Biometrical characteristics of R2 generation of anther-derived pepper (Capsicum spp.) plants

Abstract

A b s t r a c tEight anther-derived DH lines of pepper hybrids: two red-fruited (AP14, AP15) and two yellow lines (AP25 and AP32) of C. annuum (ATZ1 × PO)F2, two lines of (C. frutescens × C. annuum)F1 (FA1, FA2), and two of (C. frutescens × C. chinense)F1 (FCH2, FCH3), were studied regarding important morphological plant and fruit characters. C. annuum breeding line 'ATZ1' was used as a standard. The following traits were evaluated: total fruit yield, fruit weight, weight of placenta with seeds, technological matter, pericarp thickness, extract content, dry matter content, weight and number of seeds per fruit. The level of homogeneity within the DH lines was analysed with a one-way analysis of variance, additionally the values of coefficient of variation (CV) were determined for the tested plant characters. The highest phenotypic uniformity was noted for the red-fruited lines obtained from anthers of (ATZ1 × PO)F2 and for the DH lines of (C. frutescens × C. annuum) F1, while the least uniform were FCH2 and FCH3 lines of (C. frutescens × C. chinense)F1. The DH lines AP14 and AP15, as well as FA1 and FA2 were phenotype homogeneous in respect of weight of fruit, technological matter, pericarp thickness and extract content. For these parameters, also the values of CV were the lowest. Statistically significant interline polymorphism between the androgenic lines of the same origin was detected among the lines of C. annuum (ATZ1 × PO)F2.

Assessment of Androgenic Genotypes Obtained from Sweet Pepper Varieties (Capsicum annuum L.)

“…The results for morphological traits of fruits of androgenic plants of hybrid-crosses between C. frutescens L. and C. chinense Jacq. are in agreement with our results regarding to variability of traits and their stability in their consequent generations of testing [22]. The results of agrimorphological traits of androgenic fruits from the variety Boogie F1 are in agreement with our results for the fruit length, width and weight [7].…”

“…The breeding importance of androgenic lines can be determined on the basis of analysis of plant and fruit traits in successive generations. Several comprehensive researches were conducted for characterization of different traits of androgenic pepper genotypes to find valuable parameters for future pepper breeding [9][10].…”

Evaluation and Agronomic Potential of Androgenic Pepper Genotypes Derived from Piran (Capsicum annuum L. cv. Piran)

“…The most authors agree that variation degree of morphological trait is genetically dependent and inherited, but they are always influenced by the complex of external factor, cultivation technology and practices, under protected conditions or open field conditions [18,25]. When making pepper characterization it is obvious that the most variations are observed in fruits, an organ which determines taxonomy and variety of the species [1,6,14,20,27,28]. F size and shape, pericarp thickness and yield fruit are quantitative traits which are governed by polygenes, as well influenced by environment.…”

“…In regards to fruit characteristics of androgenic lines, there is a report for selection of 5 superior dihaploid lines and observation of considerable variation in plant and fruit traits among other lines [26]. Other research group reported androgenic pepper lines of R2 progeny with improved yield characteristics and dry matter content in fruits [27]. Androgenic lines with positive traits were found after detailed characterization of morphological and production parameters of androgenic pepper fruits [28].…”

“…Phenotypic homogeneity of an androgenic population can point to the high level of its homozygosity. Besides, due to a necessity of providing a biometrical description of the most important plant and fruit parameters, this method additionally allows for a simultaneous selection of the lines which present the characters of interest to breeders and for allocating them for further breeding work [27]. On the other hand, phenotypic variation of plant and fruit traits may be the result of environmental conditions, which may often modify plant morphology.…”