Results 61 to 70 of about 1,510 (159)

Quality assessment of pollen of pear genotypes for their use in breeding

Новые технологии, 2019
The morphological quality indices of pollen of 14 pear genotypes have been studied in the conditions of the humid subtropics of the south of Russia. Viability and fertility have been determined, and variational curves of pollen grain sizes have been ...
N. S. Kiseleva
doaj   +1 more source

Microsporogenesis and pollen formation in cassava

Biologia plantarum, 2011
This article describes the complete microsporogenesis and pollen formation in cassava (Manihot esculenta Crantz) at the various developmental stages (pollen mother cell, meiosis, tetrads, early free spore, mid uninucleate, late uninucleate, binucleate and mature pollen grain).
Wang, C., Lentini, Z, Tabares Z., Eddie, Quintero, M., Ceballos, H., Dedicova, Beata, Sautter, C, Zhang, P., Olaya, C.   +8 more
openaire   +4 more sources

Microsporogenesis and the biosynthesis of floral small interfering RNAs in coffee have a unique pattern among eudicots, suggesting a sensitivity to climate changes

Plant Direct, Volume 8, Issue 1, January 2024.
Abstract Recently, the siRNAs pathways, and especially reproductive phasiRNAs, have attracted attention in eudicots since their biological roles are still unknown and their biogenesis took different evolutionary pathways compared to monocots. In this work, we used Coffea arabica L., a recent allotetraploid formed from the hybridization of Coffea ...
Kellen Kauanne Pimenta de Oliveira, Raphael Ricon de Oliveira, Gabriel de Campos Rume, Thales Henrique Cherubino Ribeiro, Christiane Noronha Fernandes‐Brum, Laurence Rodrigues do Amaral, Atul Kakrana, Sandra Mathioni, Blake C. Meyers, Matheus de Souza Gomes, Antonio Chalfun‐Junior   +10 more
wiley   +1 more source

NOTE - Meiotic irregularities in Capsicum L. species [PDF]

Crop Breeding and Applied Biotechnology, 2012
Cytogenetic and pollen viability (PV) studies were performed in pepper accessions, Capsicum chinense and Capsicum baccatum. Irregularities such as laggard and univalent chromosomes, bridges, problems in the spindle fibers and cytomixis were observed ...
Margarete Magalhães Souza, Telma Nair Santana Pereira, Cláudia Pombo Sudré, Rosana Rodrigues   +3 more
doaj  

The creation of new aneuploid lines of the cotton (Gossypium hirsutum L.) with identification of chromosomes by translocation and SSR-markers

Вавиловский журнал генетики и селекции, 2016
The use of monosomic lines significantly increases the effectiveness of molecular-genetic analysis and the development of superior quality breeding lines via substitutions by alien chromosomes.
M. F. Sanamyan, Sh. U. Bobokhujaev, A. X. Makamov, S. G. Achilov, I. Y. Abdurakhmonov   +4 more
doaj   +1 more source

Microsporogenesis in hexaploid Morus serrata Roxb.

CYTOLOGIA, 1989
Detailed microsporogenesis of hexaploid Morus serrata has been studied. This is the first record of natural hexaploidy (2n=6x=84) in the species. Meiosis has been found regular with high frequency of bivalents. The frequency of hexa-, penta-, tetra- and trivalents is considerably less suggesting its allopolyploid nature.
null Basavaiah, S. B. Dandin, Mala V. Rajan   +2 more
openaire   +2 more sources

Estudios cromosómicos en Acmella bellidioides (Sm.) R.K.Jansen (Asteraceae) del nordeste de Argentina Chromosomal studies in Acmella bellidioides (Sm.) R.K.Jansen (Asteraceae) from northeast Argentina

Gayana: Botanica, 2011
Acmella bellidioides es una hierba perenne pequeña, que crece naturalmente en las provincias del nordeste de Argentina, en Brasil, Paraguay y Uruguay.
Patricia M Aguilera, Ana I Honfi, Julio R Daviña   +2 more
doaj  

MERISTEM STRUCTURE, DEVELOPMENT OF CONES AND MICROSPOROGENESIS OF TEHRAN PINE (PINUS ELDARICA Medw.) [PDF]

Journal of Plant Development, 2014
Tehran pine (Pinus eldarica Medw.) belongs to Pinaceae family with significant economic and ecological benefits. To gain further insight into anatomical-developmental structure of P.
Ahmad MAJD, Saeed IRIAN, Parisa JONOUBI, Faride ASGARI   +3 more
doaj  

Reproductive studies in ipecac (Psychotria ipecacuanha (Brot.) stockes; Rubiaceae): pollen development and morphology

Brazilian Archives of Biology and Technology, 2008
The aim of this work was to carry out the reproductive studies on Brazilian accessions of ipecac, Psychotria ipecacuanha. It presented heterostyly, with brevistylous and longistylous flowers.
Margarete Magalhães Souza, Ernane Ronie Martins, Telma Nair Santana Pereira, Luiz Orlando de Oliveira   +3 more
doaj   +1 more source

Relação entre os estádios de desenvolvimento dos micrósporos e as características morfológicas do botão floral em pimentão (Capsicum annuum L.) Relationship among the development stages of microspores and the morphological characteristics of the floral bud in sweet pepper (Capsicum annuum L.)

Ciência Rural, 1995
Vários fatores influenciam a cultura de anteras, entre eles, o estádio de desenvolvimento dos micros poros. O presente estudo teve por objetivo verificar a relação entre o estádio de desenvolvimento dos micrósporos com algumas características ...
José Magno Queiroz Luz, Renata Silva, Lisete Chamma Davide, José Eduardo Brasil Pereira Pinto   +3 more
doaj   +1 more source