Rumman Ara
Senior Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra
A study on exploiting heterosis by crossing five parents following full- diallel fashion in winter chilli was conducted at the experimented field of SRC, Bogra during winter season of 2011-2012. F1 seeds along their parents were collected and stored for F1 performance study in following year.
Chilli, Crossing, Exploitation, Heterosis
Spices Research Center,BARI, Shibganj, Bogra
Variety and Species
To exploit heterosis by crossing chilli lines in a 5 × 5 full-diallel fashion.
The experiment was carried out at the experimental field of Spices Research Center, BograI during winter season of 2011-2012. Seeds of five parents (lines) viz. C0522, C0578, C0582, C0587 and C0606 were seeded directly in the main field on October 30, 2011. The experiment was laid out following mating design with two replications having plot size of 3.0 m ×1.0 m providing a spacing of 50 cm×50 cm. Crossings were made following 5 × 5 full-diallel fashion.All possible crossing including reciprocal was made among the parents. Selfing was done by putting individual bamboo made frame with net (16 mesh). Emasculation was done before anthesis of the flower and calyxes were still covering the anthers and stigma. The anthers removed from the flowers of the selected female parents with the help of fine forcep before pollination. Freshly dehisced anthers were picked from selected male parents and dusted on the stigma of the emasculated flower. The female and male were covered with net to avoid contamination and pollination. Thinning of flowers/ buds was done in female plants. Crossed flowers were labeled by different colored thread according to date.
Spice Research Report 2011-12
Number of crossings, number of fruit set and number of fruits from different combinations varied from parent to parent furnished in Table 2. The highest number of crossings (117) was done in P1×P3 and number of fruit set (103) and number of fruits (92) were recorded maximum in the same combination (P1×P3). Besides, a noticeable number of crossings were performed in P2×P4 (70), P2×P3 (65), P4×P1 (65) and P1×P2 (64). Among these crossings, maximum number of fruit set was recorded in P1×P2 (63) followed by P2×P3 (62), P2×P4 (56) and P4×P1 (44), respectively. Finally, number of fruits harvested from P1×P2 (53) was found maximum among above cross combinations.
Seeds of different cross combinations along their parents will be sown in next season to study the exploiting heterosis.
Report/Proceedings