Characterization of yield potential for RH-662: A new high yielding, stress and salinity tolerant cotton variety
Muhammad Yasin, Abid Ali, Mussarat Shaheen, Abdul Khaliq, Saghir Ahmad, Muhammad Rizwan, Hafiz Ghazanfar Abbas, Qurban Ali
RH-662 is a high yielding, CLCuV, salinity and heat tolerant cotton (Bt) variety developed by Cotton Research Institute, Khanpur (RYK), Pakistan. It is a local cross developed through hybridization linking two different cotton genotypes i.e., 319/08 and FH-113. F2 to F6 generations of this cross were advanced by modified bulk pedigree method during 2006-13. The variety was tested for the multilocation trials under different agro-climatic conditions during 2014-2015 and under national uniform trial during two consecutive years, 2016-17 and 2017-18. The variety was finally approved for cultivation in 2018 by Punjab Seed Council (PCS). The plant type of RH-662 is medium compact with 130-160 cm height along with yellow pollen. It has semi erect sympodial and monopodial branches and medium leaf size. This variety has solitary boll shape with 3.7-3.9 gm boll weight having 40-50 bolls per plant. The flower of variety emerges from 45-55 days and matures within 140-150 days. This variety has good boll opening with excellent fiber characteristics and 39.9 GOT. Its seed cotton yield potential is 6400 kg per hectare and average yield is 4260 kilo gram per hectare under different agro-ecological zones. This variety is highly tolerant to marginal and saline soils and also proved resistant to CLCuV and drought conditions. The release of this variety may be helpful to meet the needs of farmers, picking labor and all other stockholders including cotton industry.