Vol. 15 No. 3
Phenotypic stability in brinjal genotypes
Author(s): S. AKHTAR, AAKANKSHA, R. KUMARI, S.S. SOLANKEY AND D.K. BARANWAL
Abstract:
Brinjal is a popular day neutral vegetable crop, but it is somewhat thermosensitive. A temperature regime of 18 to 25 °C with warm climate is desirable for successful brinjal production. Both higher and lower temperatures severely hamper fruitset. Therefore, the performance of brinjal varieties varies throughout the different seasons in a year and also in different years. Hence, breeders aim at developing stable varieties. Our objectives were to observe the genotype × environment interaction on brinjal genotypes, estimate phenotypic stability of yield attributes and identification of genotype(s) with stable performance. Twenty diverse genotypes were grown in three environments, namely, autumn-winter, 2013- ‘14, summer-rainy, 2014 and early autumn-winter, 2015- ‘16 in randomized block design replicated thrice. Analysis of variance depicted significant variation in the genotypes in addition to the environments. Significant G × E interaction were noted for fruit numberplant-1, average weight, length and girth of fruit and also plant height which also indicated the significance of both linear as well as non-linear components. The stable genotypes were different for different traits, viz., Rajendra Baingan-2 and IIHR 562 (plant height), IC 261802, Arka Neelkanth, Pusa Purple Cluster (plant spread), Brinjal 71-19 (days to 50% flowering), BRBR-01 and IC-261802 (days to first harvest), Punjab Brinjal-67, BRBL-04, Pusa Purple Cluster (fruit length), IC 261802, IC 89933, BRBL-01 (fruit girth), Pant Rituraj and BRBL-01 (number of fruits/plant), and BRBL-01, BRBL-04 and Punjab Brinjal-67 (for yield per plant and total yield). From this investigation BRBL-01, BRBL-04 and Punjab Brinjal-67 were identified as the most promising stable genotypes, and these could be cultivated throughout the year and also used in breeding programmes for developing stable varieties.
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