17)

Private Sector Institution* Public Sector Institution**
SeedCo KALRO-Kenya
Western Seed EIAR-Ethiopia
Pannar ZARI-Zambia
Monsanto RAB-Rwanda
Pioneer KEPHIS
NASECO Makerere Univ.
Syngenta NARS-South Sudan
Tanseed  Muzambique
Gicheha Farm Malawi
Advanta Seeds Burundi
Victoria Seed  University of Nairobi
TAN seeds
Victoria Seeds

*MLN Screening is done free of charge for NARS

** MLN Screening is done on a cost recovery basis for private sector partners

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Over 150,000 entries have now been screened at Naivasha. A summary of the data is given in the following table:

Season Starting Location Entries* Total Rows
November 2012 Olerai and Sunripe Farm 2,636 5,272
June 2013 Olerai and Marula Farm 8,021 16,042
March 2014 Naivasha Facility 19,539 39,078
October 2014 Naivasha Facility 15,322 20,356
November 2015 Naivasha Facility 17,000 30,000
May 2016 Naivasha Facility 24,530 34,222
October 2016 Naivasha Facility 20,389 24,845
May 2017 Naivasha Facility 13,286 24,602
November 2017 Naivasha Facility 11,630 12,209
January 2018 Naivasha Facility 7592 10,375
April 2018 Naivasha Facility 18,508 21,046
  TOTAL 150,861 227,281

To date, close to 90% of materials screened at Naivasha are susceptible under artificial inoculation. However, resistant / tolerant materials have been identified. Four first generation MLN tolerant /resistant hybrids have been released in East Africa and a further 15-20 second generation hybrids are at advanced stages of testing.